:root {
  --bg: #05070d;
  --panel: #111524;
  --panel-2: #171b2d;
  --cyan: #32d8f1;
  --cyan-soft: rgba(50, 216, 241, 0.14);
  --text: #eef4ff;
  --muted: #8d95a8;
  --border: rgba(75, 225, 255, 0.18);
  --danger: #ff8b8b;
  --danger-bg: rgba(255, 83, 112, 0.14);
  --shadow: 0 24px 80px rgba(0,0,0,.45);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(50, 216, 241, .12), transparent 34%),
    radial-gradient(circle at 80% 30%, rgba(67, 72, 151, .18), transparent 30%),
    linear-gradient(180deg, #05060b 0%, #070b13 100%);
}

button, input, textarea { font: inherit; }
button { cursor: pointer; }

.app-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 42px 0 72px;
}

.hero { text-align: center; margin-bottom: 28px; }
.eyebrow, .section-kicker {
  margin: 0 0 12px;
  color: var(--cyan);
  letter-spacing: .38em;
  font-weight: 800;
  font-size: 13px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1;
  background: linear-gradient(to right, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: none;
}
.subtitle { color: var(--muted); font-size: 20px; margin-top: 18px; }

.tabs {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin: 30px 0 34px;
}
.tab-btn {
  border: 1px solid var(--border);
  color: var(--muted);
  background: rgba(17,21,36,.7);
  padding: 14px 22px;
  border-radius: 16px;
  box-shadow: inset 0 0 28px rgba(50,216,241,.03);
}
.tab-btn.active {
  color: var(--text);
  border-color: rgba(50,216,241,.55);
  background: linear-gradient(90deg, rgba(50,216,241,.18), rgba(32,35,58,.75));
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  padding: 20px 24px;
  border-left: 5px solid var(--cyan);
  background: linear-gradient(90deg, rgba(50,216,241,.11), rgba(17,21,36,.45), transparent);
}
.section-header h2 { margin: 0; font-size: 24px; }
.button-row { display: flex; gap: 12px; flex-wrap: wrap; }

.primary-btn, .secondary-btn, .ghost-btn, .danger-btn {
  border: 1px solid transparent;
  border-radius: 14px;
  padding: 12px 16px;
  font-weight: 800;
}
.primary-btn { background: var(--cyan); color: #061018; box-shadow: 0 0 26px rgba(50,216,241,.25); }
.secondary-btn { background: var(--cyan-soft); color: var(--cyan); border-color: var(--border); }
.ghost-btn { background: transparent; color: var(--muted); border-color: rgba(255,255,255,.12); }
.danger-btn { background: var(--danger-bg); color: var(--danger); border-color: rgba(255,139,139,.25); }

.editor-card {
  margin-bottom: 18px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(17,21,36,.86);
  box-shadow: var(--shadow);
}
.editor-card.compact { margin: 0; }
.editor-card h3 { margin-top: 0; color: var(--cyan); }
label { display: block; color: var(--muted); font-weight: 700; margin-bottom: 14px; }
input, textarea {
  width: 100%;
  margin-top: 8px;
  background: #03050a;
  color: var(--text);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 14px;
  padding: 14px 16px;
  outline: none;
}
input:focus, textarea:focus { border-color: rgba(50,216,241,.7); }
.form-actions { display: flex; justify-content: flex-end; gap: 12px; flex-wrap: wrap; }
.hidden { display: none !important; }

.accordion-list { display: grid; gap: 14px; }
.topic-card {
  border: 1px solid var(--border);
  background: linear-gradient(120deg, rgba(17,21,36,.96), rgba(25,28,48,.94));
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 18px 45px rgba(0,0,0,.28);
}
.topic-head {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 26px;
  background: transparent;
  color: var(--text);
  border: 0;
  text-align: left;
}
.badge {
  background: var(--cyan-soft);
  color: var(--cyan);
  padding: 9px 13px;
  border-radius: 11px;
  font-weight: 900;
}
.topic-title { color: var(--cyan); font-weight: 900; font-size: 20px; flex: 1; }
.chevron { color: var(--muted); font-size: 22px; }
.topic-body { display: none; padding: 0 28px 24px; color: #d8dfec; line-height: 1.7; }
.topic-card.open .topic-body { display: block; }
.note-box {
  padding: 18px 20px;
  background: rgba(3, 5, 10, .72);
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.08);
  white-space: pre-wrap;
}
.topic-actions { margin-top: 14px; display: flex; gap: 10px; }

.slides-layout { display: grid; grid-template-columns: 260px 1fr; gap: 18px; }
.slide-thumbs {
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(17,21,36,.66);
  padding: 14px;
  max-height: 650px;
  overflow: auto;
}
.thumb {
  width: 100%;
  text-align: left;
  margin-bottom: 10px;
  padding: 14px;
  border-radius: 14px;
  background: rgba(255,255,255,.04);
  color: var(--muted);
  border: 1px solid rgba(255,255,255,.08);
}
.thumb.active { color: var(--text); border-color: rgba(50,216,241,.7); background: var(--cyan-soft); }
.thumb strong { display: block; color: var(--cyan); margin-bottom: 4px; }
.slide-editor { display: grid; gap: 18px; }
.slide-canvas {
  min-height: 360px;
  border-radius: 26px;
  border: 1px solid rgba(50,216,241,.28);
  background:
    linear-gradient(135deg, rgba(50,216,241,.12), transparent 45%),
    linear-gradient(145deg, #111524, #181b2f);
  box-shadow: var(--shadow);
  padding: 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.slide-label, .slide-counter { color: var(--cyan); letter-spacing: .22em; font-weight: 900; font-size: 12px; }
.slide-canvas h2 { font-size: clamp(34px, 5vw, 58px); margin: 12px 0; }
.slide-canvas p:not(.slide-label) { color: #d5dcea; font-size: 22px; line-height: 1.55; white-space: pre-wrap; }

.presentation-mode {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: radial-gradient(circle at top left, rgba(50,216,241,.14), transparent 30%), #03050a;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 56px;
}
.presentation-slide {
  width: min(1200px, 90vw);
  min-height: 68vh;
  border-radius: 34px;
  border: 1px solid rgba(50,216,241,.34);
  background: linear-gradient(145deg, rgba(17,21,36,.95), rgba(25,28,48,.93));
  box-shadow: var(--shadow);
  padding: 72px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.presentation-slide h1 { font-size: clamp(46px, 7vw, 92px); line-height: 1; margin: 12px 0 24px; }
.presentation-slide p:not(.slide-counter) { color: #d9e0ed; font-size: clamp(24px, 3vw, 42px); line-height: 1.4; white-space: pre-wrap; }
.exit-btn { position: fixed; top: 24px; right: 24px; background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(255,139,139,.35); border-radius: 999px; padding: 12px 18px; }
.presentation-controls { position: fixed; bottom: 24px; display: flex; gap: 16px; }
.presentation-controls button { background: var(--cyan-soft); color: var(--cyan); border: 1px solid var(--border); border-radius: 999px; padding: 14px 22px; font-weight: 900; }

@media (max-width: 760px) {
  .section-header, .tabs { align-items: stretch; flex-direction: column; }
  .slides-layout { grid-template-columns: 1fr; }
  .presentation-mode { padding: 18px; }
  .presentation-slide { padding: 36px; }
}

/* Updates: completion checkmarks, markdown rendering, fixed presentation slide sizing */
.spotlight-btn {
  position: fixed;
  z-index: 120;
  width: 54px;
  height: 54px;
  border-radius: 999px;
  border: 1px solid rgba(50,216,241,.55);
  background: radial-gradient(circle, rgba(50,216,241,.32), rgba(17,21,36,.92) 68%);
  color: var(--cyan);
  box-shadow: 0 0 0 8px rgba(50,216,241,.06), 0 0 38px rgba(50,216,241,.38);
  font-size: 20px;
  font-weight: 900;
}
.home-spotlight { top: 22px; left: 22px; }
.presentation-spotlight { top: 24px; left: 24px; }

.topic-card.done {
  border-color: rgba(87, 255, 168, .35);
  background: linear-gradient(120deg, rgba(15, 56, 42, .58), rgba(25,28,48,.94));
}
.topic-card.done .topic-title { color: #7cffb7; }
.checkmark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.18);
  color: rgba(255,255,255,.35);
  background: rgba(255,255,255,.04);
  font-weight: 900;
  transition: .18s ease;
}
.checkmark:hover { border-color: rgba(87,255,168,.75); color: #7cffb7; }
.topic-card.done .checkmark {
  color: #061018;
  background: #7cffb7;
  border-color: #7cffb7;
  box-shadow: 0 0 22px rgba(87,255,168,.28);
}
.done-label {
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .12em;
}
.topic-card.done .done-label { color: #7cffb7; }

.markdown-content { color: #d8dfec; }
.markdown-content h1,
.markdown-content h2,
.markdown-content h3 { color: var(--text); margin: 12px 0 8px; line-height: 1.15; }
.markdown-content h1 { font-size: 1.55em; }
.markdown-content h2 { font-size: 1.3em; }
.markdown-content h3 { font-size: 1.1em; color: var(--cyan); }
.markdown-content p { margin: 0 0 12px; }
.markdown-content ul { margin: 0 0 14px 22px; padding: 0; }
.markdown-content li { margin: 7px 0; }
.markdown-content strong { color: var(--text); }
.markdown-content code {
  color: var(--cyan);
  background: rgba(50,216,241,.10);
  border: 1px solid rgba(50,216,241,.14);
  border-radius: 6px;
  padding: 2px 6px;
}
.markdown-content pre {
  margin: 12px 0 16px;
  padding: 16px 18px;
  overflow: auto;
  background: #000;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.08);
}
.markdown-content pre code {
  display: block;
  padding: 0;
  border: 0;
  background: transparent;
  color: #f4f7ff;
}
.markdown-content blockquote {
  margin: 14px 0;
  padding: 14px 18px;
  border-left: 4px solid var(--danger);
  background: rgba(255, 83, 112, .12);
  color: #ffb4b4;
  border-radius: 10px;
}
.markdown-content a { color: var(--cyan); }
.note-box { white-space: normal; }

.slide-canvas { position: relative; min-height: 420px; max-height: 520px; justify-content: flex-start; overflow: hidden; }
.slide-markdown { overflow: auto; padding-right: 8px; font-size: 20px; line-height: 1.55; }
.slide-canvas p:not(.slide-label) { white-space: normal; }
.slide-number {
  position: absolute;
  right: 24px;
  bottom: 20px;
  display: grid;
  place-items: center;
  min-width: 38px;
  height: 38px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(50,216,241,.12);
  border: 1px solid rgba(50,216,241,.35);
  color: var(--cyan);
  font-weight: 900;
}

.presentation-mode {
  align-items: flex-start;
  padding: 72px 56px 120px;
  overflow: hidden;
}
.presentation-slide {
  position: relative;
  width: min(1200px, 90vw);
  height: min(680px, calc(100vh - 220px));
  min-height: 520px;
  padding: 58px 72px 76px;
  justify-content: flex-start;
  overflow: hidden;
}
.presentation-slide h1 {
  font-size: clamp(40px, 5vw, 76px);
  margin: 0 0 24px;
}
.presentation-markdown {
  overflow: auto;
  padding-right: 14px;
  font-size: clamp(20px, 2.2vw, 34px);
  line-height: 1.38;
}
.presentation-slide p:not(.slide-counter) { white-space: normal; }
.presentation-number { right: 28px; bottom: 24px; }
.presentation-controls {
  bottom: 36px;
  margin-top: 20px;
}

/* v3: Topic teaching focus mode */
.topics-heading-icon {
  font-size: 30px;
  color: #33b6f7;
  margin-bottom: 4px;
  transition: transform 0.2s ease;
}
.topic-header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.inline-spotlight {
  position: static;
  flex: 0 0 auto;
}
.inline-spotlight.active {
  color: #061018;
  background: #7cffb7;
  border-color: #7cffb7;
  box-shadow: 0 0 0 8px rgba(87,255,168,.08), 0 0 38px rgba(87,255,168,.28);
}
.topics-focus-mode .topic-admin-control,
.topics-focus-mode .topic-actions,
.topics-focus-mode #topicForm {
  display: none !important;
}

/* v3: navigation controls are commented out; keep style ready if you enable later */
.presentation-controls {
  bottom: 28px;
  margin-top: 20px;
}


/* v4: While presenting, hide page-level spotlight buttons so only the presentation shortcut appears. */
body.presenting #quickPresentBtn,
body.presenting #topicsFocusBtn {
  display: none !important;
}
body.presenting .presentation-spotlight,
body.presenting #exitPresentationBtn {
  z-index: 1100;
}

/* v5: editable Daily Topics heading */
.editable-heading-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.icon-edit-btn {
  width: 38px;
  height: 38px;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid rgba(50,216,241,.35);
  background: rgba(50,216,241,.10);
  color: var(--cyan);
  font-weight: 900;
  box-shadow: 0 0 20px rgba(50,216,241,.12);
}
.icon-edit-btn:hover {
  border-color: rgba(50,216,241,.75);
  background: rgba(50,216,241,.18);
}
.topics-focus-mode #topicsHeadingForm {
  display: none !important;
}

