/* ── Variables — PageMint Design System ── */
:root {
  --font-sans: 'Inter', 'Noto Sans KR', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  /* Brand colors from AppColors */
  --accent: #6DE1D2;          /* primary — Mint */
  --accent-light: #A2F0E6;    /* aiAccentLight */
  --accent-dark: #52C4B5;     /* primaryDark */
  --accent-dim: rgba(109, 225, 210, 0.12);
  --secondary: #FFD63A;       /* Sunny Yellow */
  --orange: #FFA955;           /* Warm Orange / warning */
  --red: #F75A5A;              /* Coral / error */
  --green: #34D399;            /* success */
  --blue: #74B9FF;
  --radius: 12px;
  --radius-sm: 6px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Dark Theme (default) — matches AppColors dark ── */
[data-theme="dark"] {
  --bg: #0D0F14;               /* darkBg */
  --bg-surface: #161B27;       /* darkSurface */
  --bg-card: #1E2538;          /* darkCard */
  --text: #E2E8F0;             /* darkTextPrimary */
  --text-secondary: #94A3B8;   /* darkTextSecondary */
  --border: #2D3748;           /* darkBorder */
  --code-bg: #161B27;
}

/* ── Light Theme — matches AppColors light ── */
[data-theme="light"] {
  --bg: #EFF2F7;               /* lightBg */
  --bg-surface: #FFFFFF;       /* lightSurface */
  --bg-card: #F5F7FA;          /* lightCard */
  --text: #0F172A;             /* lightTextPrimary */
  --text-secondary: #334155;   /* lightTextSecondary */
  --border: #CBD5E1;           /* lightBorder */
  --code-bg: #F5F7FA;
}


/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Slides Container ── */
.slides-container { position: relative; width: 100%; height: 100%; }
.slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateX(60px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.slide.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}
.slide.exit-left { transform: translateX(-60px); opacity: 0; }
.slide.exit-right { transform: translateX(60px); opacity: 0; }
.slide.enter-right { transform: translateX(60px); }
.slide.enter-left { transform: translateX(-60px); }

/* ── Slide Content ── */
.slide__content {
  max-width: 1400px;
  width: 92%;
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 3rem 4rem;
}
.slide__content--wide { max-width: 1600px; width: 94%; }

h1 {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.subtitle {
  font-size: clamp(1.15rem, 1.8vw, 1.4rem);
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

/* ── Title Slide ── */
.slide--title .slide__content { text-align: center; }
.title-badge {
  display: inline-block;
  padding: 0.5rem 1.5rem;
  color: var(--accent-light);
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  margin-bottom: 2.5rem;
}
.title-main {
  font-family: 'Noto Sans KR', sans-serif;
  font-weight: 900 !important;
  font-size: clamp(4rem, 8vw, 7rem) !important;
  background: linear-gradient(135deg, var(--accent-light), var(--accent), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 2rem;
}
.title-sub {
  font-size: clamp(1.4rem, 2.5vw, 1.8rem);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 3rem;
}
.title-sub strong {
  color: var(--accent);
  font-weight: 700;
}
.title-meta {
  display: flex;
  justify-content: center;
  gap: 1rem;
  font-size: 1.15rem;
  color: var(--text-secondary);
}
.title-meta .sep { opacity: 0.3; }

/* ── Cards ── */
.card-grid { display: grid; gap: 1.5rem; margin: 2rem 0; }
.card-grid--3col { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.card h3 { font-size: 1.25rem; margin-bottom: 0.6rem; }
.card p { font-size: 1.05rem; color: var(--text-secondary); line-height: 1.6; }
.card-icon {
  display: block;
  font-size: 0.8rem;
  color: var(--accent-light);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

/* ── Quote ── */
.quote {
  text-align: center;
  font-size: 1.2rem;
  color: var(--text-secondary);
  padding: 2rem;
  border-left: 3px solid var(--accent);
  background: var(--accent-dim);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-top: 2rem;
  line-height: 1.8;
}
.quote strong { color: var(--accent-light); }

