/* ============================================================
   slides-eugene — independent self-contained deck styles
   Eugene 口氣版簡報用，不依賴父專案任何檔案
   ============================================================ */

:root {
  --color-surface: oklch(98% 0.01 85);
  --color-surface-alt: oklch(95% 0.02 80);
  --color-ink: oklch(20% 0.02 40);
  --color-ink-soft: oklch(42% 0.02 40);
  --color-accent: oklch(58% 0.16 35);
  --color-accent-soft: oklch(88% 0.08 60);
  --color-line: oklch(86% 0.015 60);
  --color-highlight: oklch(92% 0.13 95);
  --color-ok: oklch(55% 0.14 145);
  --color-bad: oklch(55% 0.17 25);
  --color-warn: oklch(65% 0.16 70);

  --text-xs: clamp(0.85rem, 0.8rem + 0.2vw, 0.95rem);
  --text-sm: clamp(1rem, 0.95rem + 0.3vw, 1.15rem);
  --text-base: clamp(1.15rem, 1rem + 0.6vw, 1.5rem);
  --text-lg: clamp(1.5rem, 1.2rem + 1vw, 2.2rem);
  --text-xl: clamp(2rem, 1.5rem + 2vw, 3.8rem);
  --text-hero: clamp(3rem, 2rem + 4vw, 6rem);

  --space-xs: clamp(0.5rem, 0.4rem + 0.3vw, 0.75rem);
  --space-sm: clamp(1rem, 0.8rem + 0.5vw, 1.5rem);
  --space-md: clamp(1.5rem, 1.2rem + 1vw, 2.5rem);
  --space-lg: clamp(2.5rem, 2rem + 2vw, 4.5rem);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 12% 18%, oklch(92% 0.05 60 / 0.45), transparent 55%),
    radial-gradient(circle at 88% 82%, oklch(90% 0.06 40 / 0.3), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.deck { position: relative; width: 100vw; height: 100vh; z-index: 1; }

.slide {
  position: absolute;
  inset: 0;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.45s var(--ease-out);
  overflow-y: auto;
}

.slide.active { opacity: 1; visibility: visible; }
.slide-inner { max-width: 1100px; margin: 0 auto; width: 100%; }

h1 {
  font-size: var(--text-hero);
  line-height: 0.95;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin-bottom: var(--space-md);
  font-family: "Noto Serif TC", "PingFang TC", serif;
}
h2 {
  font-size: var(--text-xl);
  line-height: 1.15;
  letter-spacing: -0.01em;
  font-weight: 700;
  margin-bottom: var(--space-md);
  font-family: "Noto Serif TC", serif;
}
h3 {
  font-size: var(--text-lg);
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

p, li {
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-ink);
}
ul, ol { padding-left: 1.5em; margin-bottom: var(--space-sm); }
li + li { margin-top: 0.4em; }

strong { color: var(--color-accent); font-weight: 700; }
em {
  font-style: normal;
  background: linear-gradient(180deg, transparent 62%, var(--color-highlight) 62%);
  padding: 0 0.15em;
  font-weight: 600;
}

/* 口語註解用 — Eugene 愛用的碎碎念語氣 */
.casual {
  margin-top: var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  font-style: italic;
  padding-left: var(--space-sm);
  border-left: 3px solid var(--color-accent-soft);
}

.eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  font-weight: 700;
}

.lede {
  font-size: var(--text-lg);
  line-height: 1.45;
  color: var(--color-ink-soft);
  max-width: 34ch;
  margin-bottom: var(--space-md);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  align-items: start;
  margin-top: var(--space-md);
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.card {
  padding: var(--space-md);
  background: var(--color-surface-alt);
  border-radius: 14px;
  border: 1px solid var(--color-line);
  position: relative;
}
.card h3 {
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}
.card p { font-size: var(--text-sm); color: var(--color-ink-soft); }

.bullet-list {
  list-style: none;
  padding-left: 0;
  margin-top: var(--space-sm);
}
.bullet-list li {
  position: relative;
  padding-left: 1.4em;
  font-size: var(--text-base);
}
.bullet-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