/* v7: brand logo badge styled like the circular shortcut icon */
.brand-logo-badge {
  position: fixed;
  top: 22px;
  right: 22px;
  z-index: 120;
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid rgba(50,216,241,.55);
  /* background: radial-gradient(circle, rgba(50,216,241,.32), rgba(17,21,36,.92) 68%); */
  box-shadow: 0 0 0 8px rgba(50,216,241,.06), 0 0 38px rgba(50,216,241,.38);
}
.brand-logo-inner {
  width: 31px;
  height: 31px;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 0 10px rgba(148, 78, 255, .28));
}

.app-footer {
  width: min(1120px, calc(100% - 32px));
  margin: -34px auto 28px;
  padding: 18px 0 0;
  color: var(--muted);
  text-align: center;
  font-weight: 500;
  letter-spacing: .04em;
  border-top: 1px solid rgba(255,255,255,.08);
}

.inline-spotlight,
.inline-spotlight.active {
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid rgba(50,216,241,.35);
  background: rgba(50,216,241,.10);
  color: var(--cyan);
  box-shadow: 0 0 20px rgba(50,216,241,.12);
  font-size: 18px;
}

.inline-spotlight:hover,
.inline-spotlight.active:hover {
  border-color: rgba(50,216,241,.75);
  background: rgba(50,216,241,.18);
}

.inline-spotlight.active::after {
  content: '';
  position: absolute;
  width: 7px;
  height: 7px;
  right: 3px;
  bottom: 3px;
  border-radius: 999px;
  background: #7cffb7;
  box-shadow: 0 0 10px rgba(87,255,168,.65);
}

@media (max-width: 760px) {
  .brand-logo-badge {
    width: 48px;
    height: 48px;
    top: 16px;
    right: 16px;
  }
  .brand-logo-inner {
    width: 28px;
    height: 28px;
  }
}
.inline-spotlight,
.inline-spotlight.active {
  position: relative;
}


/* v9: browser-based pen tablet improvements */
.drawing-spotlight {
  top: 22px;
  left: 88px;
}

.drawing-pad {
  position: fixed;
  inset: 0;
  z-index: 1300;
  display: flex;
  flex-direction: column;
  padding: 20px;
  overflow: auto;
  background:
    radial-gradient(circle at top left, rgba(50, 216, 241, .10), transparent 32%),
    rgba(5, 7, 13, .96);
  backdrop-filter: blur(14px);
}

.drawing-brand-badge {
  position: fixed;
  top: 22px;
  right: 22px;
  z-index: 1320;
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid rgba(50,216,241,.55);
  background: radial-gradient(circle, rgba(50,216,241,.32), rgba(17,21,36,.92) 68%);
  box-shadow: 0 0 0 8px rgba(50,216,241,.06), 0 0 38px rgba(50,216,241,.38);
}

.drawing-brand-badge img {
  width: 31px;
  height: 31px;
  object-fit: contain;
  display: block;
}

.drawing-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  width: calc(100vw - 40px);
  margin: 0 auto 16px;
  padding: 14px 84px 14px 16px;
  border: 1px solid rgba(50,216,241,.22);
  border-radius: 18px;
  background: rgba(17,21,36,.86);
  box-shadow: 0 20px 70px rgba(0,0,0,.35);
}

.drawing-toolbar-left,
.drawing-toolbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.drawing-title {
  color: var(--cyan);
  font-weight: 900;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.color-control,
.range-control,
.stamp-control {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.color-control input {
  width: 42px;
  height: 36px;
  padding: 2px;
  margin: 0;
  border-radius: 12px;
}

.range-control input {
  width: 120px;
  margin: 0;
  padding: 0;
}

.stamp-control select {
  width: 150px;
  margin: 0;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.10);
  background: #03050a;
  color: var(--text);
  outline: none;
}

.tool-btn {
  border: 1px solid rgba(50,216,241,.25);
  border-radius: 999px;
  padding: 10px 14px;
  background: rgba(50,216,241,.10);
  color: var(--cyan);
  font-weight: 900;
}

.tool-btn.active {
  color: #061018;
  background: var(--cyan);
  box-shadow: 0 0 28px rgba(50,216,241,.28);
}

.close-tool {
  border-color: rgba(255,139,139,.28);
  color: var(--danger);
  background: var(--danger-bg);
}

.drawing-canvas-wrap {
  position: relative;
  width: calc(100vw - 40px);
  margin: 0 auto;
}

.drawing-canvas {
  width: 100%;
  height: max(760px, calc(100vh - 124px));
  display: block;
  border: 1px solid rgba(50,216,241,.24);
  border-radius: 24px;
  background: rgba(255,255,255,.98);
  box-shadow: 0 24px 80px rgba(0,0,0,.48);
  touch-action: none;
  cursor: crosshair;
}

.drawing-pad.dark-board .drawing-canvas {
  background: #070b13;
}

.eraser-cursor {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 1330;
  pointer-events: none;
  border-radius: 999px;
  border: 2px solid rgba(50,216,241,.88);
  background: rgba(50,216,241,.10);
  box-shadow: 0 0 18px rgba(50,216,241,.25);
  transform: translate(-50%, -50%);
}

body.drawing-open #quickPresentBtn,
body.drawing-open #openDrawingBtn,
body.drawing-open > .brand-logo-badge {
  display: none !important;
}

body.presenting #openDrawingBtn {
  display: none !important;
}

body.presenting .brand-logo-badge {
  z-index: 1100;
  display: grid !important;
}

@media (max-width: 760px) {
  .drawing-spotlight {
    left: 76px;
  }
  .drawing-pad {
    padding: 12px;
  }
  .drawing-toolbar,
  .drawing-canvas-wrap {
    width: calc(100vw - 24px);
  }
  .drawing-toolbar {
    padding-right: 16px;
    margin-top: 58px;
  }
  .drawing-canvas {
    height: max(680px, calc(100vh - 184px));
    border-radius: 18px;
  }
  .drawing-brand-badge {
    width: 48px;
    height: 48px;
    top: 16px;
    right: 16px;
  }
  .drawing-brand-badge img {
    width: 28px;
    height: 28px;
  }
}


/* v10: refined Pen Tablet controls, cursor, text typing, and long scroll canvas */
.drawing-pad {
  padding: 14px 0 0;
  overflow-y: auto;
  overflow-x: hidden;
}

.drawing-pad.light-board {
  background:
    radial-gradient(circle at top left, rgba(129, 140, 248, .12), transparent 30%),
    #f8fafc;
}

.drawing-pad.dark-board {
  background:
    radial-gradient(circle at top left, rgba(50, 216, 241, .10), transparent 32%),
    #05070d;
}

.drawing-brand-badge {
  display: none !important;
}

.drawing-toolbar {
  position: sticky;
  top: 0;
  z-index: 6;
  width: calc(100vw - 28px);
  margin: 0 auto 14px;
  border-radius: 18px;
}

.drawing-canvas-wrap {
  position: relative;
  width: 100vw;
  min-height: 1000vh;
  height: 1000vh;
  margin: 0;
  border-radius: 0;
  overflow: visible;
}

.drawing-canvas {
  display: block;
  width: 100vw;
  height: 1000vh;
  border-radius: 0;
  cursor: none;
  touch-action: none;
}

.icon-tool {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid rgba(50,216,241,.32);
  background: rgba(50,216,241,.10);
  color: var(--cyan);
  box-shadow: 0 0 18px rgba(50,216,241,.10);
  font-size: 17px;
  font-weight: 900;
}

.icon-tool:hover,
.icon-tool.active {
  border-color: rgba(50,216,241,.76);
  background: rgba(50,216,241,.20);
  box-shadow: 0 0 0 7px rgba(50,216,241,.055), 0 0 24px rgba(50,216,241,.20);
}

.close-tool {
  color: var(--danger);
  border-color: rgba(255,139,139,.35);
  background: rgba(255,83,112,.12);
}

.icon-color-control {
  flex-direction: row;
  align-items: center;
  gap: 8px;
}

.icon-color-control input[type="color"] {
  width: 36px;
  height: 36px;
  padding: 3px;
  border-radius: 999px;
}

.stamp-control select {
  min-width: 138px;
}

.drawing-cursor {
  position: absolute;
  z-index: 8;
  pointer-events: none;
  transform: translate(-50%, -50%);
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 26px;
  line-height: 1;
}

.drawing-cursor.eraser-cursor {
  border: 2px solid rgba(255,255,255,.85);
  border-radius: 999px;
}

.drawing-cursor.pen-cursor {
  font-size: 30px;
  text-shadow: 0 0 12px rgba(50,216,241,.32);
}

.drawing-cursor.text-cursor {
  font-family: Georgia, serif;
  font-weight: 900;
}

.drawing-text-box {
  position: absolute;
  z-index: 9;
  min-width: 260px;
  min-height: 76px;
  padding: 10px 12px;
  border: 1px dashed rgba(50,216,241,.75);
  border-radius: 12px;
  background: rgba(5,7,13,.78);
  outline: none;
  resize: both;
  box-shadow: 0 16px 34px rgba(0,0,0,.28);
  font-family: Inter, Arial, sans-serif;
  font-weight: 700;
}

.light-board .drawing-text-box {
  background: rgba(255,255,255,.88);
  color: #111827;
}

body.presenting .brand-logo-badge {
  z-index: 1100;
  display: grid !important;
}

@media (max-width: 760px) {
  .drawing-toolbar {
    width: calc(100vw - 18px);
  }

  .icon-tool {
    width: 38px;
    height: 38px;
  }
}

/* v11: Pen Tablet fixes */
.drawing-pad.light-board,
.drawing-canvas-wrap.light-board {
  background-color: #ffffff;
  background-image:
    radial-gradient(circle at top left, rgba(129, 140, 248, .10), transparent 30%),
    linear-gradient(rgba(15,23,42,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15,23,42,.055) 1px, transparent 1px);
  background-size: auto, 48px 48px, 48px 48px;
}

.drawing-pad.dark-board,
.drawing-canvas-wrap.dark-board {
  background-color: #05070d;
  background-image:
    radial-gradient(circle at top left, rgba(50,216,241,.10), transparent 32%),
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: auto, 48px 48px, 48px 48px;
}

.icon-color-control {
  width: 42px;
  height: 42px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid rgba(50,216,241,.32);
  background: transparent;
  overflow: hidden;
}

.icon-color-control span {
  display: none;
}

.icon-color-control input[type="color"] {
  width: 52px;
  height: 52px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
}

.icon-color-control input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

.icon-color-control input[type="color"]::-webkit-color-swatch {
  border: 0;
  border-radius: 999px;
}

.icon-color-control input[type="color"]::-moz-color-swatch {
  border: 0;
  border-radius: 999px;
}

.drawing-cursor.pen-cursor {
  transform-origin: center;
}

.drawing-text-box {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 8px;
  align-items: start;
  min-width: 260px;
  min-height: 70px;
  padding: 8px;
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  resize: both;
  overflow: auto;
}

.drawing-text-box.editing,
.drawing-text-box:hover {
  border-color: rgba(50,216,241,.75);
  background: rgba(5,7,13,.10);
  box-shadow: 0 16px 34px rgba(0,0,0,.14);
}

.light-board .drawing-text-box.editing,
.light-board .drawing-text-box:hover {
  background: rgba(255,255,255,.68);
}

.dark-board .drawing-text-box.editing,
.dark-board .drawing-text-box:hover {
  background: rgba(5,7,13,.50);
}

.text-drag-handle {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(50,216,241,.35);
  border-radius: 999px;
  background: rgba(50,216,241,.12);
  color: var(--cyan);
  cursor: move;
  opacity: 0;
  transition: opacity .16s ease;
}

.drawing-text-box.editing .text-drag-handle,
.drawing-text-box:hover .text-drag-handle {
  opacity: 1;
}

.text-editor {
  min-height: 42px;
  outline: none;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  cursor: text;
}

.text-editor:empty::before {
  content: attr(data-placeholder);
  color: rgba(141,149,168,.70);
}

.light-board .drawing-text-box {
  color: #111827;
}

.dark-board .drawing-text-box {
  color: #ffffff;
}


/* v12: Dark-only Pen Tablet fixes */
.drawing-pad,
.drawing-pad.dark-board,
.drawing-canvas-wrap,
.drawing-canvas-wrap.dark-board {
  background:
    radial-gradient(circle at top left, rgba(50, 216, 241, .10), transparent 32%),
    #05070d !important;
}

.drawing-canvas,
.drawing-pad.dark-board .drawing-canvas {
  background: transparent !important;
}

.drawing-text-box,
.dark-board .drawing-text-box {
  background: rgba(5,7,13,.78) !important;
  color: #ffffff;
}

.drawing-cursor.pen-cursor i {
  transform: rotate(225deg);
  transform-origin: center;
}

/* v13: pure black writing board and adjusted pen cursor direction */
.drawing-pad,
.drawing-pad.dark-board,
.drawing-canvas-wrap,
.drawing-canvas-wrap.dark-board {
  background: #000000 !important;
}

.drawing-canvas,
.drawing-pad.dark-board .drawing-canvas {
  background: #000000 !important;
}

.drawing-cursor.pen-cursor i {
  transform: rotate(135deg) !important;
  transform-origin: center;
}