/* ── Phase Screenshots ── */
.phase-screenshots {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.2rem;
  margin: 2rem 0;
}
.phase-screenshot-item {
  text-align: center;
}
.phase-screenshot-item .phase-num {
  font-size: 0.8rem;
  color: var(--accent-light);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.2rem;
}
.phase-screenshot-item .phase-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
}
.phase-screenshot-item .phase-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-top: 0.8rem;
}
.phase-screenshot-item img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: center;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.phase-screenshot-item img:hover {
  transform: scale(1.03);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

/* ── Phase Flow ── */
.phase-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin: 2rem 0;
  flex-wrap: wrap;
}
.phase-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.5rem;
  text-align: center;
  min-width: 140px;
}
.phase-num { font-size: 0.85rem; color: var(--accent-light); font-weight: 500; text-transform: uppercase; letter-spacing: 0.1em; }
.phase-name { font-size: 1.4rem; font-weight: 700; margin: 0.4rem 0; }
.phase-desc { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.5; }
.phase-arrow { font-size: 1.5rem; color: var(--text-secondary); }

/* ── Persona Grid ── */
.persona-grid { display: grid; gap: 1rem; margin: 1rem 0; }
.persona-grid--main { grid-template-columns: repeat(4, 1fr); }
.persona-grid--sub { grid-template-columns: repeat(5, 1fr); margin-top: 0.5rem; }
.persona-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 0.75rem;
  margin: 0 4px;
  text-align: center;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.persona-card--active {
  box-shadow: 0 0 20px rgba(109, 225, 210, 0.1);
}
.persona-card--active:hover { box-shadow: 0 0 30px rgba(109, 225, 210, 0.2); }
.persona-card--active h3 { color: var(--text); }
.persona--hermes { border-color: var(--accent); }
.persona--hermes .persona-role { color: var(--accent); }
.persona--apollo { border-color: var(--secondary); }
.persona--apollo .persona-role { color: var(--secondary); }
.persona--athena { border-color: var(--green); }
.persona--athena .persona-role { color: var(--green); }
.persona--pygmalion { border-color: var(--blue); }
.persona--pygmalion .persona-role { color: var(--blue); }
.persona--sub {
  opacity: 0.55;
  padding: 0.8rem;
  transition: opacity var(--transition);
}
.persona--sub:hover { opacity: 0.85; }
.persona--sub h3 { font-size: 0.85rem; margin-bottom: 0.1rem; }
.persona--sub .persona-role { font-size: 0.7rem; color: var(--text-secondary); }
.persona-avatar {
  width: 48px; height: 48px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.1rem;
  margin: 0 auto 0.75rem;
}
.persona-avatar--sub {
  width: 36px; height: 36px;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  background: rgba(109, 225, 210, 0.08);
  color: var(--text-secondary);
}
.persona--hermes .persona-avatar { background: rgba(109,225,210,0.2); color: var(--accent); }
.persona--apollo .persona-avatar { background: rgba(255,214,58,0.2); color: var(--secondary); }
.persona--athena .persona-avatar { background: rgba(52,211,153,0.2); color: var(--green); }
.persona--pygmalion .persona-avatar { background: rgba(116,185,255,0.2); color: var(--blue); }
.persona-card {
  transform-style: preserve-3d;
  will-change: transform;
  position: relative;
  overflow: hidden;
  cursor: default;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.persona-card h3 { font-size: 1.5rem; margin-bottom: 0.3rem; }

/* ── Persona Wrapper + Sub Cards ── */
.persona-wrapper {
  position: relative;
}
.persona-sub-cards {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  margin-top: 20px;
  white-space: nowrap;
}
.persona-sub-card {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 0.4rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.model-logo {
  width: 14px;
  height: 14px;
  opacity: 0.7;
  filter: invert(1);
}
.persona-sub--hermes { border-color: rgba(109,225,210,0.4); }
.persona-sub--apollo { border-color: rgba(255,214,58,0.4); }
.persona-sub--athena { border-color: rgba(52,211,153,0.4); }
.persona-sub--pygmalion { border-color: rgba(116,185,255,0.4); }

