:root {
  --sl-blue: #1a73e8;
  --sl-blue-soft: #e8f0fe;
  --sl-blue-hover: #185abc;
  --sl-text: #202124;
  --sl-text-soft: #5f6368;
  --sl-text-faint: #80868b;
  --sl-bg: #f8f9fa;
  --sl-surface: #ffffff;
  --sl-border: #dadce0;
  --sl-border-soft: #e8eaed;
  --sl-hover: #f1f3f4;
  --sl-active: #e8f0fe;
  --sl-shadow: 0 1px 3px rgba(60, 64, 67, 0.15), 0 1px 2px rgba(60, 64, 67, 0.1);
  --sl-shadow-lg: 0 4px 12px rgba(60, 64, 67, 0.15), 0 1px 3px rgba(60, 64, 67, 0.1);
  --sl-canvas-bg: #f1f3f4;
  --sl-slide-yellow: #fbbc04;
  --font: "Roboto", "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --sl-text: #e8eaed;
    --sl-text-soft: #9aa0a6;
    --sl-text-faint: #80868b;
    --sl-bg: #202124;
    --sl-surface: #2d2e30;
    --sl-border: #3c4043;
    --sl-border-soft: #3c4043;
    --sl-hover: #3c4043;
    --sl-active: #2a4067;
    --sl-blue-soft: #1f3d6e;
    --sl-canvas-bg: #1a1b1d;
    --sl-shadow: 0 1px 3px rgba(0,0,0,0.5);
    --sl-shadow-lg: 0 4px 12px rgba(0,0,0,0.6);
  }
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0; height: 100vh;
  background: var(--sl-bg); color: var(--sl-text);
  font-family: var(--font); font-size: 14px;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}
button { font-family: inherit; }
a { color: inherit; text-decoration: none; }

/* === App bar === */
.sl-appbar {
  display: flex; align-items: center; justify-content: space-between;
  height: 48px;
  background: var(--sl-surface);
  border-bottom: 1px solid var(--sl-border-soft);
  padding: 0 4px 0 8px;
  flex-shrink: 0;
  position: relative;
  z-index: 5;
}
.sl-appbar-l { display: flex; align-items: center; gap: 4px; min-width: 0; flex: 1; }
.sl-appbar-r { display: flex; align-items: center; gap: 8px; padding-right: 8px; }
.sl-icon-btn {
  width: 40px; height: 40px;
  background: transparent; border: 0; border-radius: 50%;
  display: grid; place-items: center;
  cursor: pointer; color: var(--sl-text-soft);
  transition: background 100ms;
}
.sl-icon-btn:hover { background: var(--sl-hover); }

.sl-logo { display: flex; align-items: center; padding: 0 6px 0 4px; }
.sl-logomark {
  width: 28px; height: 36px;
  background: linear-gradient(135deg, #fbbc04 0%, #f9ab00 60%, #f29900 100%);
  position: relative;
  border-radius: 1px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}
.sl-logomark::before {
  content: ""; position: absolute;
  top: 0; right: 0;
  width: 10px; height: 10px;
  background: linear-gradient(225deg, #f29900, #d18802);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}
.sl-logomark::after {
  content: ""; position: absolute;
  inset: 8px 5px;
  background:
    linear-gradient(white, white) 0 0/100% 2px no-repeat,
    linear-gradient(white, white) 0 5px/100% 2px no-repeat,
    linear-gradient(white, white) 0 10px/70% 2px no-repeat;
  opacity: 0.8;
}

.sl-titlewrap { min-width: 0; flex: 1; }
.sl-title {
  font-size: 18px; font-weight: 400;
  color: var(--sl-text);
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid transparent;
  outline: none;
  cursor: text;
  display: inline-block;
  max-width: 100%;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.sl-title:hover { border-color: var(--sl-border); }
.sl-title:focus { border-color: var(--sl-blue); }
.sl-subnav {
  display: flex; align-items: center; gap: 4px;
  padding: 0 8px;
  font-size: 12px; color: var(--sl-text-faint);
}
.sl-icon-mini {
  width: 26px; height: 26px;
  background: transparent; border: 0; border-radius: 50%;
  display: grid; place-items: center;
  cursor: pointer; color: var(--sl-text-soft);
}
.sl-icon-mini:hover { background: var(--sl-hover); }
.sl-saved { margin-left: 2px; }

.sl-btn {
  height: 36px; padding: 0 24px;
  background: transparent; border: 1px solid transparent;
  border-radius: 4px;
  font-size: 14px; font-weight: 500;
  color: var(--sl-text-soft);
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px;
  transition: background 80ms, color 80ms, box-shadow 80ms;
}
.sl-btn-ghost:hover { background: var(--sl-hover); color: var(--sl-text); }
.sl-btn-primary {
  background: var(--sl-blue); color: white;
  font-weight: 500;
  box-shadow: 0 1px 2px rgba(0,0,0,0.15);
}
.sl-btn-primary:hover { background: var(--sl-blue-hover); box-shadow: 0 2px 4px rgba(0,0,0,0.2); }