.rules { margin-top: var(--space-md); }
.rule-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-line);
}
.rule-row:last-child { border-bottom: none; }
.rule-num {
  font-family: "Noto Serif TC", serif;
  font-size: var(--text-lg);
  color: var(--color-accent);
  font-weight: 700;
  min-width: 2.2ch;
}
.rule-title {
  font-weight: 700;
  font-size: var(--text-base);
  min-width: 8ch;
}
.rule-body {
  color: var(--color-ink-soft);
  flex: 1;
  font-size: var(--text-sm);
  line-height: 1.65;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  margin-top: var(--space-sm);
  margin-bottom: var(--space-sm);
}
th, td {
  padding: 0.8em 1em;
  text-align: left;
  border-bottom: 1px solid var(--color-line);
  vertical-align: top;
}
th {
  background: var(--color-surface-alt);
  font-weight: 700;
}

.hero { text-align: left; }
.brand-mark {
  font-size: var(--text-sm);
  letter-spacing: 0.3em;
  color: var(--color-ink-soft);
  margin-bottom: var(--space-md);
  text-transform: uppercase;
}
.hero-title {
  font-size: var(--text-hero);
  line-height: 0.92;
  font-weight: 800;
  letter-spacing: -0.03em;
}
.hero-title .accent {
  color: var(--color-accent);
  font-style: italic;
  font-family: "Noto Serif TC", serif;
}
.hero-sub {
  margin-top: var(--space-md);
  font-size: var(--text-base);
  color: var(--color-ink-soft);
  max-width: 44ch;
  line-height: 1.6;
}
.hero-meta {
  margin-top: var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  letter-spacing: 0.05em;
}

.section-divider { text-align: center; }
.section-divider .slide-inner { text-align: center; }
.section-divider .number {
  font-size: clamp(6rem, 10vw, 10rem);
  color: var(--color-accent-soft);
  font-family: "Noto Serif TC", serif;
  font-weight: 700;
  line-height: 1;
  opacity: 0.7;
}
.section-divider .title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-top: -0.2em;
  font-family: "Noto Serif TC", serif;
}
.section-divider .lede {
  margin: var(--space-sm) auto 0;
  text-align: center;
}

.callout {
  padding: var(--space-md);
  background: linear-gradient(135deg, var(--color-accent-soft), transparent);
  border-left: 4px solid var(--color-accent);
  border-radius: 8px;
  margin-top: var(--space-md);
}
.callout-label {
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 0.3em;
}
.callout p { font-size: var(--text-sm); line-height: 1.65; }

.timeline {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-xs) var(--space-md);
  font-size: var(--text-sm);
  margin-top: var(--space-md);
}
.time-mark {
  color: var(--color-surface);
  background: var(--color-accent);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  min-width: 2em;
  height: 2em;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  font-size: 0.9rem;
  font-family: "Noto Sans TC", sans-serif;
}

.four-pillars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-md);
}
.pillar {
  background: linear-gradient(180deg, var(--color-surface-alt), transparent);
  border-radius: 12px;
  padding: var(--space-sm);
  border: 1px solid var(--color-line);
  text-align: center;
}
.pillar .p-icon {
  font-size: 2.2rem;
  line-height: 1;
  margin-bottom: 0.4em;
}
.pillar .p-zh {
  font-size: var(--text-base);
  font-weight: 700;
  font-family: "Noto Serif TC", serif;
  color: var(--color-accent);
  margin-bottom: 0.3em;
}
.pillar .p-body {
  font-size: var(--text-xs);
  line-height: 1.55;
  color: var(--color-ink-soft);
}