/* ── Persona Workflow Flow ── */
.persona-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  margin-top: 2rem;
  padding: 1.2rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.persona-flow-step {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.persona-flow-step span {
  font-size: 0.95rem;
  color: var(--text-secondary);
}
.persona-flow-icon {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.8rem;
  flex-shrink: 0;
}
.persona--hermes-bg { background: rgba(109,225,210,0.2); color: var(--accent); }
.persona--apollo-bg { background: rgba(255,214,58,0.2); color: var(--secondary); }
.persona--athena-bg { background: rgba(52,211,153,0.2); color: var(--green); }
.persona--pygmalion-bg { background: rgba(116,185,255,0.2); color: var(--blue); }
.persona-flow-arrow {
  font-size: 1.3rem;
  color: var(--text-secondary);
  opacity: 0.5;
}
.persona-role { font-size: 1.1rem; color: var(--accent); font-weight: 500; margin-bottom: 0.6rem; }
.persona-card p { font-size: 1.1rem; color: var(--text-secondary); line-height: 1.5; }

/* ── Constraints Compare ── */
.constraint-compare { display: flex; align-items: stretch; gap: 1rem; margin: 1.5rem 0; }
.constraint-box {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.constraint-box h3 { font-size: 1.15rem; margin-bottom: 1rem; }
.constraint-box ul { list-style: none; }
.constraint-box li { font-size: 1.05rem; color: var(--text-secondary); padding: 0.4rem 0; line-height: 1.6; }
.constraint-box code { font-family: var(--font-mono); font-size: 0.8rem; color: var(--orange); }
.constraint-result {
  margin-top: 1rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 500;
}
.constraint--cultural .constraint-result { background: rgba(108,92,231,0.15); color: var(--accent-light); }
.constraint--programmatic .constraint-result { background: rgba(0,184,148,0.15); color: var(--green); }
.constraint-vs { font-size: 1.5rem; color: var(--text-secondary); display: flex; align-items: center; }

/* ── Architecture Chain ── */
.arch-chain {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin: 1.5rem 0;
  flex-wrap: wrap;
}
.arch-node {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.7rem;
  text-align: center;
  min-width: 140px;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.arch-node {
  transform-style: preserve-3d;
  will-change: transform;
  position: relative;
  overflow: hidden;
}
.arch-node .card-glare,
.persona-card .card-glare {
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: linear-gradient(
    115deg,
    transparent 20%,
    rgba(109,225,210,0.35) 36%,
    rgba(116,185,255,0.3) 44%,
    rgba(162,240,230,0.25) 50%,
    rgba(109,225,210,0.2) 56%,
    transparent 70%
  );
  background-size: 200% 200%;
  mix-blend-mode: color-dodge;
  filter: brightness(1.1) opacity(0);
  pointer-events: none;
  transition: filter 0.4s ease;
}
.arch-node:hover .card-glare,
.persona-card:hover .card-glare {
  filter: brightness(1.2) opacity(0.9);
}
.arch-label {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent-light);
  letter-spacing: 0.1em;
}
.arch-node-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 0.3rem;
}
.arch-icon {
  font-size: 1.4rem;
  opacity: 0.7;
}
.arch--p6 .arch-icon { color: var(--blue); }
.arch--p5 .arch-icon { color: var(--green); }
.arch--p4 .arch-icon { color: var(--orange); }
.arch--p1 .arch-icon { color: var(--secondary); }
.arch--p2 .arch-icon { color: var(--red); }
.arch--p3 .arch-icon { color: var(--accent); }

/* Stitch logo in arch-tech */
.stitch-logo { height: 0.9em; width: auto; vertical-align: -0.1em; display: inline; }

/* OpenCode square icon in arch header */
img.opencode-icon { height: 1.4rem; width: 1.4rem; border-radius: 4px; opacity: 0.85; vertical-align: middle; }

/* OpenCode wordmark in arch-name row */
img.opencode-wordmark { height: 1rem; width: auto; vertical-align: middle; }
.arch-tech img.opencode-wordmark { height: 0.75rem; }
[data-theme="dark"] .opencode-logo--light { display: none; }
[data-theme="dark"] .opencode-logo--dark  { display: inline; }
[data-theme="light"] .opencode-logo--dark  { display: none; }
[data-theme="light"] .opencode-logo--light { display: inline; }
.arch-name { font-size: 1.15rem; font-weight: 700; margin: 0.3rem 0; }
.arch-tech { font-size: 0.9rem; color: var(--text-secondary); }
.arch-tech-prefix { font-size: 0.5rem; opacity: 0.6; }
.arch-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 0.5rem;
  font-size: 0.7rem;
  color: var(--text-secondary);
}
.arch--p6 { border-color: var(--blue); }
.arch--p5 { border-color: var(--green); }
.arch--p4 { border-color: var(--orange); }
.arch--p3 { border-color: var(--accent); }