/* v14: exact pen cursor and text tool symbol fixes */
.text-tool-symbol {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 18px;
  line-height: 1;
}

.drawing-cursor.pen-cursor i {
  transform: rotate(315deg) !important;
  transform-origin: center;
}


/* v15: horizontal scrolling + pen head points right */
.drawing-pad {
  overflow-x: auto !important;
  overflow-y: auto !important;
}

.drawing-canvas-wrap {
  width: max(300vw, 3600px) !important;
  min-width: max(300vw, 3600px) !important;
}

.drawing-canvas {
  width: max(300vw, 3600px) !important;
}

.drawing-toolbar {
  min-width: 980px;
}

.drawing-cursor.pen-cursor i {
  transform: rotate(135deg) !important;
  transform-origin: center;
}


/* v16: Pen cursor direction matches the reference screenshot.
   Pen body runs from bottom-left to top-right, with the head/cap at top-right. */
.drawing-cursor.pen-cursor i,
#penModeBtn .fa-pen {
  transform: rotate(0deg) !important;
  transform-origin: center;
}


/* v17: Align pen cursor nib with the actual drawing point.
   The drawing starts from the bottom-left pen nib, not the middle of the icon. */
.drawing-cursor.pen-cursor {
  transform: translate(0, -100%) !important;
  transform-origin: bottom left;
}

/* v18: keep Pen Tablet toolbar sticky during both vertical and horizontal scrolling */
.drawing-pad {
  position: fixed;
  overflow: auto !important;
}

.drawing-toolbar {
  position: sticky !important;
  top: 0 !important;
  left: 0 !important;
  z-index: 1500 !important;
  width: 100vw !important;
  min-width: 100vw !important;
  max-width: none !important;
  box-sizing: border-box;
}

.drawing-canvas-wrap {
  position: relative;
}


/* v20: text tool refinements */
.drawing-text-box {
  font-size: 16px;
}
.drawing-text-box.editing {
  outline: 1px solid rgba(50,216,241,.72);
}
.text-editor {
  caret-color: currentColor;
}


/* v21: thinner/tighter text boxes + full-circle color picker + white default color */
.icon-color-control {
  position: relative !important;
  width: 42px !important;
  height: 42px !important;
  min-width: 42px !important;
  padding: 0 !important;
  border-radius: 999px !important;
  border: 1px solid rgba(50,216,241,.38) !important;
  background: #ffffff !important;
  overflow: hidden !important;
  box-shadow: 0 0 18px rgba(50,216,241,.10) !important;
}
.icon-color-control input[type="color"] {
  position: absolute !important;
  inset: -8px !important;
  width: 58px !important;
  height: 58px !important;
  padding: 0 !important;
  margin: 0 !important;
  border: 0 !important;
  border-radius: 999px !important;
  background: transparent !important;
  cursor: pointer !important;
  opacity: 0 !important;
}
.icon-color-control span { display: none !important; }
.drawing-text-box {
  min-width: 44px !important;
  min-height: 24px !important;
  width: fit-content;
  height: fit-content;
  padding: 4px 6px !important;
  border: 1px solid transparent !important;
  border-radius: 6px !important;
  resize: both !important;
  overflow: auto !important;
  grid-template-columns: 18px minmax(24px, 1fr) !important;
  gap: 4px !important;
}
.drawing-text-box.editing,
.drawing-text-box:hover {
  border: 1px solid rgba(50,216,241,.72) !important;
}
.text-drag-handle {
  width: 16px !important;
  height: 16px !important;
  font-size: 10px !important;
}
.text-editor {
  min-width: 24px !important;
  min-height: 18px !important;
  line-height: 1.2 !important;
}

/* v22: hide text resize handle after writing; show only on hover/focus/editing */
.drawing-text-box {
  resize: none !important;
  overflow: visible !important;
}
.drawing-text-box:hover,
.drawing-text-box.editing,
.drawing-text-box:focus-within {
  resize: both !important;
  overflow: auto !important;
}


/* v23: Shape dropdown and clean controls */
.stamp-control { gap: 0; }
.stamp-control select { min-width: 230px; width: 230px; }
.range-only { gap: 0; }
.range-only input[type="range"] { width: 132px; }

/* v24: movable/resizable shape objects */
.drawing-shape {
  position: absolute;
  z-index: 9;
  display: inline-grid;
  place-items: center;
  color: #ffffff;
  border: 0;
  background: transparent;
  font-family: Inter, Arial, sans-serif;
  font-weight: 900;
  text-align: center;
  line-height: 1.05;
  user-select: none;
  touch-action: none;
  cursor: pointer;
  padding: 2px;
}
.drawing-shape.selected,
.drawing-shape:hover {
  outline: 1px dashed rgba(50,216,241,.78);
  outline-offset: 5px;
}
.drawing-shape.shape-circle {
  border: 3px solid currentColor;
  border-radius: 999px;
}
.drawing-shape.shape-box {
  border: 3px solid currentColor;
}
.drawing-shape.shape-rounded-box {
  border: 3px solid currentColor;
  border-radius: 12px;
}
.drawing-shape.shape-line::before {
  content: '';
  width: 100%;
  height: 3px;
  background: currentColor;
  display: block;
}
.drawing-shape.shape-arrow,
.drawing-shape.shape-both-arrow {
  font-family: Arial, sans-serif;
  line-height: .8;
}
.drawing-shape.shape-cloud {
  font-family: Arial, sans-serif;
}
.drawing-shape.shape-database {
  border: 3px solid currentColor;
  border-radius: 50% / 18%;
}
.drawing-shape.shape-server,
.drawing-shape.shape-computer {
  border: 3px solid currentColor;
  border-radius: 4px;
}
.drawing-cursor.move-cursor {
  transform: translate(-50%, -50%);
  color: var(--cyan);
  border: 0;
  background: transparent;
}

/* v25: cleaner shape selection and scalable architecture icons */
.drawing-shape.selected {
  outline: none !important;
}
.drawing-shape:hover,
.drawing-shape.selected:hover {
  outline: 1px dashed rgba(50,216,241,.78) !important;
  outline-offset: 5px;
}
.drawing-shape svg {
  width: 100%;
  height: 100%;
  display: block;
  overflow: visible;
  pointer-events: none;
}
.drawing-shape.shape-circle,
.drawing-shape.shape-box,
.drawing-shape.shape-rounded-box,
.drawing-shape.shape-database,
.drawing-shape.shape-server,
.drawing-shape.shape-computer {
  border: 0 !important;
  border-radius: 0 !important;
}
.stamp-control select {
  min-width: 250px;
  width: 250px;
}
.range-only input[type="range"] {
  width: min(24vw, 260px);
}


/* v26: Allow pen/eraser drawing over shapes and keep SVG strokes clean while resizing */
.drawing-canvas-wrap.pen-mode .drawing-shape,
.drawing-canvas-wrap.eraser-mode .drawing-shape,
.drawing-canvas-wrap.text-mode .drawing-shape,
.drawing-pad.pen-mode .drawing-shape,
.drawing-pad.eraser-mode .drawing-shape,
.drawing-pad.text-mode .drawing-shape {
  pointer-events: none;
}

.drawing-canvas-wrap.move-mode .drawing-shape,
.drawing-canvas-wrap.stamp-mode .drawing-shape,
.drawing-pad.move-mode .drawing-shape,
.drawing-pad.stamp-mode .drawing-shape {
  pointer-events: auto;
}

.drawing-shape svg *,
.drawing-shape svg path,
.drawing-shape svg circle,
.drawing-shape svg rect,
.drawing-shape svg ellipse,
.drawing-shape svg line,
.drawing-shape svg polyline,
.drawing-shape svg polygon {
  vector-effect: non-scaling-stroke;
}


/* v26 + shape padding fix: keep shape-to-selection-border padding fixed at 10px */
.drawing-shape {
  padding: 10px !important;
  box-sizing: border-box !important;
}
.drawing-shape svg {
  width: 100% !important;
  height: 100% !important;
}
.drawing-shape:hover,
.drawing-shape.selected:hover {
  outline-offset: 0 !important;
}

/* v29: manual shape resizing handles */
.drawing-shape {
  position: absolute;
}
.shape-art {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  pointer-events: none;
}
.shape-art svg {
  width: 100% !important;
  height: 100% !important;
}
.shape-resize-handle {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  border: 1px solid rgba(6, 16, 24, .9);
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(50,216,241,.45);
  opacity: 0;
  pointer-events: none;
  z-index: 4;
}
.drawing-canvas-wrap.move-mode .drawing-shape:hover .shape-resize-handle,
.drawing-pad.move-mode .drawing-shape:hover .shape-resize-handle {
  opacity: 1;
  pointer-events: auto;
}
.handle-nw { left: -5px; top: -5px; cursor: nwse-resize; }
.handle-n { left: 50%; top: -5px; transform: translateX(-50%); cursor: ns-resize; }
.handle-ne { right: -5px; top: -5px; cursor: nesw-resize; }
.handle-e { right: -5px; top: 50%; transform: translateY(-50%); cursor: ew-resize; }
.handle-se { right: -5px; bottom: -5px; cursor: nwse-resize; }
.handle-s { left: 50%; bottom: -5px; transform: translateX(-50%); cursor: ns-resize; }
.handle-sw { left: -5px; bottom: -5px; cursor: nesw-resize; }
.handle-w { left: -5px; top: 50%; transform: translateY(-50%); cursor: ew-resize; }


/* v30: independent width/height resizing for actual SVG shapes */
.drawing-shape .shape-art {
  width: 100% !important;
  height: 100% !important;
  overflow: visible;
}
.drawing-shape .shape-art svg {
  width: 100% !important;
  height: 100% !important;
  preserve-aspect-ratio: none;
}


/* v31: corrected independent resize so the actual SVG follows side handles */
.drawing-shape {
  display: block !important;
  padding: 10px !important;
  box-sizing: border-box !important;
}
.drawing-shape .shape-art {
  position: absolute !important;
  left: 10px !important;
  top: 10px !important;
  right: auto !important;
  bottom: auto !important;
  display: block !important;
  overflow: visible !important;
  pointer-events: none !important;
}
.drawing-shape .shape-art svg {
  width: 100% !important;
  height: 100% !important;
  display: block !important;
}


/* v33: show shape border and resize dots only on hover, not just selection */
.drawing-shape.selected {
  outline: none !important;
}
.drawing-shape.selected .shape-resize-handle {
  opacity: 0 !important;
  pointer-events: none !important;
}
.drawing-canvas-wrap.move-mode .drawing-shape:hover .shape-resize-handle,
.drawing-pad.move-mode .drawing-shape:hover .shape-resize-handle {
  opacity: 1 !important;
  pointer-events: auto !important;
}
.drawing-shape:hover,
.drawing-shape.selected:hover {
  outline: 1px dashed rgba(50,216,241,.78) !important;
  outline-offset: 0 !important;
}


/* v34: Slide title/body color controls */
.slide-color-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(180px, 1fr));
  gap: 14px;
  margin: 4px 0 18px;
}
.color-control {
  margin-bottom: 0;
}
.color-control input[type="color"] {
  width: 100%;
  height: 46px;
  padding: 4px;
  border-radius: 14px;
  cursor: pointer;
}
#previewBody,
#previewBody p,
#previewBody li,
#previewBody blockquote,
#previewBody h1,
#previewBody h2,
#previewBody h3,
#presentationBody,
#presentationBody p,
#presentationBody li,
#presentationBody blockquote,
#presentationBody h1,
#presentationBody h2,
#presentationBody h3 {
  color: var(--slide-body-color, inherit);
}
@media (max-width: 760px) {
  .slide-color-controls { grid-template-columns: 1fr; }
}

/* v35: imported image/GIF objects on Pen Tablet */
.hidden-file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.drawing-image {
  position: absolute;
  z-index: 8;
  display: block;
  box-sizing: border-box;
  background: transparent;
  user-select: none;
  touch-action: none;
  cursor: pointer;
}

.drawing-image img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: fill;
  pointer-events: none;
  user-select: none;
}

.drawing-image:hover,
.drawing-image.selected:hover {
  outline: 1px dashed rgba(50,216,241,.78);
  outline-offset: 0;
}

.image-resize-handle {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  border: 1px solid rgba(6, 16, 24, .9);
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(50,216,241,.45);
  opacity: 0;
  pointer-events: none;
  z-index: 4;
}

.drawing-canvas-wrap.move-mode .drawing-image:hover .image-resize-handle,
.drawing-pad.move-mode .drawing-image:hover .image-resize-handle {
  opacity: 1;
  pointer-events: auto;
}

.drawing-canvas-wrap.pen-mode .drawing-image,
.drawing-canvas-wrap.eraser-mode .drawing-image,
.drawing-canvas-wrap.text-mode .drawing-image,
.drawing-pad.pen-mode .drawing-image,
.drawing-pad.eraser-mode .drawing-image,
.drawing-pad.text-mode .drawing-image {
  pointer-events: none;
}

.drawing-canvas-wrap.move-mode .drawing-image,
.drawing-canvas-wrap.stamp-mode .drawing-image,
.drawing-pad.move-mode .drawing-image,
.drawing-pad.stamp-mode .drawing-image {
  pointer-events: auto;
}