.group-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-md);
}
.group-card {
  padding: var(--space-sm);
  border-radius: 12px;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-line);
}
.group-card.a { border-top: 4px solid oklch(65% 0.13 220); }
.group-card.b { border-top: 4px solid oklch(65% 0.15 130); }
.group-card.c { border-top: 4px solid oklch(65% 0.17 40); }
.group-card .g-tag {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-soft);
  margin-bottom: 0.3em;
  text-transform: uppercase;
}
.group-card .g-title {
  font-size: var(--text-base);
  font-weight: 700;
  font-family: "Noto Serif TC", serif;
  margin-bottom: 0.3em;
}
.group-card .g-body {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: var(--space-md);
  row-gap: var(--space-sm);
  align-items: start;
  margin-top: var(--space-md);
}
.compare-grid > * { min-width: 0; }
.compare-grid figure {
  margin: 0;
  display: flex;
  flex-direction: column;
}
.compare-grid figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: clamp(180px, 28vh, 280px);
  object-fit: contain;
  border-radius: 6px;
  cursor: zoom-in;
  transition: transform 0.25s var(--ease-out);
  background: var(--color-surface-alt);
}
.compare-grid figure img:hover { transform: scale(1.02); }
.compare-grid figure figcaption {
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
  font-style: italic;
  margin-top: 0.4em;
  line-height: 1.5;
}
.compare-grid .cg-note {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  margin: 0;
}

.compare-origin {
  margin: 0 auto var(--space-sm);
  max-width: 520px;
  text-align: center;
}
.compare-origin img {
  display: block;
  margin: 0 auto;
  width: 100%;
  height: auto;
  max-height: clamp(120px, 18vh, 180px);
  object-fit: contain;
  border-radius: 6px;
  cursor: zoom-in;
  transition: transform 0.25s var(--ease-out);
  background: var(--color-surface-alt);
}
.compare-origin img:hover { transform: scale(1.02); }
.compare-origin figcaption {
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
  font-style: italic;
  margin-top: 0.3em;
  letter-spacing: 0.05em;
}

/* lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1rem, 3vw, 3rem);
  background: oklch(10% 0.01 60 / 0.92);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease-out), visibility 0s linear 0.3s;
  cursor: zoom-out;
}
.lightbox.active {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.3s var(--ease-out), visibility 0s linear 0s;
}
.lightbox img {
  display: block;
  max-width: 95vw;
  max-height: 95vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 20px 60px oklch(0% 0 0 / 0.5);
  transform: scale(0.95);
  transition: transform 0.3s var(--ease-out);
}
.lightbox.active img { transform: scale(1); }
.lightbox-hint {
  position: fixed;
  bottom: var(--space-md);
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--text-xs);
  color: oklch(90% 0.01 60 / 0.7);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  pointer-events: none;
}

/* ========== Day 2 specific components ========== */
.arch {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}
.arch-box {
  padding: var(--space-sm);
  text-align: center;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-radius: 10px;
}
.arch-box .ab-icon { font-size: 2rem; line-height: 1; margin-bottom: 0.2em; }
.arch-box .ab-title { font-size: var(--text-sm); font-weight: 700; }
.arch-box .ab-sub { font-size: 0.75rem; color: var(--color-ink-soft); margin-top: 0.2em; }
.arch-arrow { font-size: var(--text-lg); color: var(--color-accent); font-weight: 700; text-align: center; }

.step-ladder {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-top: var(--space-md);
}
.step-ladder .sl-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-sm);
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-surface-alt);
  border-radius: 8px;
  border-left: 3px solid var(--color-accent);
  font-size: var(--text-sm);
}
.step-ladder .sl-num {
  min-width: 2em;
  height: 2em;
  background: var(--color-accent);
  color: var(--color-surface);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.9rem;
}
.step-ladder .sl-time {
  font-size: 0.8rem;
  color: var(--color-ink-soft);
  font-variant-numeric: tabular-nums;
}

.layer-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-top: var(--space-md);
}
.layer {
  padding: var(--space-sm);
  border-radius: 10px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-sm);
  align-items: center;
  background: var(--color-surface-alt);
  border-left: 4px solid var(--color-accent-soft);
}
.layer.l1 { border-left-color: var(--color-accent-soft); background: linear-gradient(90deg, oklch(94% 0.05 55), var(--color-surface-alt)); }
.layer.l2 { border-left-color: var(--color-accent); background: linear-gradient(90deg, oklch(92% 0.07 50), var(--color-surface-alt)); }
.layer.l3 { border-left-color: oklch(45% 0.15 40); background: linear-gradient(90deg, oklch(90% 0.08 45), var(--color-surface-alt)); }
.layer .layer-num {
  font-family: "Noto Serif TC", serif;
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-accent);
  min-width: 2ch;
}
.layer .layer-title { font-size: var(--text-base); font-weight: 700; }
.layer .layer-desc { font-size: var(--text-sm); color: var(--color-ink-soft); margin-top: 0.2em; }