/* ── Full Architecture V2 ── */
.arch-full-v2 {
  display: flex;
  align-items: center;
  gap: 0;
  margin: 2.5rem 0;
}
.arch-row {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.arch-fork {
  display: flex;
  flex-direction: column;
  gap: 4rem;
  margin-left: 1.5rem;
}
.arch-fork-branch {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.arch-fork-branch .arch-node {
  min-width: 220px;
  max-width: 220px;
}
.arch-fork-arrow {
  width: 100px;
  height: 50px;
  flex-shrink: 0;
}
.arch-fork-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  white-space: nowrap;
  margin-right: 0.5rem;
  margin-left: 10px;
}
.arch--p1 { border-color: var(--secondary); }
.arch--p2 { border-color: var(--red); }

/* ── Architecture Node Wrapper + Sub Cards ── */
.arch-node-wrapper {
  position: relative;
}
.arch-node-wrapper > .arch-node {
  display: block;
}
.arch-sub-cards {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  margin-top: 15px;
  white-space: nowrap;
}
.arch-sub-card {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 0.25rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--transition), color var(--transition);
}
.arch-sub-card i { font-size: 0.75rem; color: var(--blue); }
.arch-sub-card:hover { border-color: var(--accent); color: var(--accent-light); }
.arch-sub-card--db { cursor: default; }
.arch-sub-card--db i { color: var(--green); }

.arch-meta {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 2rem;
}
.arch-meta-item { text-align: center; }
.meta-value { font-size: 2rem; font-weight: 700; color: var(--accent-light); }
.meta-label { font-size: 0.8rem; color: var(--text-secondary); }

/* ── Pipeline ── */
.pipeline { margin: 1.5rem 0; }
.pipeline-step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.5rem;
  margin-bottom: 1rem;
}
.pipeline-header { font-size: 0.85rem; font-weight: 700; color: var(--accent-light); margin-bottom: 0.75rem; }
.pipeline-flow {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.pipe-node {
  background: var(--bg-surface);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  white-space: nowrap;
}
.pipe-arrow { color: var(--text-secondary); }

.event-types { margin-top: 1.5rem; }
.event-types h3 { font-size: 1rem; margin-bottom: 0.75rem; }
.event-grid { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.event-tag {
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
}
.event--core { background: rgba(108,92,231,0.15); color: var(--accent-light); }
.event--system { background: rgba(144,144,168,0.15); color: var(--text-secondary); }
.event--interactive { background: rgba(253,203,110,0.15); color: var(--orange); }
.event--meta { background: rgba(0,184,148,0.15); color: var(--green); }

/* ── Metadata Compare ── */
.metadata-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin: 1.5rem 0; }
.meta-approach {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.meta-approach h3 { font-size: 1rem; margin-bottom: 1rem; }
.meta-approach pre {
  background: var(--code-bg);
  border-radius: var(--radius-sm);
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 0.75rem;
}
.meta-approach code { font-family: var(--font-mono); font-size: 0.8rem; line-height: 1.6; }
.approach-verdict { font-size: 0.85rem; font-weight: 500; }
.meta--bad .approach-verdict { color: var(--red); }
.meta--good .approach-verdict { color: var(--green); }

/* ── Challenge Grid ── */
.challenge-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; margin: 2rem 0; }
.challenge-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.challenge-card h3 { font-size: 1.25rem; margin-bottom: 0.75rem; }
.challenge-card p { font-size: 1.05rem; color: var(--text-secondary); line-height: 1.6; }
.challenge-card ul { list-style: none; }
.challenge-card li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 0.3rem 0;
  padding-left: 1.2rem;
  position: relative;
  line-height: 1.5;
}
.challenge-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65rem;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
}

.code-block { margin-top: 1.5rem; }
.code-block pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.5rem;
  overflow-x: auto;
}
.code-block code { font-family: var(--font-mono); font-size: 0.8rem; line-height: 1.7; color: var(--text-secondary); }

