:root {
  --cream: #fdf8ec;
  --paper: #fffdf7;
  --navy: #10243b;
  --navy-2: #1d3857;
  --muted: #6f695e;
  --line: rgba(16,36,59,.14);
  --copper: #b87338;
  --copper-2: #d59a5b;
  --display: "Kanit", "Sarabun", ui-sans-serif, system-ui, sans-serif;
  --body: "Sarabun", ui-sans-serif, system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  font-family: var(--body);
  color: var(--navy);
  background: var(--navy);
}

/* ── 16:9 stage ── */
.stage {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 78% 8%, rgba(184,115,56,.18), transparent 28rem),
    radial-gradient(circle at 12% 18%, rgba(16,36,59,.10), transparent 22rem),
    linear-gradient(135deg, #fffaf0 0%, var(--cream) 46%, #f6ead7 100%);
}

/* The slide box is 16:9, scaled to fit the viewport */
.slide {
  --slide-w: min(100vw, calc(100vh * 16 / 9));
  --slide-h: min(100vh, calc(100vw * 9 / 16));
  width: var(--slide-w);
  height: var(--slide-h);
  position: relative;
  overflow: hidden;
  background: var(--cream);
  border-radius: 6px;
  box-shadow: 0 8px 60px rgba(16,36,59,.25);
}

.slide-inner {
  width: 100%;
  height: 100%;
  padding: clamp(24px, 4.5vw, 64px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Typography ── */
.slide-label {
  font-family: var(--display);
  font-size: clamp(10px, 1.1vw, 16px);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--copper);
  margin-bottom: clamp(4px, 0.6vw, 12px);
}

.slide-title {
  font-family: var(--display);
  font-size: clamp(18px, 3vw, 48px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--navy);
  margin-bottom: clamp(8px, 1.2vw, 24px);
}

.slide-body {
  font-size: clamp(12px, 1.3vw, 20px);
  line-height: 1.55;
  color: var(--navy-2);
  flex: 1;
  overflow: hidden;
  /* Show only the first ~300 chars of excerpt */
  display: -webkit-box;
  -webkit-line-clamp: 8;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.slide-body h2 {
  display: none;  /* Hide h2 headers inside slides — label/title already show */
}

/* ── Image ── */
.slide-image-wrap {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  max-height: 36%;
  margin-top: clamp(8px, 1vw, 16px);
  overflow: hidden;
  border-radius: 12px;
  background: rgba(255,255,255,.45);
  border: 1px solid var(--line);
}

.slide-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* ── Reader link ── */
.slide-link {
  display: inline-block;
  margin-top: clamp(4px, 0.6vw, 12px);
  font-family: var(--display);
  font-size: clamp(10px, 1vw, 14px);
  font-weight: 600;
  color: var(--copper);
  text-decoration: none;
  transition: color .15s;
}
.slide-link:hover { color: var(--copper-2); }

/* ── Controls overlay ── */
.controls {
  position: fixed;
  bottom: clamp(12px, 2vh, 28px);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.5vw, 20px);
  padding: clamp(6px, 0.8vw, 12px) clamp(12px, 1.6vw, 24px);
  background: rgba(16,36,59,.88);
  backdrop-filter: blur(12px);
  border-radius: 999px;
  z-index: 10;
  opacity: 0;
  transition: opacity .25s;
}
body:hover .controls, body.controls-visible .controls { opacity: 1; }

.controls-left, .controls-right { display: flex; align-items: center; gap: clamp(4px, 0.6vw, 10px); }

.slide-counter {
  font-family: var(--display);
  font-size: clamp(11px, 1vw, 15px);
  font-weight: 600;
  color: rgba(255,255,255,.8);
  white-space: nowrap;
}

.ctrl-btn {
  border: none;
  background: rgba(255,255,255,.12);
  color: #fff;
  font-size: clamp(12px, 1.1vw, 18px);
  width: clamp(28px, 2.6vw, 44px);
  height: clamp(28px, 2.6vw, 44px);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .15s;
}
.ctrl-btn:hover { background: rgba(255,255,255,.22); }
.ctrl-btn.primary { background: var(--copper); }
.ctrl-btn.primary:hover { background: var(--copper-2); }

/* ── Progress bar ── */
.progress-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: rgba(16,36,59,.12);
  z-index: 10;
}
.progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--copper), var(--navy));
  transition: width .3s ease;
}

/* ── Speaker notes drawer ── */
.notes-drawer {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: clamp(140px, 22vh, 280px);
  background: rgba(16,36,59,.95);
  backdrop-filter: blur(12px);
  z-index: 20;
  transform: translateY(100%);
  transition: transform .3s ease;
  display: flex;
  flex-direction: column;
}
.notes-drawer.open { transform: translateY(0); }

.notes-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: clamp(8px, 1vw, 16px) clamp(16px, 2vw, 32px);
  border-bottom: 1px solid rgba(255,255,255,.1);
  font-family: var(--display);
  font-size: clamp(12px, 1.1vw, 16px);
  font-weight: 600;
  color: rgba(255,255,255,.85);
}

.notes-close {
  border: none;
  background: none;
  color: rgba(255,255,255,.6);
  font-size: clamp(14px, 1.2vw, 20px);
  cursor: pointer;
  padding: 4px;
}
.notes-close:hover { color: #fff; }

.notes-content {
  flex: 1;
  overflow-y: auto;
  padding: clamp(12px, 1.4vw, 24px) clamp(16px, 2vw, 32px);
  font-size: clamp(12px, 1.1vw, 17px);
  line-height: 1.6;
  color: rgba(255,255,255,.85);
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .slide-inner { padding: 16px; }
  .controls { padding: 6px 12px; gap: 6px; }
}