.sl-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4F46E5, #8B5CF6);
  color: white;
  display: grid; place-items: center;
  font-size: 14px; font-weight: 500;
  margin-left: 4px;
  cursor: pointer;
}

/* === Menu bar === */
.sl-menubar {
  display: flex; align-items: center; gap: 4px;
  background: var(--sl-surface);
  border-bottom: 1px solid var(--sl-border-soft);
  padding: 2px 12px 4px;
  font-size: 13px;
  color: var(--sl-text-soft);
  flex-shrink: 0;
}
.sl-menubar span {
  padding: 4px 8px;
  border-radius: 4px;
  cursor: default;
}
.sl-menubar span:hover { background: var(--sl-hover); }

/* === Toolbar === */
.sl-toolbar {
  display: flex; align-items: center; gap: 2px;
  background: var(--sl-bg);
  border-bottom: 1px solid var(--sl-border-soft);
  padding: 4px 8px;
  flex-shrink: 0;
}
.sl-tool {
  height: 28px; min-width: 28px; padding: 0 4px;
  background: transparent; border: 0; border-radius: 4px;
  font-size: 14px; color: var(--sl-text-soft);
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: background 80ms;
}
.sl-tool:hover { background: var(--sl-hover); color: var(--sl-text); }
.sl-tool-text { padding: 0 10px; font-weight: 500; }
.sl-sep {
  width: 1px; height: 20px;
  background: var(--sl-border);
  margin: 0 4px;
  display: inline-block;
}
.sl-zoom { font-size: 13px; color: var(--sl-text-soft); padding: 0 6px; }

.sl-search {
  margin-left: auto;
  height: 28px;
  padding: 0 12px 0 30px;
  background: var(--sl-hover) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235f6368' stroke-width='2.5' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='M21 21l-4.3-4.3'/%3E%3C/svg%3E") no-repeat 8px center;
  background-size: 14px;
  border: 1px solid transparent;
  border-radius: 16px;
  font-size: 13px;
  color: var(--sl-text);
  width: 220px;
  outline: none;
  font-family: inherit;
  transition: background 80ms, border-color 80ms, width 200ms;
}
.sl-search:focus {
  background-color: var(--sl-surface);
  border-color: var(--sl-blue);
  width: 280px;
}

/* === Body: sidebar + canvas === */
.sl-body {
  display: flex;
  flex: 1;
  min-height: 0;
  background: var(--sl-bg);
}
.sl-sidebar {
  width: 240px;
  background: var(--sl-surface);
  border-right: 1px solid var(--sl-border-soft);
  overflow-y: auto;
  flex-shrink: 0;
  padding: 8px 0;
}
.sl-slidelist { display: flex; flex-direction: column; gap: 8px; padding: 4px 16px; }

.sl-slide {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  position: relative;
  padding: 4px 0;
  text-decoration: none;
  color: var(--sl-text);
}
.sl-slide-num {
  font-size: 12px;
  color: var(--sl-text-faint);
  width: 18px;
  text-align: right;
  flex-shrink: 0;
}
.sl-slide-thumb {
  flex: 1;
  aspect-ratio: 16 / 9;
  background-size: cover;
  background-position: center;
  background-color: var(--sl-surface);
  border: 2px solid transparent;
  border-radius: 2px;
  box-shadow: 0 0 0 1px var(--sl-border-soft);
  position: relative;
  overflow: hidden;
  transition: border-color 120ms, transform 120ms;
}
.sl-slide:hover .sl-slide-thumb {
  border-color: var(--sl-blue);
}
.sl-slide.active .sl-slide-thumb {
  border-color: var(--sl-blue);
  box-shadow: 0 0 0 1px var(--sl-blue);
}
.sl-slide.active .sl-slide-num { color: var(--sl-blue); font-weight: 700; }
.sl-slide-fav {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 20px; height: 20px;
  background: rgba(255,255,255,0.85);
  border: 0; border-radius: 50%;
  display: grid; place-items: center;
  cursor: pointer;
  font-size: 10px;
  color: #888;
  opacity: 0;
  transition: opacity 120ms;
}
.sl-slide:hover .sl-slide-fav { opacity: 1; }
.sl-slide-fav.on { opacity: 1; color: var(--sl-blue); background: white; }