/* ── Research Schema ── */
.research-schema {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  margin: 1.5rem auto;
  max-width: 600px;
}
.schema-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  width: 100%;
  text-align: center;
}
.schema-block h4 { font-size: 1rem; color: var(--accent-light); margin-bottom: 0.3rem; }
.schema-block p { font-size: 0.85rem; color: var(--text-secondary); }
.schema-block--output { border-color: var(--green); }
.schema-block--output h4 { color: var(--green); }
.schema-arrow { font-size: 1.2rem; color: var(--text-secondary); padding: 0.3rem 0; }

/* ── Dev Flow ── */
.dev-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin: 1.5rem 0;
}
.dev-step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  text-align: center;
  min-width: 150px;
}
.dev-icon { font-size: 0.7rem; color: var(--accent-light); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 0.5rem; }
.dev-step h4 { font-size: 1.1rem; margin-bottom: 0.4rem; }
.dev-step p { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.5; }
.dev-arrow { font-size: 1.5rem; color: var(--text-secondary); }

.dev-result {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin: 2rem 0 1rem;
}
.result-stat { text-align: center; }
.stat-value { font-size: 2.5rem; font-weight: 700; color: var(--accent-light); }
.stat-label { font-size: 0.8rem; color: var(--text-secondary); }

/* ── Orchestration Slide (3-col layout) ── */
.orch-layout {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5rem;
  width: 100%;
  margin-top: 0.5rem;
}

/* Side panels */
.orch-side {
  flex: 0 0 180px;
}
.orch-side-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: none;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.7rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border);
}
.orch-side-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.orch-side-list li {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}
.orch-side-file {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
}
.orch-side-desc {
  font-size: 0.65rem;
  color: var(--text-secondary);
  line-height: 1.3;
}
.orch-side-link {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  text-decoration: none;
  color: inherit;
  transition: color 0.2s ease;
}
.orch-side-link:hover .orch-side-file { color: var(--accent); }
.orch-side-screenshot {
  width: 150%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin-top: 0.35rem;
  opacity: 0.85;
  transition: opacity 0.2s ease;
}
.orch-side-screenshot:hover { opacity: 1; }
.orch-side-group { margin-bottom: 0.6rem; }
.orch-side-group:last-child { margin-bottom: 0; }
.orch-side-group-label {
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.35rem;
  opacity: 0.7;
}

/* Center orbit — fixed size matching original */
.orch-orbit {
  position: relative;
  flex: 0 0 90vh;
  max-width: calc(100% - 400px);
  height: 62vh;
}

/* SVG connectors — full coverage behind nodes */
.orch-orbit-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* Center Hub — P0 */
.orch-o-hub {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  background: linear-gradient(135deg, var(--bg-card), rgba(109,225,210,0.12));
  border: 2px solid var(--accent);
  border-radius: 50%;
  width: 160px;
  height: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 40px rgba(109,225,210,0.18), 0 0 80px rgba(109,225,210,0.06);
}
.orch-o-hub-badge {
  font-size: 1.1rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  margin: 0.1rem 0;
}
.orch-o-hub-claude {
  height: 1rem;
  width: auto;
}
.orch-o-hub-name { font-size: 0.8rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.15em; color: var(--accent); }
.orch-o-hub-sub {
  font-size: 0.6rem;
  color: var(--text-secondary);
}

/* X-positioned arch-node cards at 4 corners */
.orch-o-pos--tl,
.orch-o-pos--tr,
.orch-o-pos--br,
.orch-o-pos--bl {
  position: absolute;
  z-index: 1;
}
.orch-o-pos--tl { top: 0;    left: 0;    }
.orch-o-pos--tr { top: 0;    right: 0;   }
.orch-o-pos--br { bottom: 0; right: 0;   }
.orch-o-pos--bl { bottom: 0; left: 0;    }
.orch-orbit .arch-node { width: 215px; box-sizing: border-box; }