/* v36: dynamic connector arrows for board objects */
.drawing-connectors-svg {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 7;
  overflow: visible;
  pointer-events: none;
}
.drawing-canvas-wrap.connector-mode .drawing-shape,
.drawing-canvas-wrap.connector-mode .drawing-image,
.drawing-canvas-wrap.connector-mode .drawing-text-box,
.drawing-pad.connector-mode .drawing-shape,
.drawing-pad.connector-mode .drawing-image,
.drawing-pad.connector-mode .drawing-text-box {
  pointer-events: auto;
}
.drawing-canvas-wrap.connector-mode .drawing-shape,
.drawing-canvas-wrap.connector-mode .drawing-image,
.drawing-canvas-wrap.connector-mode .drawing-text-box {
  cursor: crosshair;
}
.connector-source {
  outline: 2px solid rgba(124,255,183,.95) !important;
  outline-offset: 4px !important;
  box-shadow: 0 0 22px rgba(124,255,183,.25);
}
.drawing-cursor.connector-cursor {
  font-size: 30px;
  font-weight: 900;
  text-shadow: 0 0 12px rgba(50,216,241,.35);
}

/* v37: colorful AWS shape icons keep their AWS-style tile colors instead of currentColor-only outlines */
.drawing-shape .aws-color-icon {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}
.drawing-shape .aws-color-icon * {
  vector-effect: non-scaling-stroke;
}


/* v38: cleaner toolbar and more reliable connector selection */
.pen-size-control {
  gap: 0;
}
.pen-size-control input[type="range"] {
  width: 150px;
}
.drawing-canvas-wrap.connector-mode .drawing-shape,
.drawing-canvas-wrap.connector-mode .drawing-image,
.drawing-canvas-wrap.connector-mode .drawing-text-box,
.drawing-pad.connector-mode .drawing-shape,
.drawing-pad.connector-mode .drawing-image,
.drawing-pad.connector-mode .drawing-text-box {
  pointer-events: auto !important;
}
.drawing-connectors-svg path.connector-path {
  pointer-events: none;
}


/* v40: selectable connector arrows and smaller arrowheads */
.drawing-canvas-wrap.move-mode .drawing-connectors-svg,
.drawing-pad.move-mode .drawing-connectors-svg {
  pointer-events: auto;
}
.drawing-canvas-wrap.pen-mode .drawing-connectors-svg,
.drawing-canvas-wrap.eraser-mode .drawing-connectors-svg,
.drawing-canvas-wrap.text-mode .drawing-connectors-svg,
.drawing-canvas-wrap.stamp-mode .drawing-connectors-svg,
.drawing-canvas-wrap.connector-mode .drawing-connectors-svg,
.drawing-pad.pen-mode .drawing-connectors-svg,
.drawing-pad.eraser-mode .drawing-connectors-svg,
.drawing-pad.text-mode .drawing-connectors-svg,
.drawing-pad.stamp-mode .drawing-connectors-svg,
.drawing-pad.connector-mode .drawing-connectors-svg {
  pointer-events: none;
}
.drawing-canvas-wrap.move-mode .connector-hit,
.drawing-pad.move-mode .connector-hit {
  pointer-events: stroke;
  cursor: pointer;
}
.connector-path.selected {
  filter: drop-shadow(0 0 7px rgba(50,216,241,.95));
  stroke-dasharray: 8 6;
}

/* v42: Pen Tablet page selector */
.drawing-page-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-right: 8px;
}
.drawing-page-control select {
  min-width: 170px;
  max-width: 240px;
  height: 42px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid rgba(50,216,241,.35);
  background: rgba(10,14,24,.96);
  color: var(--text);
  font-weight: 800;
  outline: none;
  box-shadow: 0 0 20px rgba(50,216,241,.10);
}
.drawing-page-control select:focus {
  border-color: rgba(50,216,241,.8);
}
.drawing-page-control .page-tool {
  width: 42px;
  height: 42px;
  font-weight: 900;
}
@media (max-width: 760px) {
  .drawing-page-control {
    width: 100%;
    order: -1;
  }
  .drawing-page-control select {
    flex: 1;
    min-width: 0;
  }
}


/* v43: compact single-line Pen Tablet toolbar */
.drawing-toolbar {
  flex-wrap: nowrap !important;
  justify-content: flex-start !important;
  align-items: center !important;
  gap: 10px !important;
  overflow-x: auto !important;
  overflow-y: hidden !important;
  scrollbar-width: thin;
  padding: 10px 14px !important;
  width: calc(100vw - 40px) !important;
  min-width: calc(100vw - 40px) !important;
}

.drawing-toolbar-left,
.drawing-toolbar-actions {
  flex-wrap: nowrap !important;
  align-items: center !important;
  gap: 8px !important;
  flex: 0 0 auto;
}

.drawing-toolbar-left {
  min-width: max-content;
}

.drawing-toolbar-actions {
  margin-left: auto;
  min-width: max-content;
}

.drawing-title {
  display: none !important;
}

.drawing-toolbar-logo {
  width: 42px;
  height: 42px;
  min-width: 42px;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid rgba(50,216,241,.55);
  background: radial-gradient(circle, rgba(50,216,241,.32), rgba(17,21,36,.92) 68%);
  box-shadow: 0 0 0 6px rgba(50,216,241,.05), 0 0 24px rgba(50,216,241,.25);
}

.drawing-toolbar-logo img {
  width: 25px;
  height: 25px;
  object-fit: contain;
  display: block;
}

.pen-size-control input[type="range"] {
  width: 84px !important;
}

.range-only input[type="range"],
.stamp-size-control input[type="range"] {
  width: 104px !important;
}

.stamp-control select {
  width: 190px !important;
  min-width: 190px !important;
  padding: 8px 10px !important;
}

.drawing-page-control select {
  width: 150px !important;
  min-width: 150px !important;
}

.icon-tool,
.page-tool,
.icon-color-control {
  flex: 0 0 auto;
}

@media (max-width: 980px) {
  .drawing-toolbar {
    width: calc(100vw - 24px) !important;
    min-width: calc(100vw - 24px) !important;
    padding: 10px 12px !important;
  }
  .drawing-toolbar-actions {
    margin-left: 0;
  }
}


/* v44: keep toolbar icon circles fully visible */
.drawing-toolbar {
  align-items: center !important;
  overflow-y: visible !important;
  padding-top: 12px !important;
  padding-bottom: 12px !important;
  min-height: 64px !important;
}

.icon-tool,
.page-tool,
.icon-color-control,
.drawing-toolbar-logo {
  width: 44px !important;
  height: 44px !important;
  min-width: 44px !important;
  min-height: 44px !important;
  padding: 0 !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  border-radius: 999px !important;
  line-height: 1 !important;
  box-sizing: border-box !important;
  vertical-align: middle !important;
  overflow: visible !important;
}

.icon-tool i,
.page-tool i,
.icon-tool .text-tool-symbol,
.page-tool .text-tool-symbol,
.close-tool,
.icon-color-control input[type="color"] {
  line-height: 1 !important;
}

.drawing-toolbar-logo img {
  width: 26px !important;
  height: 26px !important;
}

.icon-color-control input[type="color"] {
  inset: -7px !important;
  width: 58px !important;
  height: 58px !important;
}


/* v45: allow pen/eraser drawing visibly over imported images by keeping the canvas above board objects only while drawing */
.drawing-canvas-wrap {
  position: relative !important;
}

.drawing-canvas {
  position: absolute !important;
  left: 0 !important;
  top: 0 !important;
  z-index: 20 !important;
  background: transparent !important;
}

.drawing-canvas-wrap.pen-mode .drawing-canvas,
.drawing-canvas-wrap.eraser-mode .drawing-canvas,
.drawing-pad.pen-mode .drawing-canvas,
.drawing-pad.eraser-mode .drawing-canvas {
  pointer-events: auto !important;
}

.drawing-canvas-wrap.move-mode .drawing-canvas,
.drawing-canvas-wrap.text-mode .drawing-canvas,
.drawing-canvas-wrap.stamp-mode .drawing-canvas,
.drawing-canvas-wrap.connector-mode .drawing-canvas,
.drawing-pad.move-mode .drawing-canvas,
.drawing-pad.text-mode .drawing-canvas,
.drawing-pad.stamp-mode .drawing-canvas,
.drawing-pad.connector-mode .drawing-canvas {
  pointer-events: none !important;
}

.drawing-shape,
.drawing-image,
.drawing-text-box,
.drawing-connectors-svg {
  z-index: 8;
}


/* v46: fix imported image/GIF visibility while keeping pen strokes above objects.
   This must override the older dark-board canvas background rule with equal/higher specificity. */
.drawing-pad.dark-board .drawing-canvas,
.drawing-canvas-wrap.dark-board .drawing-canvas,
.drawing-canvas {
  background: transparent !important;
}


/* v47: keep custom pen/eraser cursor visible above imported images and the drawing canvas */
.drawing-cursor,
.drawing-cursor.pen-cursor,
.drawing-cursor.eraser-cursor {
  z-index: 60 !important;
  pointer-events: none !important;
}

.drawing-canvas-wrap.pen-mode .drawing-cursor,
.drawing-canvas-wrap.eraser-mode .drawing-cursor,
.drawing-pad.pen-mode .drawing-cursor,
.drawing-pad.eraser-mode .drawing-cursor {
  display: grid !important;
}

.drawing-cursor.eraser-cursor {
  background: rgba(5, 7, 13, .18) !important;
  box-shadow: 0 0 0 1px rgba(0,0,0,.45), 0 0 14px rgba(255,255,255,.32) !important;
}

.drawing-cursor.pen-cursor {
  filter: drop-shadow(0 0 6px rgba(0,0,0,.75)) drop-shadow(0 0 10px rgba(50,216,241,.28));
}


/* v49: restore text/stamp placement while keeping pen/eraser strokes above images.
   Canvas only moves above images in pen/eraser mode. In text/stamp mode it stays behind objects but still receives blank-board clicks. */
.drawing-canvas {
  z-index: 1 !important;
  pointer-events: auto !important;
  background: transparent !important;
}

.drawing-canvas-wrap.pen-mode .drawing-canvas,
.drawing-canvas-wrap.eraser-mode .drawing-canvas,
.drawing-pad.pen-mode .drawing-canvas,
.drawing-pad.eraser-mode .drawing-canvas {
  z-index: 20 !important;
  pointer-events: auto !important;
}

.drawing-canvas-wrap.text-mode .drawing-canvas,
.drawing-canvas-wrap.stamp-mode .drawing-canvas,
.drawing-pad.text-mode .drawing-canvas,
.drawing-pad.stamp-mode .drawing-canvas {
  z-index: 1 !important;
  pointer-events: auto !important;
}

.drawing-canvas-wrap.move-mode .drawing-canvas,
.drawing-canvas-wrap.connector-mode .drawing-canvas,
.drawing-pad.move-mode .drawing-canvas,
.drawing-pad.connector-mode .drawing-canvas {
  z-index: 1 !important;
  pointer-events: none !important;
}

.drawing-text-box {
  z-index: 45 !important;
  pointer-events: auto !important;
}

.drawing-text-box .text-editor {
  pointer-events: auto !important;
}

.drawing-shape,
.drawing-image,
.drawing-connectors-svg {
  z-index: 8;
}

/* v50: multiple Topic/Slide class pages */
.class-page-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px;
  border: 1px solid rgba(50,216,241,.20);
  border-radius: 999px;
  background: rgba(50,216,241,.07);
  box-shadow: 0 0 24px rgba(50,216,241,.08);
}

.class-page-control select {
  min-width: 170px;
  height: 38px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(17,21,36,.92);
  color: var(--text);
  padding: 0 36px 0 14px;
  font-weight: 800;
  outline: none;
}

.class-page-control select:focus {
  border-color: rgba(50,216,241,.72);
  box-shadow: 0 0 0 4px rgba(50,216,241,.10);
}

.mini-page-tool {
  width: 36px !important;
  height: 36px !important;
  min-width: 36px !important;
  min-height: 36px !important;
  font-size: 15px !important;
  padding: 0 !important;
}

.slide-header-actions {
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

@media (max-width: 760px) {
  .class-page-control {
    width: 100%;
    justify-content: stretch;
  }
  .class-page-control select {
    flex: 1;
    min-width: 0;
  }
}


/* v53: home-page background music panel */
.music-tab-btn i {
  margin-right: 6px;
}
.music-panel {
  max-width: 900px;
  margin: 0 auto;
}
.music-panel input[type="url"] {
  width: 100%;
}
.music-actions {
  justify-content: flex-start;
  flex-wrap: wrap;
}
.music-status {
  margin: 14px 0 0;
  color: var(--muted);
  font-weight: 700;
}
.music-status.playing {
  color: #7cffb7;
}
.music-status.error {
  color: var(--danger);
}


/* v54: Music present mode */
.music-panel-topline {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  margin-bottom: 14px;
}
.music-player-only {
  margin-top: 14px;
}
.music-player-only audio {
  display: block;
  width: 100%;
  height: 48px;
}
.music-panel.music-presenting {
  max-width: 760px;
  padding: 28px;
}
.music-panel.music-presenting .music-edit-controls {
  display: none !important;
}
.music-panel.music-presenting .music-panel-topline {
  margin-bottom: 18px;
}
.music-panel.music-presenting .music-status {
  text-align: center;
}


