/* Apple-inspired design system */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #000;
  --bg-soft: #0a0a0a;
  --bg-card: #111113;
  --fg: #f5f5f7;
  --fg-muted: #a1a1a6;
  --fg-dim: #6e6e73;
  --accent: #0a84ff;
  --accent-2: #bf5af2;
  --accent-3: #30d158;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.15);
}

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-width: 1280px;
  overflow-x: hidden;
  letter-spacing: -0.01em;
}

a { color: inherit; text-decoration: none; }

/* Navbar */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  background: rgba(10,10,10,0.72);
  border-bottom: 1px solid var(--border);
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-inner {
  width: 1180px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
}
.nav-brand {
  font-weight: 600;
  letter-spacing: -0.01em;
}
.nav-brand .dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  margin-right: 10px;
  vertical-align: middle;
  box-shadow: 0 0 12px rgba(10,132,255,0.6);
}
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  color: var(--fg-muted);
  transition: color 0.2s ease;
  font-weight: 400;
}
.nav-links a:hover { color: var(--fg); }
.nav-links a.active { color: var(--fg); }

.nav-cta {
  font-size: 12px;
  color: var(--fg-muted);
}
.nav-cta a { color: var(--accent); font-weight: 500; }

/* Channel banner */
.channel-banner {
  padding-top: 88px;
  padding-bottom: 24px;
  text-align: center;
  font-size: 14px;
  color: var(--fg-muted);
  letter-spacing: 0.02em;
}
.channel-banner a {
  background: linear-gradient(135deg, #ff3b30, #ff9500);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 600;
  position: relative;
  transition: opacity 0.2s;
}
.channel-banner a:hover { opacity: 0.8; }

/* Sections */
.section {
  padding: 80px 0 120px;
  display: flex;
  justify-content: center;
}
.container {
  width: 1180px;
}
.eyebrow {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 20px;
}
h1.hero {
  font-size: 84px;
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 700;
  margin-bottom: 28px;
  background: linear-gradient(180deg, #fff 0%, #a1a1a6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
h2.section-title {
  font-size: 56px;
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 700;
  margin-bottom: 20px;
}
h3 {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
p.lead {
  font-size: 22px;
  line-height: 1.45;
  color: var(--fg-muted);
  max-width: 820px;
  font-weight: 400;
}
p.body {
  font-size: 17px;
  line-height: 1.6;
  color: var(--fg-muted);
}

/* Hero */
.hero-wrap {
  text-align: center;
  padding: 60px 0 120px;
}
.hero-wrap .eyebrow { display: inline-block; }
.hero-wrap p.lead { margin: 0 auto; }
.gradient-word {
  background: linear-gradient(135deg, #0a84ff 0%, #bf5af2 50%, #ff375f 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Hero visual */
.hero-visual {
  margin-top: 70px;
  display: flex;
  justify-content: center;
  gap: 20px;
  perspective: 1200px;
}
.orb {
  width: 240px;
  height: 240px;
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(10,132,255,0.15), rgba(191,90,242,0.15));
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 500;
  color: var(--fg);
  flex-direction: column;
  padding: 28px;
  transition: transform 0.6s cubic-bezier(.2,.8,.2,1), box-shadow 0.6s ease, border-color 0.4s ease;
  position: relative;
  overflow: hidden;
}
.orb::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(10,132,255,0.35), transparent 60%);
  opacity: 0.7;
  transition: opacity 0.5s;
}
.orb:hover {
  transform: translateY(-8px) rotateX(4deg);
  border-color: rgba(10,132,255,0.5);
  box-shadow: 0 30px 80px -20px rgba(10,132,255,0.35);
}
.orb:hover::before { opacity: 1; }
.orb .orb-num {
  font-size: 48px;
  font-weight: 700;
  background: linear-gradient(135deg, #fff, #a1a1a6);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
  z-index: 1;
  position: relative;
}
.orb .orb-label {
  z-index: 1;
  position: relative;
  color: var(--fg-muted);
  font-size: 13px;
  text-align: center;
}

/* Cards grid */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.cards.two { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 36px 32px;
  transition: transform 0.4s cubic-bezier(.2,.8,.2,1), border-color 0.3s, background 0.3s, box-shadow 0.4s;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}
.card:hover {
  transform: translateY(-6px);
  border-color: var(--border-strong);
  background: #141416;
  box-shadow: 0 30px 70px -30px rgba(0,0,0,0.8);
}
.card:hover::before { opacity: 1; }
.card .num {
  font-size: 14px;
  color: var(--fg-dim);
  font-weight: 500;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.card h3 {
  font-size: 22px;
  margin-bottom: 12px;
}
.card p {
  font-size: 15px;
  line-height: 1.55;
  color: var(--fg-muted);
}
.card .icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(10,132,255,0.25), rgba(191,90,242,0.25));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
  border: 1px solid var(--border-strong);
}