/* Pipeline steps */
.orch-pipeline {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  flex-wrap: nowrap;
}
.orch-pip {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  white-space: nowrap;
}
.orch-pip--done {
  background: rgba(109,225,210,0.12);
  border-color: var(--accent);
  color: var(--accent);
}
.orch-pip--active {
  background: rgba(255,214,58,0.12);
  border-color: var(--secondary);
  color: var(--secondary);
  animation: pipPulse 1.5s ease-in-out infinite;
}
.orch-pip--pending {
  opacity: 0.35;
}
.orch-pip-arrow {
  font-size: 0.6rem;
  color: var(--text-secondary);
  opacity: 0.6;
}
.orch-pip-arrow--dim { opacity: 0.25; }

@keyframes pipPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255,214,58,0.3); }
  50% { box-shadow: 0 0 8px 2px rgba(255,214,58,0.2); }
}


/* ── Routing ── */
.routing-flow {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 1rem;
  margin: 2rem 0;
}
.routing-step {
  flex: 1;
  max-width: 350px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
}
.routing-step h3 { margin-bottom: 0.75rem; }
.model-badge {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin-bottom: 0.75rem;
}
.routing--nano .model-badge { background: rgba(144,144,168,0.15); color: var(--text-secondary); }
.routing--opus .model-badge { background: rgba(108,92,231,0.15); color: var(--accent-light); }
.routing-step p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0.75rem; }
.cost-indicator { font-size: 0.85rem; font-weight: 500; }
.routing--nano .cost-indicator { color: var(--green); }
.routing--opus .cost-indicator { color: var(--orange); }
.routing-arrow { font-size: 2rem; color: var(--text-secondary); display: flex; align-items: center; }

/* ── Stack Grid ── */
.stack-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; margin: 2rem 0; }
.stack-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.stack-card h3 { font-size: 1.15rem; margin-bottom: 0.75rem; }
.stack-items { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.75rem; }
.stack-items span {
  background: var(--bg-surface);
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: var(--font-mono);
}
.stack-why { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.5; }

/* ── Compaction ── */
.compaction-flow { margin: 1.5rem 0; }
.compact-before, .compact-after {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.5rem;
}
.compact-before h3, .compact-after h3 { font-size: 0.9rem; margin-bottom: 0.75rem; }
.compact-before p, .compact-after p { font-size: 0.8rem; color: var(--text-secondary); margin-top: 0.5rem; }
.compact-arrow {
  text-align: center;
  padding: 0.75rem;
  font-size: 0.85rem;
  color: var(--accent-light);
  font-weight: 500;
}
.context-bar { display: flex; gap: 2px; height: 32px; border-radius: var(--radius-sm); overflow: hidden; }
.ctx-segment {
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; font-weight: 500;
}
.ctx--chat { background: rgba(108,92,231,0.3); color: var(--accent-light); }
.ctx--research { background: rgba(253,203,110,0.3); color: var(--orange); }
.ctx--storyboard { background: rgba(0,184,148,0.3); color: var(--green); }
.ctx--html { background: rgba(116,185,255,0.3); color: var(--blue); }
.ctx--free { background: rgba(144,144,168,0.1); color: var(--text-secondary); }

/* ── Demo Links ── */
.demo-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin: 2rem 0;
}
.demo-link-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 3rem;
  text-align: center;
  text-decoration: none;
  color: var(--text);
  transition: border-color var(--transition), transform var(--transition);
}
.demo-link-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.demo-link-icon {
  font-size: 0.75rem;
  color: var(--accent-light);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.5rem;
}
.demo-link-card h3 { font-size: 1.2rem; margin-bottom: 0.3rem; }
.demo-link-card p { font-size: 0.85rem; color: var(--text-secondary); }

/* ── Opportunity Grid ── */
.opportunity-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin: 1.5rem 0; }
.opp-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color var(--transition);
}
.opp-card:hover { border-color: var(--accent); }
.opp-card h3 { font-size: 1rem; margin-bottom: 0.5rem; }
.opp-card p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; }

/* ── Closing ── */
.slide--closing .slide__content { text-align: center; }
.slide--closing h1 {
  font-size: clamp(2rem, 4vw, 3rem) !important;
  line-height: 1.3;
  margin-bottom: 2rem;
}
.closing-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin: 2rem 0;
}
.closing-stat .stat-value { font-size: 2.5rem; }
.closing-cta {
  margin: 2rem 0 1rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent-light);
}
.closing-thanks {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-top: 2rem;
}