/* v55: slide video support */
.field-hint {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}

.slide-video-preview {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  margin: -6px 0 14px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid rgba(50,216,241,.28);
  background: rgba(50,216,241,.10);
  color: var(--cyan);
  font-weight: 800;
}

.presentation-video-wrap {
  margin-top: 18px;
  border: 1px solid rgba(50,216,241,.28);
  border-radius: 24px;
  background: rgba(3,5,10,.44);
  overflow: hidden;
  box-shadow: 0 18px 45px rgba(0,0,0,.22);
}

.presentation-video-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 12px 10px 16px;
  border-bottom: 1px solid rgba(50,216,241,.18);
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .03em;
}

.video-fullscreen-btn {
  border: 1px solid rgba(50,216,241,.34);
  border-radius: 999px;
  padding: 8px 12px;
  background: rgba(50,216,241,.12);
  color: var(--cyan);
  font-weight: 900;
  cursor: pointer;
}

.presentation-video-host {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
}

.presentation-video-host video,
.presentation-video-host iframe {
  width: 100%;
  height: 100%;
  display: block;
  border: 0;
  background: #000;
}

.presentation-video-host:fullscreen {
  display: grid;
  place-items: center;
  background: #000;
}

.presentation-video-host:fullscreen video,
.presentation-video-host:fullscreen iframe {
  width: 100vw;
  height: 100vh;
}

.presentation-slide:has(.presentation-video-wrap:not(.hidden)) {
  justify-content: flex-start;
}

.presentation-slide:has(.presentation-video-wrap:not(.hidden)) .presentation-markdown {
  max-height: 32%;
}


/* v57: Home page Quiz Timer */
.quiz-timer-panel {
  overflow: hidden;
}

.quiz-timer-layout {
  display: grid;
  grid-template-columns: minmax(280px, 420px) minmax(320px, 1fr);
  gap: 22px;
  align-items: stretch;
}

.quiz-timer-editor {
  display: grid;
  gap: 16px;
}

.quiz-timer-editor input {
  width: 100%;
}

.quiz-timer-actions {
  justify-content: flex-start;
}

.quiz-timer-display {
  min-height: 320px;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 14px;
  padding: 34px;
  border-radius: 24px;
  border: 1px solid rgba(50,216,241,.22);
  background:
    radial-gradient(circle at top left, rgba(129,140,248,.18), transparent 34%),
    radial-gradient(circle at bottom right, rgba(50,216,241,.16), transparent 36%),
    rgba(5,7,13,.58);
  box-shadow: inset 0 0 38px rgba(50,216,241,.055);
  text-align: center;
}

.quiz-timer-status {
  margin: 0;
  color: var(--cyan);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: 13px;
}

.quiz-timer-display h3 {
  margin: 0;
  font-size: clamp(28px, 4vw, 52px);
  line-height: 1;
  background: linear-gradient(to right, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.quiz-timer-message {
  max-width: 720px;
  color: #d8dfec;
  font-size: clamp(18px, 2vw, 28px);
  font-weight: 800;
  animation: quizMessagePulse 1.4s ease-in-out infinite;
}

.quiz-timer-countdown {
  font-size: clamp(64px, 10vw, 150px);
  line-height: .9;
  font-weight: 1000;
  letter-spacing: -.06em;
  color: #ffffff;
  text-shadow: 0 0 28px rgba(50,216,241,.22);
  font-variant-numeric: tabular-nums;
}

.quiz-progress-shell {
  width: min(620px, 100%);
  height: 14px;
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid rgba(50,216,241,.20);
  background: rgba(255,255,255,.08);
}

.quiz-progress-bar {
  width: 100%;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(to right, #818cf8, #22d3ee);
  transition: width .25s linear;
}

.quiz-timer-display.running {
  border-color: rgba(124,255,183,.35);
}

.quiz-timer-display.finished {
  border-color: rgba(255,83,112,.55);
  box-shadow: 0 0 0 8px rgba(255,83,112,.06), inset 0 0 50px rgba(255,83,112,.12);
  animation: quizFinishedFlash .55s ease-in-out infinite alternate;
}

@keyframes quizMessagePulse {
  0%, 100% { transform: translateY(0); opacity: .78; }
  50% { transform: translateY(-3px); opacity: 1; }
}

@keyframes quizFinishedFlash {
  from { transform: scale(1); }
  to { transform: scale(1.012); }
}

@media (max-width: 860px) {
  .quiz-timer-layout {
    grid-template-columns: 1fr;
  }
}


/* v58: Full-page Quiz Timer presentation mode */
.quiz-timer-presentation {
  position: fixed;
  inset: 0;
  z-index: 2400;
  display: grid;
  place-items: center;
  padding: clamp(18px, 3vw, 46px);
  background:
    radial-gradient(circle at 15% 10%, rgba(129,140,248,.22), transparent 34%),
    radial-gradient(circle at 85% 75%, rgba(50,216,241,.18), transparent 38%),
    #03050a;
  color: #ffffff;
}

.quiz-timer-presentation.hidden {
  display: none !important;
}

.quiz-timer-presentation-card {
  width: min(1180px, 96vw);
  min-height: min(760px, 86vh);
  display: grid;
  align-content: center;
  justify-items: center;
  gap: clamp(14px, 2vw, 28px);
  padding: clamp(28px, 5vw, 76px);
  border-radius: 34px;
  border: 1px solid rgba(50,216,241,.30);
  background:
    radial-gradient(circle at top left, rgba(129,140,248,.18), transparent 34%),
    radial-gradient(circle at bottom right, rgba(50,216,241,.18), transparent 38%),
    rgba(17,21,36,.72);
  box-shadow: 0 30px 110px rgba(0,0,0,.55), inset 0 0 60px rgba(50,216,241,.06);
  text-align: center;
}

.quiz-timer-presentation-card h2 {
  margin: 0;
  font-size: clamp(46px, 7vw, 110px);
  line-height: .95;
  background: linear-gradient(to right, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.quiz-timer-presentation .quiz-timer-message {
  font-size: clamp(24px, 3vw, 44px);
}

.quiz-timer-presentation .quiz-timer-countdown {
  font-size: clamp(92px, 16vw, 220px);
}

.quiz-timer-presentation .quiz-progress-shell {
  width: min(820px, 86vw);
  height: 18px;
}

.quiz-present-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.quiz-present-exit {
  position: fixed;
  top: 22px;
  right: 22px;
  z-index: 2410;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(17,21,36,.72);
  color: #ffffff;
  cursor: pointer;
  box-shadow: 0 0 28px rgba(50,216,241,.16);
}

.quiz-present-hint {
  margin: 0;
  color: rgba(216,223,236,.72);
  font-size: 13px;
}


/* v59: Quiz timer presentation logo instead of X exit button */
.quiz-present-logo {
  position: fixed;
  top: 22px;
  right: 22px;
  z-index: 2410;
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid rgba(50,216,241,.55);
  background: radial-gradient(circle, rgba(50,216,241,.32), rgba(17,21,36,.92) 68%);
  box-shadow: 0 0 0 8px rgba(50,216,241,.06), 0 0 38px rgba(50,216,241,.38);
  pointer-events: none;
}

.quiz-present-logo img {
  width: 31px;
  height: 31px;
  object-fit: contain;
  display: block;
}


/* v60: Better quiz presentation timer spacing and bongoDev brand gradient */
.quiz-timer-presentation .quiz-timer-countdown {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(10px, 1.6vw, 28px);
  font-variant-numeric: tabular-nums;
  background: linear-gradient(to right, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: none;
}

.quiz-timer-presentation .timer-number,
.quiz-timer-presentation .timer-separator {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: .9;
}

.quiz-timer-presentation .timer-separator {
  min-width: .24em;
  transform: translateY(-.04em);
}


/* v61: Make quiz timer colon separator visible in presentation mode */
.quiz-timer-presentation .quiz-timer-countdown {
  background: none !important;
  -webkit-background-clip: initial !important;
  background-clip: initial !important;
  color: inherit !important;
}

.quiz-timer-presentation .timer-number,
.quiz-timer-presentation .timer-separator {
  background: linear-gradient(to right, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.quiz-timer-presentation .timer-separator {
  padding: 0 .08em;
  opacity: 1 !important;
}


/* MERN auth/login layer */
body.auth-loading .app-shell,
body.auth-loading .spotlight-btn,
body.auth-loading .brand-logo-badge,
body.auth-locked .app-shell,
body.auth-locked .spotlight-btn,
body.auth-locked .brand-logo-badge,
body.auth-locked .app-footer,
body.auth-locked #drawingPad,
body.auth-locked #presentationOverlay,
body.auth-locked #quizTimerPresentation {
  display: none !important;
}

body.auth-ready #loginPage {
  display: none !important;
}

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px;
  background:
    radial-gradient(circle at 12% 12%, rgba(129,140,248,.26), transparent 34%),
    radial-gradient(circle at 88% 72%, rgba(34,211,238,.22), transparent 38%),
    #03050a;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.login-bg-orb {
  position: absolute;
  width: 360px;
  height: 360px;
  border-radius: 999px;
  filter: blur(18px);
  opacity: .18;
  pointer-events: none;
}

.orb-one {
  left: -110px;
  top: -100px;
  background: #818cf8;
}

.orb-two {
  right: -120px;
  bottom: -100px;
  background: #22d3ee;
}

.login-card {
  width: min(520px, 100%);
  position: relative;
  z-index: 2;
  padding: 34px;
  border-radius: 28px;
  border: 1px solid rgba(50,216,241,.28);
  background: rgba(17,21,36,.78);
  box-shadow: 0 30px 110px rgba(0,0,0,.55), inset 0 0 48px rgba(50,216,241,.06);
  backdrop-filter: blur(20px);
}

.login-brand {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 22px;
}

.login-logo-badge {
  width: 62px;
  height: 62px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid rgba(50,216,241,.55);
  background: radial-gradient(circle, rgba(50,216,241,.32), rgba(17,21,36,.92) 68%);
  box-shadow: 0 0 0 8px rgba(50,216,241,.06), 0 0 38px rgba(50,216,241,.38);
}

.login-logo-badge img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.login-kicker {
  margin: 0 0 4px;
  color: #22d3ee;
  font-weight: 900;
  letter-spacing: .18em;
  text-transform: uppercase;
  font-size: 12px;
}

.login-brand h1 {
  margin: 0;
  font-size: clamp(28px, 4vw, 42px);
  line-height: .98;
  background: linear-gradient(to right, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.login-copy {
  margin: 0 0 24px;
  color: #d8dfec;
  line-height: 1.65;
}

.login-form {
  display: grid;
  gap: 16px;
}

.login-form label {
  display: grid;
  gap: 8px;
  color: #d8dfec;
  font-weight: 800;
}

.login-form input {
  width: 100%;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 16px;
  background: rgba(3,5,10,.72);
  color: #fff;
  padding: 14px 16px;
  outline: none;
}

.login-form input:focus {
  border-color: rgba(34,211,238,.72);
  box-shadow: 0 0 0 4px rgba(34,211,238,.09);
}

.login-submit {
  border: 0;
  border-radius: 16px;
  padding: 14px 18px;
  cursor: pointer;
  color: #061018;
  font-weight: 1000;
  background: linear-gradient(to right, #818cf8, #22d3ee);
  box-shadow: 0 16px 42px rgba(34,211,238,.18);
}

.login-error {
  min-height: 22px;
  margin: 14px 0 0;
  color: #ff8aa0;
  font-weight: 800;
}

.logout-btn {
  position: fixed;
  top: 22px;
  left: 22px;
  z-index: 130;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 999px;
  padding: 10px 14px;
  color: #fff;
  background: rgba(17,21,36,.78);
  cursor: pointer;
  box-shadow: 0 0 24px rgba(50,216,241,.12);
}

body.presenting .logout-btn,
body.drawing-open .logout-btn {
  display: none !important;
}


/* MERN auth performance fix: avoid showing login page while token/session is being checked */
body.auth-loading #loginPage {
  display: none !important;
}

body.auth-loading::before {
  content: "Loading bongoDev Class Companion...";
  position: fixed;
  inset: 0;
  z-index: 99999;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 12% 12%, rgba(129,140,248,.26), transparent 34%),
    radial-gradient(circle at 88% 72%, rgba(34,211,238,.22), transparent 38%),
    #03050a;
  color: #ffffff;
  font-size: clamp(20px, 3vw, 34px);
  font-weight: 1000;
  letter-spacing: -.02em;
}

body.auth-locked #loginPage {
  display: grid !important;
}

body.auth-ready #loginPage {
  display: none !important;
}


/* v64: logo logout + slide public media support */
.logout-btn {
  display: none !important;
}

.logout-logo-trigger,
.brand-logo-badge {
  cursor: pointer;
}

.logout-logo-trigger:hover,
.brand-logo-badge:hover {
  transform: translateY(-1px) scale(1.03);
  box-shadow: 0 0 0 8px rgba(50,216,241,.08), 0 0 42px rgba(50,216,241,.42);
}