.journey {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-xs);
  margin-top: var(--space-md);
}
.journey-node {
  padding: var(--space-sm) var(--space-xs);
  background: var(--color-surface-alt);
  border-radius: 10px;
  border: 1px solid var(--color-line);
  text-align: center;
  font-size: 0.75rem;
  position: relative;
}
.journey-node .jn-phase {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--color-ink-soft);
  margin-bottom: 0.3em;
}
.journey-node .jn-body { font-weight: 600; line-height: 1.4; }
.journey-node.climax {
  background: linear-gradient(135deg, var(--color-accent-soft), var(--color-surface-alt));
  border-color: var(--color-accent);
}
.journey-node.climax .jn-phase { color: var(--color-accent); }

.code-block {
  background: var(--color-ink);
  color: oklch(95% 0.02 80);
  padding: var(--space-sm);
  border-radius: 8px;
  font-family: "JetBrains Mono", "SF Mono", Consolas, monospace;
  font-size: 0.8rem;
  line-height: 1.6;
  white-space: pre;
  overflow-x: auto;
}

code {
  font-family: "JetBrains Mono", "SF Mono", Consolas, monospace;
  font-size: 0.9em;
  background: var(--color-surface-alt);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: var(--color-accent);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

/* badges (for chart section labels) */
.badge {
  display: inline-block;
  padding: 0.2em 0.7em;
  background: var(--color-accent);
  color: var(--color-surface);
  border-radius: 99px;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
}
.badge-soft {
  background: var(--color-accent-soft);
  color: var(--color-ink);
}
.badge.ok { background: var(--color-ok); color: var(--color-surface); }
.badge.bad { background: var(--color-bad); color: var(--color-surface); }
.badge.warn { background: var(--color-warn); color: var(--color-ink); }

/* ========== Customer Service specific ========== */
.hex-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-md);
}
.hex-card {
  padding: var(--space-sm);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-radius: 12px;
  position: relative;
}
.hex-card .hex-num {
  position: absolute;
  top: var(--space-xs);
  right: var(--space-sm);
  font-family: "Noto Serif TC", serif;
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-accent-soft);
  line-height: 1;
}
.hex-card .hex-zh {
  font-size: var(--text-base);
  font-weight: 700;
  font-family: "Noto Serif TC", serif;
  color: var(--color-accent);
  margin-bottom: 0.2em;
}
.hex-card .hex-en {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-soft);
  margin-bottom: var(--space-xs);
  text-transform: uppercase;
}
.hex-card .hex-body {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink);
}

.dual-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-top: var(--space-md);
}
.col-yes, .col-no {
  padding: var(--space-sm);
  border-radius: 10px;
  border: 1px solid var(--color-line);
}
.col-yes { background: oklch(97% 0.03 145 / 0.4); border-left: 4px solid var(--color-ok); }
.col-no { background: oklch(97% 0.02 25 / 0.4); border-left: 4px solid var(--color-bad); }
.col-head {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--color-ink);
}
.col-yes ul, .col-no ul { margin-top: 0.3em; padding-left: 1.2em; }
.col-yes li, .col-no li { font-size: var(--text-sm); line-height: 1.6; }

.mapping {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-top: var(--space-md);
}
.mapping-row {
  display: grid;
  grid-template-columns: 12ch auto 1fr;
  gap: var(--space-sm);
  align-items: center;
  padding: var(--space-sm);
  background: var(--color-surface-alt);
  border-radius: 8px;
  border-left: 3px solid var(--color-accent);
}
.map-left {
  font-weight: 700;
  font-family: "Noto Serif TC", serif;
  color: var(--color-accent);
  font-size: var(--text-base);
}
.map-arrow { color: var(--color-accent); font-weight: 700; }
.map-right { font-size: var(--text-sm); line-height: 1.6; color: var(--color-ink); }