/* === Canvas === */
.sl-canvas {
  flex: 1;
  min-width: 0;
  background: var(--sl-canvas-bg);
  overflow: auto;
  display: flex;
  flex-direction: column;
}
.sl-canvas-frame {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 24px 16px 8px;
  min-height: 0;
}
.sl-slide-preview {
  width: 100%;
  max-width: 920px;
  aspect-ratio: 16 / 9;
  background: var(--sl-surface);
  box-shadow: var(--sl-shadow-lg);
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}
.sl-slide-content {
  padding: 64px 80px;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.sl-slide-title {
  font-size: 44px;
  font-weight: 400;
  margin-bottom: 12px;
  color: var(--sl-text);
  line-height: 1.15;
  outline: none;
}
.sl-slide-subtitle {
  font-size: 18px;
  font-weight: 400;
  color: var(--sl-text-soft);
  margin-bottom: 32px;
  outline: none;
}
.sl-slide-bullets {
  font-size: 18px;
  line-height: 1.6;
  color: var(--sl-text);
  margin: 0;
  padding-left: 24px;
  outline: none;
}
.sl-slide-bullets li { margin-bottom: 10px; }

.sl-canvas-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 24px;
  font-size: 12px;
  color: var(--sl-text-faint);
  flex-shrink: 0;
}
.sl-canvas-spacer { flex: 1; }

/* When a slide is "playing" (selected), the canvas could change — keep simple for now */

/* === Panic overlay (already used by panic key) === */
.panic { position: fixed; inset: 0; background: #fff; z-index: 99999; display: none; font-family: "Google Sans", "Roboto", -apple-system, sans-serif; color: #202124; }
.panic.show { display: block; }
.panic .gc-bar { height: 64px; border-bottom: 1px solid #dadce0; display: flex; align-items: center; padding: 0 24px; font-size: 22px; color: #5f6368; font-weight: 500; gap: 12px; }
.panic .gc-bar .dot { width: 24px; height: 24px; border-radius: 50%; background: #1a73e8; }
.panic .gc-content { max-width: 1080px; margin: 32px auto; padding: 0 24px; }
.panic .gc-class { background: #fff; border: 1px solid #dadce0; border-radius: 8px; padding: 24px; margin-bottom: 16px; box-shadow: 0 1px 2px rgba(0,0,0,0.05); }
.panic .gc-class h3 { margin: 0 0 8px; color: #1a73e8; font-weight: 500; font-size: 22px; }
.panic .gc-class p { margin: 0; color: #5f6368; font-size: 14px; }
.panic .gc-hint { position: fixed; bottom: 16px; right: 16px; font-size: 11px; color: #9aa0a6; }

/* === Play page (kept from before) === */
body.play {
  background: #000; margin: 0; overflow: hidden; height: 100vh;
}
.play-bar {
  position: fixed; top: 8px; left: 8px; right: 8px;
  display: flex; justify-content: space-between; align-items: center; z-index: 10;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-radius: 10px; padding: 8px 12px;
  color: white; font-size: 13px; font-weight: 600;
  opacity: 0; transition: opacity 240ms; pointer-events: none;
  border: 1px solid rgba(255,255,255,0.06);
}
.play-bar.show { opacity: 1; pointer-events: auto; }
.play-bar a, .play-bar button {
  color: white; background: transparent; border: 0; font-family: inherit;
  font-weight: 600; font-size: 13px; cursor: pointer;
  padding: 6px 10px; border-radius: 6px; transition: background 160ms;
}
.play-bar a:hover, .play-bar button:hover { background: rgba(255, 255, 255, 0.1); }
#gameFrame { width: 100vw; height: 100vh; border: 0; background: #000; }

/* === Credits page (uses old card style) === */
.credits-list { display: grid; gap: 12px; max-width: 920px; margin: 0 auto; padding: 24px; }
.credit { background: var(--sl-surface); border: 1px solid var(--sl-border); border-radius: 8px; padding: 16px 20px; }
.credit h4 { margin: 0 0 6px; color: var(--sl-text); }
.credit p { margin: 0; color: var(--sl-text-soft); font-size: 13px; line-height: 1.55; }
.credit a { color: var(--sl-blue); }
.credit code { background: var(--sl-hover); padding: 1px 5px; border-radius: 3px; font-size: 12px; }
.credits-page-header { background: var(--sl-surface); border-bottom: 1px solid var(--sl-border-soft); padding: 12px 24px; display: flex; align-items: center; justify-content: space-between; }
.credits-page-back { color: var(--sl-blue); }

@media (max-width: 720px) {
  .sl-sidebar { width: 180px; }
  .sl-slide-content { padding: 32px 40px; }
  .sl-slide-title { font-size: 28px; }
  .sl-slide-subtitle { font-size: 14px; margin-bottom: 16px; }
  .sl-slide-bullets { font-size: 14px; }
  .sl-search { width: 140px; }
  .sl-search:focus { width: 180px; }
  .sl-menubar { display: none; }
  .sl-saved { display: none; }
  .sl-toolbar .sl-tool-text { display: none; }
}