.slide-preview-media {
  width: min(100%, 720px);
  margin: 18px auto 0;
  border: 1px solid rgba(50,216,241,.22);
  border-radius: 18px;
  overflow: hidden;
  background: rgba(3,5,10,.42);
  aspect-ratio: 16 / 9;
}

.slide-preview-media img,
.slide-preview-media video,
.slide-preview-media iframe {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  border: 0;
  background: #000;
}

.presentation-video-host img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  background: #000;
}

.presentation-video-host:fullscreen img {
  width: 100vw;
  height: 100vh;
  object-fit: contain;
}


/* v65: Quizer module */
.timer-tab-btn,
#timer,
#quizTimerPresentation {
  display: none !important;
}

.quizer-grid {
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.quizer-sidebar {
  position: sticky;
  top: 18px;
  display: grid;
  gap: 16px;
}

.quizer-sidebar h3,
.quiz-builder-card h3,
.quiz-run-card h3,
.leaderboard-card h3 {
  margin: 0;
}

.quizer-sidebar label,
.quiz-builder-card label,
.student-quiz-card label {
  display: grid;
  gap: 8px;
  color: #d8dfec;
  font-weight: 800;
}

.quizer-sidebar select,
.quiz-builder-card select,
.quiz-builder-card input,
.quiz-share-row input,
.student-quiz-card input {
  width: 100%;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 14px;
  background: rgba(3,5,10,.72);
  color: #fff;
  padding: 12px 14px;
  outline: none;
}

.mini-actions,
.quiz-builder-actions,
.quiz-run-actions,
.quizer-header-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.full-width-btn {
  width: 100%;
  justify-content: center;
}

.quiz-list-panel {
  display: grid;
  gap: 12px;
}

.quiz-list {
  display: grid;
  gap: 10px;
  max-height: 420px;
  overflow: auto;
  padding-right: 4px;
}

.quiz-list-item {
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 16px;
  padding: 12px;
  background: rgba(3,5,10,.44);
  cursor: pointer;
  transition: .2s ease;
}

.quiz-list-item:hover,
.quiz-list-item.active {
  border-color: rgba(34,211,238,.48);
  box-shadow: 0 0 0 4px rgba(34,211,238,.08);
}

.quiz-list-item strong {
  display: block;
  color: #fff;
  margin-bottom: 6px;
}

.quiz-list-item span {
  color: #aab5c8;
  font-size: 13px;
}

.quizer-main {
  display: grid;
  gap: 22px;
}

.quiz-builder-top,
.quiz-run-top,
.leaderboard-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 18px;
}

.quiz-status-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(34,211,238,.28);
  border-radius: 999px;
  padding: 8px 12px;
  color: #22d3ee;
  background: rgba(34,211,238,.07);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: 12px;
}

.quiz-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 14px;
  margin-bottom: 14px;
}

.question-editor-list {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.question-card {
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 18px;
  padding: 16px;
  background: rgba(3,5,10,.38);
}

.question-card-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 12px;
}

.question-card textarea {
  width: 100%;
  min-height: 74px;
  resize: vertical;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 14px;
  background: rgba(3,5,10,.72);
  color: #fff;
  padding: 12px 14px;
  outline: none;
}

.option-row {
  display: grid;
  grid-template-columns: 42px minmax(0,1fr) 120px;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
}

.option-row input[type="text"] {
  width: 100%;
}

.correct-radio {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #d8dfec;
  font-weight: 800;
}

.admin-quiz-timer {
  min-width: 150px;
  text-align: center;
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1;
  font-weight: 1000;
  background: linear-gradient(to right, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-variant-numeric: tabular-nums;
}

.quiz-share-row {
  display: grid;
  grid-template-columns: minmax(0,1fr) auto;
  gap: 12px;
  margin-bottom: 14px;
}

.table-wrap {
  width: 100%;
  overflow: auto;
}

.quiz-table {
  width: 100%;
  border-collapse: collapse;
  color: #d8dfec;
}

.quiz-table th,
.quiz-table td {
  border-bottom: 1px solid rgba(255,255,255,.09);
  padding: 12px 10px;
  text-align: left;
  vertical-align: top;
}

.quiz-table th {
  color: #22d3ee;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.danger-btn {
  border: 1px solid rgba(255,83,112,.36);
  border-radius: 14px;
  padding: 11px 14px;
  color: #fff;
  background: rgba(255,83,112,.16);
  cursor: pointer;
  font-weight: 900;
}

.student-quiz-page {
  position: fixed;
  inset: 0;
  z-index: 5000;
  overflow: auto;
  padding: 34px;
  background:
    radial-gradient(circle at 12% 12%, rgba(129,140,248,.26), transparent 34%),
    radial-gradient(circle at 88% 72%, rgba(34,211,238,.22), transparent 38%),
    #03050a;
}

.student-quiz-card {
  width: min(980px, 100%);
  margin: 0 auto;
  border: 1px solid rgba(50,216,241,.28);
  border-radius: 30px;
  background: rgba(17,21,36,.78);
  box-shadow: 0 30px 110px rgba(0,0,0,.55), inset 0 0 48px rgba(50,216,241,.06);
  padding: clamp(22px, 4vw, 44px);
}

.student-gate {
  display: grid;
  gap: 16px;
}

.quiz-status-text {
  color: #d8dfec;
  font-size: 18px;
  font-weight: 800;
}

.student-question-list {
  display: grid;
  gap: 18px;
  margin: 22px 0;
}

.student-question-card {
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 18px;
  padding: 18px;
  background: rgba(3,5,10,.40);
}

.student-option {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 10px 0;
  color: #e7ecf6;
  font-weight: 700;
}

.student-quiz-result {
  margin-top: 22px;
  border: 1px solid rgba(34,211,238,.28);
  border-radius: 20px;
  padding: 20px;
  color: #fff;
  background: rgba(34,211,238,.08);
  font-size: 20px;
  font-weight: 900;
}

@media (max-width: 980px) {
  .quizer-grid,
  .quiz-form-grid {
    grid-template-columns: 1fr;
  }

  .quizer-sidebar {
    position: static;
  }

  .quiz-share-row {
    grid-template-columns: 1fr;
  }
}


/* v66: modern public student quiz flow */
body.student-quiz-active {
  overflow: hidden;
}

body.student-quiz-active .app-shell,
body.student-quiz-active .app-footer,
body.student-quiz-active #loginPage {
  display: none !important;
}

.student-quiz-modern {
  position: relative;
  overflow: hidden;
}

.student-quiz-modern::before {
  content: "";
  position: absolute;
  inset: -2px;
  pointer-events: none;
  background:
    radial-gradient(circle at 15% 10%, rgba(129,140,248,.22), transparent 32%),
    radial-gradient(circle at 90% 20%, rgba(34,211,238,.16), transparent 28%);
  opacity: .95;
}

.student-quiz-modern > * {
  position: relative;
  z-index: 1;
}

.student-quiz-hero {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 26px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255,255,255,.10);
}

.student-quiz-hero h1 {
  margin: 0;
  font-size: clamp(30px, 4vw, 56px);
  line-height: .98;
  letter-spacing: -.04em;
  color: #fff;
}

.student-quiz-subtitle {
  margin: 8px 0 0;
  color: #aab5c8;
  font-weight: 750;
}

.student-entry-card {
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 24px;
  background: rgba(3,5,10,.34);
  padding: clamp(18px, 3vw, 28px);
}

.student-status-card {
  border: 1px solid rgba(34,211,238,.24);
  border-radius: 18px;
  padding: 16px 18px;
  color: #e7ecf6;
  background: rgba(34,211,238,.08);
  font-weight: 900;
  line-height: 1.5;
}

.student-status-card.waiting {
  border-color: rgba(251,191,36,.34);
  background: rgba(251,191,36,.10);
  color: #fde68a;
}

.student-status-card.running {
  border-color: rgba(34,197,94,.34);
  background: rgba(34,197,94,.10);
  color: #bbf7d0;
}

.student-input-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 16px;
}

.student-participate-btn {
  width: min(340px, 100%);
  justify-content: center;
  font-size: 17px;
  padding: 14px 20px;
}

.student-runner {
  display: grid;
  gap: 22px;
}

.student-runner-top {
  display: grid;
  grid-template-columns: minmax(0,1fr) auto;
  gap: 20px;
  align-items: center;
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 22px;
  background: rgba(3,5,10,.34);
  padding: 18px;
}

.student-question-counter {
  margin: 0 0 10px;
  color: #d8dfec;
  font-weight: 1000;
  letter-spacing: .04em;
  text-transform: uppercase;
  font-size: 13px;
}

.student-progress-track {
  width: 100%;
  height: 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.10);
  overflow: hidden;
}

.student-progress-bar {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(to right, #818cf8, #22d3ee);
  transition: width .25s ease;
}

.student-timer {
  min-width: 120px;
  text-align: center;
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1;
  font-weight: 1000;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(to right, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.student-question-host {
  min-height: 330px;
  border: 1px solid rgba(50,216,241,.20);
  border-radius: 28px;
  background: rgba(3,5,10,.40);
  padding: clamp(20px, 4vw, 36px);
  box-shadow: inset 0 0 48px rgba(50,216,241,.04);
}

.single-student-question {
  display: grid;
  gap: 22px;
}

.single-student-question h2 {
  margin: 0;
  color: #fff;
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.2;
  letter-spacing: -.02em;
}

.student-option-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 18px;
  padding: 16px;
  color: #e7ecf6;
  background: rgba(255,255,255,.04);
  cursor: pointer;
  transition: .18s ease;
  font-weight: 800;
}

.student-option-card:hover {
  border-color: rgba(34,211,238,.38);
  transform: translateY(-1px);
}

.student-option-card:has(input:checked) {
  border-color: rgba(34,211,238,.72);
  background: rgba(34,211,238,.12);
  box-shadow: 0 0 0 4px rgba(34,211,238,.08);
}

.student-option-letter {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, #818cf8, #22d3ee);
  color: #03050a;
  font-weight: 1000;
}

.student-option-card input {
  margin-top: 8px;
  accent-color: #22d3ee;
}

.student-nav-actions {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.student-nav-actions button {
  min-width: 150px;
  justify-content: center;
}

@media (max-width: 760px) {
  .student-input-grid,
  .student-runner-top {
    grid-template-columns: 1fr;
  }

  .student-nav-actions {
    flex-direction: column;
  }

  .student-nav-actions button {
    width: 100%;
  }
}


/* v67: public quiz route isolation fix */
body.student-quiz-active {
  margin: 0;
  min-height: 100vh;
  overflow: hidden;
  background: #03050a;
}

body.student-quiz-active .app-shell,
body.student-quiz-active .app-footer,
body.student-quiz-active #loginPage {
  display: none !important;
}

body.student-quiz-active #studentQuizPage {
  display: block !important;
}

#studentQuizPage.student-quiz-page {
  position: fixed !important;
  inset: 0 !important;
  z-index: 2147483000 !important;
  overflow: auto !important;
  padding: clamp(18px, 3vw, 42px) !important;
  box-sizing: border-box;
  background:
    radial-gradient(circle at 12% 12%, rgba(129,140,248,.26), transparent 34%),
    radial-gradient(circle at 88% 72%, rgba(34,211,238,.22), transparent 38%),
    #03050a !important;
}

#studentQuizPage .student-quiz-card {
  width: min(980px, 100%) !important;
  margin: 0 auto !important;
  border: 1px solid rgba(50,216,241,.28) !important;
  border-radius: 30px !important;
  background: rgba(17,21,36,.88) !important;
  box-shadow: 0 30px 110px rgba(0,0,0,.55), inset 0 0 48px rgba(50,216,241,.06) !important;
  padding: clamp(22px, 4vw, 44px) !important;
  color: #fff !important;
}

#studentQuizPage input {
  width: 100%;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 14px;
  background: rgba(3,5,10,.72);
  color: #fff;
  padding: 13px 15px;
  outline: none;
  box-sizing: border-box;
}

#studentQuizPage label {
  color: #d8dfec;
  font-weight: 900;
}

#studentQuizPage.hidden {
  display: none !important;
}


/* v69: full-width Quizer results tabs */
.quizer-results-tabs {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  margin: 2px 0 -4px;
}

.result-tab-btn {
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 999px;
  padding: 12px 18px;
  background: rgba(255,255,255,.06);
  color: #d8dfec;
  font-weight: 1000;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  transition: .18s ease;
}

.result-tab-btn:hover,
.result-tab-btn.active {
  color: #03050a;
  border-color: rgba(34,211,238,.65);
  background: linear-gradient(135deg, #818cf8, #22d3ee);
  box-shadow: 0 16px 36px rgba(34,211,238,.14);
}

.result-tab-panel {
  display: none;
}

.result-tab-panel.active {
  display: block;
}

.result-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.full-width-table {
  width: 100%;
  max-width: 100%;
}

.batch-pivot-table th,
.batch-pivot-table td {
  white-space: nowrap;
}

.batch-pivot-table th span {
  display: inline-block;
  margin-top: 4px;
  max-width: 180px;
  color: #d8dfec;
  font-size: 12px;
  text-transform: none;
  letter-spacing: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  vertical-align: bottom;
}