/* Stat strip */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-top: 60px;
}
.stat {
  padding: 40px 24px;
  border-right: 1px solid var(--border);
  text-align: center;
  transition: background 0.3s;
}
.stat:last-child { border-right: none; }
.stat:hover { background: rgba(255,255,255,0.02); }
.stat-num {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #0a84ff, #bf5af2);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}
.stat-label {
  font-size: 13px;
  color: var(--fg-muted);
  letter-spacing: 0.01em;
}

/* Feature split */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-top: 60px;
}
.split .visual {
  aspect-ratio: 4/3;
  border-radius: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 32px;
  position: relative;
  overflow: hidden;
}

/* Code */
pre.code {
  background: #0d0d10;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px 28px;
  font-family: "SF Mono", Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
  line-height: 1.6;
  color: #e2e2e7;
  overflow-x: auto;
  margin-top: 20px;
}
pre.code .k { color: #ff9f0a; }
pre.code .s { color: #30d158; }
pre.code .c { color: var(--fg-dim); font-style: italic; }
pre.code .p { color: #64d2ff; }

/* Tables */
.table-wrap {
  margin-top: 40px;
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  background: var(--bg-card);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
th, td {
  padding: 18px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th {
  background: rgba(255,255,255,0.02);
  font-size: 12px;
  font-weight: 600;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
tr:last-child td { border-bottom: none; }
tr { transition: background 0.2s; }
tbody tr:hover { background: rgba(255,255,255,0.025); }
td code {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 6px;
  font-family: "SF Mono", Menlo, monospace;
  font-size: 12px;
  color: #64d2ff;
}
td.good { color: var(--accent-3); font-weight: 500; }
td.mid { color: #ff9f0a; font-weight: 500; }
td.bad { color: #ff453a; font-weight: 500; }

/* Progressive disclosure bars */
.disclosure {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.disc-row {
  display: grid;
  grid-template-columns: 100px 1fr 180px;
  gap: 24px;
  align-items: center;
  padding: 24px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: transform 0.3s, border-color 0.3s, background 0.3s;
}
.disc-row:hover {
  transform: translateX(6px);
  border-color: rgba(10,132,255,0.4);
  background: #141416;
}
.disc-level {
  font-weight: 700;
  font-size: 18px;
  color: var(--fg);
}
.disc-bar {
  height: 8px;
  background: rgba(255,255,255,0.06);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}
.disc-bar .fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 4px;
  transition: width 0.6s cubic-bezier(.2,.8,.2,1);
}
.disc-cost {
  font-size: 13px;
  color: var(--fg-muted);
  text-align: right;
  font-family: "SF Mono", Menlo, monospace;
}

/* Pill list */
.pills {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 24px;
}
.pill {
  padding: 8px 16px;
  border: 1px solid var(--border-strong);
  border-radius: 100px;
  font-size: 13px;
  color: var(--fg-muted);
  background: var(--bg-card);
  transition: all 0.25s;
}
.pill:hover {
  color: var(--fg);
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* Pros/Cons */
.dual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 48px;
}
.panel {
  border-radius: 24px;
  padding: 40px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: transform 0.4s, box-shadow 0.4s;
}
.panel:hover { transform: translateY(-4px); }
.panel.good { border-color: rgba(48,209,88,0.25); }
.panel.good:hover { box-shadow: 0 30px 60px -30px rgba(48,209,88,0.3); }
.panel.bad { border-color: rgba(255,69,58,0.25); }
.panel.bad:hover { box-shadow: 0 30px 60px -30px rgba(255,69,58,0.3); }
.panel .tag {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.panel.good .tag { background: rgba(48,209,88,0.12); color: #30d158; }
.panel.bad .tag { background: rgba(255,69,58,0.12); color: #ff453a; }
.panel ul { list-style: none; margin-top: 16px; }
.panel ul li {
  padding: 16px 0;
  border-top: 1px solid var(--border);
  font-size: 15px;
  line-height: 1.55;
  color: var(--fg-muted);
}
.panel ul li:first-child { border-top: none; }
.panel ul li strong { color: var(--fg); font-weight: 600; display: block; margin-bottom: 4px; font-size: 16px;}

/* Principle blocks (big numbered items) */
.principles {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 60px;
}
.principle {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 40px;
  padding: 48px 40px;
  border-radius: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all 0.4s cubic-bezier(.2,.8,.2,1);
  position: relative;
  overflow: hidden;
}
.principle::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 50%, rgba(10,132,255,0.12), transparent 60%);
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
}
.principle:hover {
  transform: translateY(-4px);
  border-color: rgba(10,132,255,0.35);
}
.principle:hover::after { opacity: 1; }
.principle-num {
  font-size: 72px;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, #0a84ff, #bf5af2);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.04em;
}
.principle h3 { font-size: 26px; margin-bottom: 12px;}
.principle p { font-size: 16px; line-height: 1.6; color: var(--fg-muted); }