/* ── Homepage Frame ── */
.homepage-frame {
  position: relative;
  display: inline-block;
}
.homepage-img {
  max-width: 90%;
  max-height: 80vh;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  object-fit: contain;
  display: block;
  margin: 0 auto;
}
.homepage-img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: center;
}
.homepage-handwriting {
  position: absolute;
  top: 15%;
  left: 0%;
  transform: rotate(-20deg);
  font-family: 'Caveat', 'Nanum Pen Script', cursive;
  font-size: clamp(3.5rem, 7vw, 6rem);
  font-weight: 700;
  color: var(--secondary);
  text-align: left;
  line-height: 1.4;
  text-shadow:
    0 2px 0 rgba(0, 0, 0, 0.8),
    0 4px 8px rgba(0, 0, 0, 0.6),
    0 0 40px rgba(0, 0, 0, 0.4);
  -webkit-text-stroke: 0.5px rgba(0, 0, 0, 0.3);
  pointer-events: none;
}
.homepage-handwriting strong {
  font-size: 1.2em;
  color: var(--accent-light);
}
.homepage-cursor {
  position: absolute;
  bottom: 15%;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 300;
  color: var(--accent);
  animation: blink 1s step-end infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ── Theme Toggle ── */
.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 100;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: background var(--transition);
}
.theme-toggle:hover { background: var(--bg-card); }
.theme-toggle svg { width: 18px; height: 18px; stroke: var(--text); fill: none; stroke-width: 2; }

/* ── Progress Bar ── */
.progress-bar {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--border);
  z-index: 100;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--secondary));
  width: 0;
  transition: width 0.4s ease;
}

/* ── Slide Counter ── */
.slide-counter {
  position: fixed;
  bottom: 1.5rem;
  right: 2rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  z-index: 100;
}

/* ── Navigation ── */
.slide-nav {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.5rem;
  z-index: 100;
}
.slide-nav button {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--text);
  transition: background var(--transition);
}
.slide-nav button:hover:not(:disabled) { background: var(--bg-card); }
.slide-nav button:disabled { opacity: 0.3; cursor: default; }

/* ── Animations ── */
.animate-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}
.slide.active .animate-in:nth-child(1) { animation-delay: 0s; }
.slide.active .animate-in:nth-child(2) { animation-delay: 0.1s; }
.slide.active .animate-in:nth-child(3) { animation-delay: 0.2s; }
.slide.active .animate-in:nth-child(4) { animation-delay: 0.3s; }
.slide.active .animate-in:nth-child(5) { animation-delay: 0.4s; }
.slide.active .animate-in:nth-child(6) { animation-delay: 0.5s; }

@keyframes fadeInUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .slide__content { padding: 1.5rem; }
  .card-grid--3col { grid-template-columns: 1fr; }
  .persona-grid--main { grid-template-columns: repeat(2, 1fr); }
  .persona-grid--sub { grid-template-columns: repeat(3, 1fr); }
  .constraint-compare { flex-direction: column; }
  .arch-chain { gap: 0.5rem; }
  .metadata-compare { grid-template-columns: 1fr; }
  .challenge-grid { grid-template-columns: 1fr; }
  .stack-grid { grid-template-columns: 1fr; }
  .opportunity-grid { grid-template-columns: 1fr; }
  .routing-flow { flex-direction: column; align-items: center; }
  .routing-arrow { transform: rotate(90deg); }
  .phase-flow { flex-direction: column; }
  .phase-arrow { transform: rotate(90deg); }
  .dev-flow { flex-direction: column; }
  .dev-arrow { transform: rotate(90deg); }
  .orch-orbit { height: 50vh; }
  .orch-o-hub { width: 110px; height: 110px; }
  .orch-o-hub-name { font-size: 0.9rem; }
  .demo-links { flex-direction: column; align-items: center; }
  .closing-stats { gap: 1.5rem; flex-wrap: wrap; }
  .arch-meta { gap: 1.5rem; flex-wrap: wrap; }
  .slide-nav { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .animate-in { animation-duration: 0.01ms !important; }
  .slide { transition-duration: 0.01ms !important; }
}