.batch-pivot-table td strong {
  color: #22d3ee;
}

.leaderboard-card,
.batch-dashboard-card {
  min-height: 520px;
}


/* v70: expandable Quizer results and dashboard filtering */
.batch-filter-row {
  display: flex;
  align-items: center;
  gap: 10px;
  width: min(520px, 100%);
  margin: 0 0 16px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 16px;
  background: rgba(3,5,10,.55);
  padding: 0 14px;
  color: #22d3ee;
}

.batch-filter-row input {
  width: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  color: #fff;
  padding: 13px 0;
  font-weight: 800;
}

.batch-filter-row input::placeholder {
  color: #7f8ca3;
}

.result-fullscreen {
  position: fixed !important;
  inset: 18px !important;
  z-index: 4500 !important;
  display: block !important;
  min-height: auto !important;
  overflow: hidden !important;
  border-radius: 28px !important;
  background:
    radial-gradient(circle at 12% 12%, rgba(129,140,248,.18), transparent 34%),
    radial-gradient(circle at 88% 72%, rgba(34,211,238,.16), transparent 38%),
    rgba(17,21,36,.97) !important;
  box-shadow: 0 30px 120px rgba(0,0,0,.72), inset 0 0 60px rgba(50,216,241,.05) !important;
}

.result-fullscreen .table-wrap {
  max-height: calc(100vh - 220px);
  overflow: auto;
}

.result-fullscreen .leaderboard-top {
  position: sticky;
  top: 0;
  z-index: 3;
  padding-bottom: 16px;
  background: linear-gradient(to bottom, rgba(17,21,36,.98), rgba(17,21,36,.84));
}

body.quizer-results-expanded::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 4490;
  background: rgba(0,0,0,.62);
  backdrop-filter: blur(8px);
}

body.quizer-results-expanded {
  overflow: hidden;
}

.result-fullscreen .quiz-table {
  font-size: 15px;
}

.result-fullscreen .quiz-table th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: rgba(6,10,20,.98);
}

@media (max-width: 760px) {
  .result-fullscreen {
    inset: 8px !important;
    border-radius: 20px !important;
  }

  .result-fullscreen .table-wrap {
    max-height: calc(100vh - 245px);
  }
}


/* v71: leaderboard expanded header + quiz review modal */
.question-explanation-label {
  display: grid;
  gap: 8px;
  margin-top: 14px;
  color: #d8dfec;
  font-weight: 900;
}

.question-explanation-label textarea {
  width: 100%;
  min-height: 82px;
  resize: vertical;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 14px;
  background: rgba(3,5,10,.72);
  color: #fff;
  padding: 12px 14px;
  outline: none;
}

.leaderboard-expanded-meta {
  display: none;
  padding: 18px 18px 8px;
  margin-bottom: 8px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-bottom: 1px solid rgba(255,255,255,.10);
}

.leaderboard-expanded-meta h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1;
  background: linear-gradient(to right, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.leaderboard-expanded-meta p {
  margin: 8px 0 0;
  color: #aab5c8;
  font-weight: 850;
}

.expanded-leaderboard-timer {
  min-width: 170px;
  text-align: right;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1;
  font-weight: 1000;
  color: #aab5c8;
  font-variant-numeric: tabular-nums;
}

.expanded-leaderboard-timer.running {
  background: linear-gradient(to right, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.result-fullscreen .leaderboard-expanded-meta {
  display: flex;
}

.result-fullscreen .leaderboard-top {
  padding: 18px 18px 16px;
}

.result-fullscreen .leaderboard-top .section-kicker,
.result-fullscreen .leaderboard-top h3 {
  margin-left: 0;
}

.quiz-review-modal {
  position: fixed;
  inset: 0;
  z-index: 7000;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(0,0,0,.68);
  backdrop-filter: blur(10px);
}

.quiz-review-dialog {
  width: min(1100px, 100%);
  max-height: 92vh;
  overflow: hidden;
  border: 1px solid rgba(50,216,241,.28);
  border-radius: 30px;
  background:
    radial-gradient(circle at 12% 12%, rgba(129,140,248,.18), transparent 34%),
    radial-gradient(circle at 88% 72%, rgba(34,211,238,.14), transparent 38%),
    rgba(17,21,36,.98);
  box-shadow: 0 30px 120px rgba(0,0,0,.72), inset 0 0 60px rgba(50,216,241,.05);
  color: #fff;
}

.quiz-review-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px;
  border-bottom: 1px solid rgba(255,255,255,.10);
}

.quiz-review-header h2 {
  margin: 0;
  font-size: clamp(26px, 3vw, 42px);
  background: linear-gradient(to right, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.quiz-review-header p:not(.section-kicker) {
  margin: 8px 0 0;
  color: #aab5c8;
  font-weight: 800;
}

.quiz-review-body {
  max-height: calc(92vh - 135px);
  overflow: auto;
  padding: 22px;
  display: grid;
  gap: 18px;
}

.quiz-review-question {
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 22px;
  background: rgba(3,5,10,.42);
  padding: 20px;
}

.quiz-review-question-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: #22d3ee;
  font-weight: 1000;
  text-transform: uppercase;
  letter-spacing: .07em;
  font-size: 12px;
}

.quiz-review-question h3 {
  margin: 12px 0 16px;
  font-size: 22px;
  line-height: 1.35;
}

.quiz-review-options {
  display: grid;
  gap: 10px;
}

.quiz-review-option {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 16px;
  padding: 12px;
  background: rgba(255,255,255,.04);
}

.quiz-review-option span {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(255,255,255,.10);
  font-weight: 1000;
}

.quiz-review-option p {
  margin: 4px 0 0;
  color: #e7ecf6;
  font-weight: 800;
}

.quiz-review-option.correct {
  border-color: rgba(34,197,94,.50);
  background: rgba(34,197,94,.10);
}

.quiz-review-option.correct span {
  background: #86efac;
  color: #03050a;
}

.quiz-review-explanation {
  margin-top: 14px;
  border: 1px solid rgba(34,211,238,.24);
  border-radius: 16px;
  padding: 14px;
  background: rgba(34,211,238,.08);
}

.quiz-review-explanation strong {
  color: #22d3ee;
}

.quiz-review-explanation p {
  margin: 8px 0 0;
  color: #d8dfec;
  line-height: 1.55;
  font-weight: 750;
}

@media (max-width: 760px) {
  .leaderboard-expanded-meta,
  .quiz-review-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .expanded-leaderboard-timer {
    text-align: left;
  }
}


/* v72: markdown/code rendering in quiz review */
.quiz-review-question code,
.quiz-review-option code,
.quiz-review-explanation code {
  display: inline-block;
  border: 1px solid rgba(34, 211, 238, .24);
  border-radius: 8px;
  padding: 2px 6px;
  background: rgba(34, 211, 238, .10);
  color: #a5f3fc;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: .92em;
}

.quiz-review-question pre,
.quiz-review-option pre,
.quiz-review-explanation pre {
  overflow: auto;
  border: 1px solid rgba(34, 211, 238, .22);
  border-radius: 14px;
  padding: 14px;
  background: rgba(3, 5, 10, .82);
  color: #e0f2fe;
  line-height: 1.5;
  white-space: pre-wrap;
}

.quiz-review-explanation p,
.quiz-review-option p {
  font-weight: 500;
}


/* v73: Cloudflare R2 image/GIF upload status */
.drawing-upload-status {
  position: sticky;
  left: 18px;
  bottom: 18px;
  z-index: 6000;
  width: max-content;
  max-width: min(520px, calc(100vw - 36px));
  margin: 12px 0;
  border: 1px solid rgba(34, 211, 238, .35);
  border-radius: 999px;
  padding: 11px 16px;
  background: rgba(3, 5, 10, .88);
  color: #a5f3fc;
  font-weight: 900;
  box-shadow: 0 18px 48px rgba(0, 0, 0, .38);
  backdrop-filter: blur(10px);
}

.drawing-upload-status.error {
  border-color: rgba(251, 113, 133, .45);
  color: #fecdd3;
}


/* v76: in-app toast notifications replacing browser alerts */
.toast-host {
  position: fixed;
  top: 22px;
  right: 22px;
  z-index: 9000;
  display: grid;
  gap: 12px;
  width: min(420px, calc(100vw - 32px));
  pointer-events: none;
}

.app-toast {
  pointer-events: auto;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  border: 1px solid rgba(34, 211, 238, .28);
  border-radius: 18px;
  padding: 14px 16px;
  background:
    radial-gradient(circle at 10% 0%, rgba(129, 140, 248, .18), transparent 34%),
    rgba(9, 14, 27, .96);
  color: #e7ecf6;
  box-shadow: 0 18px 48px rgba(0, 0, 0, .38);
  backdrop-filter: blur(12px);
  transform: translateX(18px);
  opacity: 0;
  transition: .22s ease;
  font-weight: 850;
  line-height: 1.45;
}

.app-toast.show {
  transform: translateX(0);
  opacity: 1;
}

.app-toast > i {
  margin-top: 3px;
  color: #22d3ee;
  font-size: 18px;
}

.app-toast.success {
  border-color: rgba(34, 197, 94, .38);
}

.app-toast.success > i {
  color: #86efac;
}

.app-toast.error,
.app-toast.warning,
.app-toast.confirm.danger {
  border-color: rgba(251, 113, 133, .38);
}

.app-toast.error > i,
.app-toast.warning > i,
.app-toast.confirm.danger i {
  color: #fb7185;
}

.app-toast.confirm {
  display: block;
  padding: 16px;
}

.toast-confirm-body {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 12px;
}

.toast-confirm-body i {
  margin-top: 3px;
  color: #22d3ee;
  font-size: 18px;
}

.toast-confirm-body strong {
  display: block;
  color: #fff;
  font-size: 15px;
  margin-bottom: 4px;
}

.toast-confirm-body p {
  margin: 0;
  color: #cbd5e1;
  font-weight: 750;
}

.toast-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 14px;
}

.toast-actions button {
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 999px;
  padding: 8px 13px;
  font-weight: 1000;
  cursor: pointer;
}

.toast-cancel {
  background: rgba(255, 255, 255, .06);
  color: #d8dfec;
}

.toast-confirm {
  border-color: rgba(34, 211, 238, .50) !important;
  background: linear-gradient(135deg, #818cf8, #22d3ee);
  color: #03050a;
}

.app-toast.confirm.danger .toast-confirm {
  border-color: rgba(251, 113, 133, .55) !important;
  background: linear-gradient(135deg, #fb7185, #f97316);
  color: #fff;
}

@media (max-width: 680px) {
  .toast-host {
    top: 14px;
    right: 14px;
    left: 14px;
    width: auto;
  }
}


/* v77: final slide presentation typography, line colors, and R2 slide uploads */
.slide-upload-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.slide-line-color-panel {
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 18px;
  padding: 14px;
  background: rgba(255, 255, 255, .035);
}

.slide-line-color-header {
  display: flex;
  align-items: baseline;
  gap: 10px;
  justify-content: space-between;
  margin-bottom: 10px;
}

.slide-line-color-controls {
  display: grid;
  gap: 8px;
  max-height: 220px;
  overflow: auto;
  padding-right: 4px;
}

.slide-line-color-row {
  display: grid !important;
  grid-template-columns: 34px 34px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 14px;
  background: rgba(3, 5, 10, .28);
  color: #d8dfec;
}

.slide-line-color-row .line-number {
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 999px;
  background: rgba(34, 211, 238, .10);
  color: #a5f3fc;
  font-size: 12px;
  font-weight: 1000;
}

.slide-line-color-row input[type="color"] {
  width: 28px;
  height: 28px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  overflow: hidden;
  background: transparent;
  cursor: pointer;
}

.slide-line-color-row input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

.slide-line-color-row input[type="color"]::-webkit-color-swatch {
  border: 0;
  border-radius: 999px;
}

.slide-line-color-row .line-preview {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.slide-colored-line {
  color: var(--slide-body-color, #d8dfec);
}

.slide-colored-line > :first-child {
  margin-top: 0;
}

.slide-colored-line > :last-child {
  margin-bottom: 0;
}

.slide-line-bullet {
  padding-left: .15em;
}

.presentation-slide h1,
#presentationTitle {
  font-size: 42px !important;
  line-height: 1.15;
  font-weight: 900 !important;
  margin: 0 0 22px;
}

.presentation-markdown,
#presentationBody {
  font-size: 32px !important;
  line-height: 1.35;
  font-weight: 400 !important;
}

.presentation-markdown p,
.presentation-markdown li,
.presentation-markdown blockquote,
.presentation-markdown .slide-colored-line {
  font-size: 32px !important;
  font-weight: 400 !important;
}

.presentation-markdown strong {
  font-weight: 700;
}

.presentation-markdown h1,
.presentation-markdown h2,
.presentation-markdown h3 {
  font-size: 32px !important;
  font-weight: 600;
  line-height: 1.28;
}

.slide-preview-media img,
.presentation-video-host img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 18px;
}

.slide-preview-media:not(.hidden) {
  display: grid;
  place-items: center;
  margin-top: 18px;
  max-height: 220px;
  overflow: hidden;
}