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 60px 0 48px;
  text-align: center;
  color: var(--fg-muted);
  font-size: 13px;
  background: var(--bg-soft);
}
footer .brand-line { font-size: 15px; margin-bottom: 10px; }
footer a.channel {
  background: linear-gradient(135deg, #ff3b30, #ff9500);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 600;
}
footer .links { margin-top: 16px; display: flex; gap: 20px; justify-content: center; }
footer .links a { color: var(--fg-dim); font-size: 12px; transition: color 0.2s; }
footer .links a:hover { color: var(--fg); }

/* Fade-in on load */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  animation: fadeUp 0.9s cubic-bezier(.2,.8,.2,1) forwards;
}
.fade-in.d1 { animation-delay: 0.08s; }
.fade-in.d2 { animation-delay: 0.16s; }
.fade-in.d3 { animation-delay: 0.24s; }
.fade-in.d4 { animation-delay: 0.32s; }
.fade-in.d5 { animation-delay: 0.40s; }
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(32px); transition: opacity 0.8s cubic-bezier(.2,.8,.2,1), transform 0.8s cubic-bezier(.2,.8,.2,1); }
.reveal.in { opacity: 1; transform: translateY(0); }

/* Highlight box */
.highlight-box {
  margin-top: 60px;
  padding: 48px;
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(10,132,255,0.08), rgba(191,90,242,0.08));
  border: 1px solid var(--border-strong);
  text-align: center;
}
.highlight-box .big {
  font-size: 32px;
  line-height: 1.3;
  letter-spacing: -0.02em;
  font-weight: 600;
  max-width: 860px;
  margin: 0 auto;
  color: var(--fg);
}
.highlight-box .src {
  margin-top: 20px;
  font-size: 13px;
  color: var(--fg-dim);
  letter-spacing: 0.03em;
}

/* Activation matrix */
.matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 40px;
}
.mode {
  padding: 28px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  transition: all 0.35s cubic-bezier(.2,.8,.2,1);
  position: relative;
  overflow: hidden;
}
.mode::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s;
}
.mode:hover {
  transform: translateY(-6px);
  border-color: var(--border-strong);
  background: #141416;
}
.mode:hover::before { transform: scaleX(1); }
.mode .mode-name {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}
.mode code {
  display: inline-block;
  margin-top: 8px;
  font-size: 11px;
  color: #64d2ff;
  background: rgba(100,210,255,0.08);
  padding: 3px 8px;
  border-radius: 6px;
  font-family: "SF Mono", monospace;
}
.mode p { font-size: 13px; color: var(--fg-muted); line-height: 1.5; margin-top: 8px; }

/* Side nav for multi-page */
.page-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 100px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}
.page-nav a {
  display: block;
  padding: 20px 28px;
  border-radius: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all 0.3s;
  max-width: 48%;
}
.page-nav a:hover { border-color: var(--accent); transform: translateY(-2px); background: #141416; }
.page-nav .label { font-size: 12px; color: var(--fg-dim); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 6px; }
.page-nav .title { font-size: 17px; color: var(--fg); font-weight: 500; }
.page-nav .next { text-align: right; margin-left: auto; }

/* Bullet list in body */
.bullet-list {
  margin-top: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.bullet-list li {
  list-style: none;
  padding: 18px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  font-size: 14px;
  color: var(--fg-muted);
  transition: all 0.3s;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.bullet-list li:hover {
  border-color: var(--border-strong);
  transform: translateX(4px);
  color: var(--fg);
}
.bullet-list li .chk {
  color: var(--accent-3);
  flex-shrink: 0;
  font-weight: 700;
}
.bullet-list li strong { color: var(--fg); font-weight: 600; }

/* Number hero stats */
.big-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.big-stat {
  padding: 40px 32px;
  border-radius: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all 0.4s;
  text-align: center;
}
.big-stat:hover { transform: translateY(-6px); border-color: var(--border-strong); }
.big-stat-num {
  font-size: 64px;
  font-weight: 700;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, #ff375f, #ff9500);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 10px;
}
.big-stat-num.b { background: linear-gradient(135deg, #0a84ff, #bf5af2); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;}
.big-stat-num.c { background: linear-gradient(135deg, #30d158, #64d2ff); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;}
.big-stat-label { font-size: 14px; color: var(--fg-muted); line-height: 1.5; }

/* Chart bars (for token costs) */
.chart {
  margin-top: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 40px;
}
.chart-row {
  display: grid;
  grid-template-columns: 200px 1fr 100px;
  gap: 24px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.chart-row:last-child { border-bottom: none; }
.chart-row .cr-name { font-size: 14px; color: var(--fg); font-weight: 500; }
.chart-row .cr-bar {
  height: 12px;
  background: rgba(255,255,255,0.04);
  border-radius: 6px;
  overflow: hidden;
}
.chart-row .cr-fill {
  height: 100%;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 1s cubic-bezier(.2,.8,.2,1);
}
.chart-row .cr-val { font-size: 13px; color: var(--fg-muted); text-align: right; font-family: "SF Mono", monospace; }
.chart-row.warn .cr-fill { background: linear-gradient(90deg, #ff9f0a, #ff375f); }