.chat {
  background: oklch(98% 0.005 80);
  border: 1px solid var(--color-line);
  border-radius: 10px;
  padding: var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: 0.4em;
  font-size: var(--text-sm);
}
.chat-row {
  display: flex;
  align-items: flex-end;
  gap: 0.5em;
}
.chat-row.me {
  flex-direction: row-reverse;
}
.chat-who {
  font-size: 0.7rem;
  color: var(--color-ink-soft);
  font-variant-numeric: tabular-nums;
  min-width: 3.5em;
  text-align: center;
}
.chat-bubble {
  background: var(--color-surface-alt);
  padding: 0.5em 0.8em;
  border-radius: 12px;
  max-width: 75%;
  line-height: 1.55;
  font-size: var(--text-xs);
}
.chat-row.me .chat-bubble {
  background: var(--color-accent-soft);
  color: var(--color-ink);
}

@media (max-width: 768px) {
  .arch { grid-template-columns: 1fr; }
  .arch-arrow { transform: rotate(90deg); }
  .journey { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .hex-grid { grid-template-columns: 1fr; }
  .dual-col { grid-template-columns: 1fr; }
  .mapping-row { grid-template-columns: 1fr; }
}

.prompt-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 0.25em 0.8em;
  border-radius: 99px;
  margin-bottom: 0.4em;
  letter-spacing: 0.1em;
}
.prompt-label.bad {
  background: oklch(95% 0.03 25);
  color: oklch(45% 0.15 25);
}
.prompt-label.good {
  background: oklch(95% 0.04 145);
  color: oklch(35% 0.13 145);
}

.prompt-box {
  background: oklch(99% 0.005 80);
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-accent);
  border-radius: 8px;
  padding: var(--space-sm);
  font-size: var(--text-sm);
  line-height: 1.75;
  white-space: pre-wrap;
}
.prompt-box.bad {
  border-left-color: var(--color-bad);
  background: oklch(97% 0.02 25 / 0.4);
}
.prompt-box.good {
  border-left-color: var(--color-ok);
  background: oklch(97% 0.025 145 / 0.3);
}

.takeaways {
  list-style: none;
  padding: 0;
  counter-reset: takeaway;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}
.takeaways li {
  counter-increment: takeaway;
  font-size: var(--text-lg);
  line-height: 1.5;
  padding-left: 2.2em;
  position: relative;
}
.takeaways li::before {
  content: counter(takeaway);
  position: absolute;
  left: 0;
  top: 0.1em;
  font-family: "Noto Serif TC", serif;
  font-size: 1.3em;
  font-weight: 700;
  color: var(--color-accent-soft);
  line-height: 1;
}

.progress-bar {
  position: fixed;
  bottom: 0; left: 0;
  height: 3px;
  background: var(--color-accent);
  transition: width 0.3s var(--ease-out);
  z-index: 10;
}
.slide-indicator {
  position: fixed;
  bottom: var(--space-sm);
  right: var(--space-sm);
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
  font-variant-numeric: tabular-nums;
  background: var(--color-surface);
  padding: 0.35em 0.9em;
  border-radius: 99px;
  border: 1px solid var(--color-line);
  z-index: 10;
}
.help-hint {
  position: fixed;
  bottom: var(--space-sm);
  left: var(--space-sm);
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
  z-index: 10;
  opacity: 0.6;
}

.speaker-notes { display: none; }

@media (max-width: 768px) {
  .grid-2, .grid-3, .four-pillars, .group-grid, .compare-grid {
    grid-template-columns: 1fr;
  }
}

@media print {
  .slide {
    position: relative;
    opacity: 1;
    visibility: visible;
    page-break-after: always;
    height: 100vh;
  }
  .progress-bar, .slide-indicator, .help-hint { display: none; }
}