.presentation-video-host {
  display: grid;
  place-items: center;
}

.presentation-video-host img {
  max-height: min(330px, 42vh);
}


/* v78: force slide description line colors to win over inherited/default colors */
.slide-colored-line,
.slide-colored-line p,
.slide-colored-line h1,
.slide-colored-line h2,
.slide-colored-line h3,
.slide-colored-line blockquote,
.slide-colored-line li,
.slide-colored-line strong,
.slide-colored-line em,
.slide-colored-line code {
  color: inherit !important;
}

#previewBody .slide-colored-line,
#presentationBody .slide-colored-line {
  color: inherit;
}


/* v79: collapsible Quiz Setup panel */
.quizer-setup-toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.quizer-setup-toggle {
  min-width: 86px;
  justify-content: center;
  white-space: nowrap;
}

.quizer-grid.quiz-setup-collapsed {
  grid-template-columns: 72px minmax(0, 1fr);
}

.quizer-grid.quiz-setup-collapsed .quizer-sidebar {
  min-height: 220px;
  padding: 12px;
  justify-items: center;
  align-content: start;
}

.quizer-grid.quiz-setup-collapsed .quizer-sidebar > :not(.quizer-setup-toggle-row) {
  display: none !important;
}

.quizer-grid.quiz-setup-collapsed .quizer-setup-toggle-row {
  width: 100%;
  justify-content: center;
}

.quizer-grid.quiz-setup-collapsed .quizer-setup-toggle-row h3 {
  display: none;
}

.quizer-grid.quiz-setup-collapsed .quizer-setup-toggle {
  width: 46px;
  height: 46px;
  min-width: 46px;
  padding: 0;
  border-radius: 999px;
}

.quizer-grid.quiz-setup-collapsed .quizer-setup-toggle span {
  display: none;
}

.quizer-grid.quiz-setup-collapsed .quizer-setup-toggle i {
  transform: rotate(180deg);
}

.quizer-grid.quiz-setup-collapsed .quizer-main,
.quizer-grid.quiz-setup-collapsed .quiz-builder-card {
  width: 100%;
  min-width: 0;
}

@media (max-width: 980px) {
  .quizer-grid.quiz-setup-collapsed {
    grid-template-columns: 1fr;
  }

  .quizer-grid.quiz-setup-collapsed .quizer-sidebar {
    min-height: auto;
    position: static;
    justify-items: start;
  }

  .quizer-grid.quiz-setup-collapsed .quizer-setup-toggle-row {
    justify-content: flex-start;
  }
}


/* v80: collapsible Quiz Builder body */
.quiz-builder-top {
  gap: 14px;
}

.quiz-builder-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.quiz-builder-toggle {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.quiz-builder-body {
  display: grid;
  gap: 16px;
}

.quiz-builder-body[hidden] {
  display: none !important;
}

.quiz-builder-card.quiz-builder-collapsed {
  padding-bottom: 18px;
}

.quiz-builder-card.quiz-builder-collapsed .quiz-builder-top {
  margin-bottom: 0;
}

.quiz-builder-card.quiz-builder-collapsed #quizBuilderMode::after {
  content: " — questions hidden";
  color: #94a3b8;
  font-size: .72em;
  font-weight: 700;
}

@media (max-width: 760px) {
  .quiz-builder-header-actions {
    justify-content: flex-start;
  }
}


/* v82: Milestones Jira-style board */
.milestone-header .section-subtitle {
  max-width: 760px;
  color: #aeb8ca;
  font-weight: 650;
}

.milestone-form {
  margin-bottom: 22px;
}

.milestone-form-grid {
  grid-template-columns: minmax(260px, 1fr) 160px;
}

.milestone-form input[type="color"] {
  width: 54px;
  height: 42px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  overflow: hidden;
  background: transparent;
  cursor: pointer;
}

.milestone-form input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

.milestone-form input[type="color"]::-webkit-color-swatch {
  border: 0;
  border-radius: 999px;
}

.milestone-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(260px, 1fr));
  gap: 18px;
  align-items: start;
}

.milestone-column {
  min-height: 540px;
  border: 1px solid rgba(255, 255, 255, .09);
  border-radius: 26px;
  padding: 16px;
  background:
    radial-gradient(circle at 20% 0%, rgba(34, 211, 238, .10), transparent 34%),
    rgba(9, 14, 27, .62);
  box-shadow: 0 22px 70px rgba(0, 0, 0, .22);
}

.milestone-column-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.milestone-column-header h3 {
  margin: 0;
  font-size: 18px;
  color: #eef4ff;
}

.milestone-column-header span {
  display: inline-grid;
  place-items: center;
  min-width: 34px;
  height: 28px;
  padding: 0 9px;
  border-radius: 999px;
  background: rgba(34, 211, 238, .12);
  color: #a5f3fc;
  font-weight: 1000;
}

.milestone-dropzone {
  display: grid;
  gap: 12px;
  min-height: 450px;
  border-radius: 20px;
  padding: 8px;
  align-content: start;
  transition: background .18s ease, outline .18s ease;
}

.milestone-dropzone.drag-over {
  outline: 2px dashed rgba(34, 211, 238, .55);
  background: rgba(34, 211, 238, .06);
}

.milestone-empty {
  display: grid;
  place-items: center;
  min-height: 92px;
  border: 1px dashed rgba(255, 255, 255, .12);
  border-radius: 18px;
  color: #64748b;
  font-weight: 850;
  text-align: center;
  padding: 14px;
}

.milestone-card {
  position: relative;
  display: grid;
  gap: 14px;
  border: 2px solid #22d3ee;
  border-left-width: 7px;
  border-radius: 18px;
  padding: 15px 14px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, .075), rgba(255, 255, 255, .03)),
    rgba(15, 23, 42, .88);
  box-shadow: 0 16px 42px rgba(0, 0, 0, .24);
  cursor: grab;
  user-select: none;
}

.milestone-card:active {
  cursor: grabbing;
}

.milestone-card.dragging {
  opacity: .62;
  transform: rotate(1deg) scale(.99);
}

.milestone-card-title {
  color: #f8fbff;
  font-weight: 950;
  font-size: 16px;
  line-height: 1.35;
  padding-right: 58px;
}

.milestone-card-actions {
  position: absolute;
  right: 10px;
  top: 10px;
  display: flex;
  gap: 7px;
  opacity: 0;
  transform: translateY(-3px);
  transition: .16s ease;
}

.milestone-card:hover .milestone-card-actions,
.milestone-card:focus-within .milestone-card-actions {
  opacity: 1;
  transform: translateY(0);
}

.milestone-card-actions button {
  width: 30px;
  height: 30px;
  border: 1px solid rgba(255, 255, 255, .11);
  border-radius: 999px;
  background: rgba(3, 5, 10, .72);
  color: #d8dfec;
  cursor: pointer;
}

.milestone-card-actions button:hover {
  border-color: rgba(34, 211, 238, .45);
  color: #67e8f9;
}

.milestone-card-actions .milestone-delete:hover {
  border-color: rgba(251, 113, 133, .55);
  color: #fb7185;
}

@media (max-width: 980px) {
  .milestone-board {
    grid-template-columns: 1fr;
  }

  .milestone-column {
    min-height: 320px;
  }

  .milestone-dropzone {
    min-height: 220px;
  }

  .milestone-form-grid {
    grid-template-columns: 1fr;
  }
}


/* v84: Milestone title input with inline border color picker */
.milestone-inline-field {
  display: grid;
  gap: 8px;
}

.milestone-inline-field > label {
  color: #d8dfec;
  font-weight: 900;
}

.milestone-title-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.milestone-title-input-wrap input[type="text"] {
  width: 100%;
  padding-right: 66px !important;
}

.milestone-title-input-wrap input[type="color"] {
  position: absolute;
  right: 13px;
  top: 50%;
  transform: translateY(-50%);
  width: 34px;
  height: 34px;
  padding: 0;
  border: 2px solid rgba(255, 255, 255, .16);
  border-radius: 999px;
  overflow: hidden;
  background: transparent;
  cursor: pointer;
  box-shadow: 0 0 0 4px rgba(3, 5, 10, .35);
}

.milestone-title-input-wrap input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

.milestone-title-input-wrap input[type="color"]::-webkit-color-swatch {
  border: 0;
  border-radius: 999px;
}

.milestone-title-input-wrap input[type="color"]::-moz-color-swatch {
  border: 0;
  border-radius: 999px;
}

/* The old Milestone color field is now inside the title box, so keep the form one-column. */
.milestone-form-grid {
  grid-template-columns: 1fr !important;
}


/* v86: Milestone enter-to-add layout */
.milestone-form {
  margin-bottom: 34px !important;
}

.milestone-edit-actions {
  margin-top: 10px;
}

.milestone-edit-actions:empty,
.milestone-edit-actions .hidden:only-child {
  display: none;
}

.milestone-board {
  margin-top: 8px;
}


/* v87: primary admin user management page */
.admin-route .app-shell,
.admin-route #quickPresentBtn,
.admin-route #openDrawingBtn,
.admin-route .brand-logo-badge {
  display: none !important;
}

.admin-route #adminUsersPage {
  display: block !important;
}

.admin-users-page {
  min-height: 100vh;
  padding: 34px;
  position: relative;
  overflow: hidden;
}

.admin-users-page.hidden {
  display: none;
}

.admin-users-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 12% 12%, rgba(129, 140, 248, .22), transparent 34%),
    radial-gradient(circle at 88% 8%, rgba(34, 211, 238, .16), transparent 28%),
    linear-gradient(135deg, #020617 0%, #0f172a 52%, #111827 100%);
}

.admin-users-shell {
  max-width: 1280px;
  margin: 0 auto;
}

.admin-users-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, .10);
  border-radius: 28px;
  background: rgba(15, 23, 42, .72);
  box-shadow: 0 24px 80px rgba(0, 0, 0, .28);
}

.admin-users-header h1 {
  margin: 4px 0 8px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: .95;
  color: transparent;
  background: linear-gradient(to right, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
}

.admin-users-header p {
  margin: 0;
  color: #aeb8ca;
  font-weight: 700;
}

.admin-users-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.admin-users-content {
  display: grid;
  gap: 22px;
}

.admin-user-form {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr auto;
  gap: 14px;
  align-items: end;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, .10);
  border-radius: 24px;
  background: rgba(15, 23, 42, .66);
}

.admin-user-form label {
  display: block;
  margin-bottom: 8px;
  color: #d8dfec;
  font-weight: 900;
}

.admin-user-form input {
  width: 100%;
  min-height: 46px;
  border: 1px solid rgba(255, 255, 255, .10);
  border-radius: 15px;
  background: rgba(2, 6, 23, .65);
  color: #f8fbff;
  padding: 0 14px;
  outline: none;
}

.admin-user-form input:focus {
  border-color: rgba(34, 211, 238, .62);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, .10);
}

.admin-users-table-wrap {
  overflow-x: auto;
  border: 1px solid rgba(255, 255, 255, .10);
  border-radius: 24px;
  background: rgba(15, 23, 42, .62);
  box-shadow: 0 22px 70px rgba(0, 0, 0, .24);
}

.admin-users-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 920px;
}

.admin-users-table th,
.admin-users-table td {
  padding: 15px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  color: #d8dfec;
  vertical-align: middle;
}

.admin-users-table th {
  color: #93c5fd;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .08em;
  background: rgba(2, 6, 23, .42);
}

.admin-users-table td strong {
  display: block;
  color: #f8fbff;
  margin-bottom: 3px;
}

.admin-users-table td span {
  color: #94a3b8;
  font-size: 13px;
}

.admin-status-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 7px 11px;
  font-size: 12px !important;
  font-weight: 1000;
}

.admin-status-pill.active {
  background: rgba(16, 185, 129, .13);
  color: #86efac !important;
  border: 1px solid rgba(16, 185, 129, .28);
}

.admin-status-pill.inactive {
  background: rgba(251, 113, 133, .12);
  color: #fda4af !important;
  border: 1px solid rgba(251, 113, 133, .28);
}

.admin-reset-row {
  display: flex;
  gap: 8px;
  min-width: 250px;
}

.admin-reset-row input {
  min-height: 40px;
  border-radius: 13px;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(2, 6, 23, .62);
  color: #f8fbff;
  padding: 0 12px;
}

.admin-table-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.ghost-btn.danger {
  border-color: rgba(251, 113, 133, .38);
  color: #fda4af;
}

.admin-users-empty {
  text-align: center !important;
  color: #94a3b8 !important;
  padding: 32px !important;
}

.admin-users-gate {
  display: grid;
  place-items: center;
  text-align: center;
  gap: 10px;
  min-height: 420px;
  border: 1px solid rgba(255, 255, 255, .10);
  border-radius: 28px;
  background: rgba(15, 23, 42, .72);
}

.admin-users-gate i {
  font-size: 46px;
  color: #22d3ee;
}

.admin-users-gate h2 {
  margin: 0;
  color: #f8fbff;
  font-size: 30px;
}

.admin-users-gate p {
  margin: 0;
  color: #aeb8ca;
  font-weight: 700;
}

@media (max-width: 980px) {
  .admin-users-page {
    padding: 18px;
  }

  .admin-users-header {
    flex-direction: column;
  }

  .admin-user-form {
    grid-template-columns: 1fr;
  }
}