/* ─── Tokens (from DESIGN.md) ─────────────────────────────── */
:root {
  /* Brand */
  --primary: #cc785c;
  --primary-active: #a9583e;
  --primary-soft: #e8a55a;
  --accent-teal: #5db8a6;
  --accent-amber: #e8a55a;
  --success: #5db872;
  --danger: #c64545;

  /* Surfaces */
  --canvas: #faf9f5;
  --surface-soft: #f5f0e8;
  --surface-card: #efe9de;
  --surface-cream-strong: #e8e0d2;
  --surface-dark: #181715;
  --surface-dark-elevated: #252320;
  --surface-dark-soft: #1f1e1b;
  --hairline: #e6dfd8;
  --hairline-soft: #ebe6df;
  --hairline-dark: #2c2a26;

  /* Text */
  --ink: #141413;
  --body: #3d3d3a;
  --body-strong: #252523;
  --muted: #6c6a64;
  --muted-soft: #8e8b82;
  --on-primary: #ffffff;
  --on-dark: #faf9f5;
  --on-dark-soft: #a09d96;

  /* Type */
  --serif: "Fraunces", "Cormorant Garamond", "EB Garamond", "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Radius */
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-pill: 9999px;

  /* Easing */
  --ease-out: cubic-bezier(0.2, 0.7, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ─── Reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  color: var(--body);
  background: var(--canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  /* warm grain — subtle SVG noise */
  background-image:
    radial-gradient(circle at 20% 10%, rgba(204,120,92,0.04), transparent 35%),
    radial-gradient(circle at 80% 75%, rgba(93,184,166,0.03), transparent 40%),
    url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.92' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.08 0 0 0 0 0.08 0 0 0 0 0.07 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-attachment: fixed, fixed, fixed;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--ink); text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; padding: 0; color: inherit; }
code, pre, kbd { font-family: var(--mono); }
::selection { background: rgba(204,120,92,0.25); color: var(--ink); }

/* ─── Layout ───────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 32px;
}
@media (max-width: 768px) {
  .container { padding-inline: 20px; }
}

/* ─── Type ─────────────────────────────────────────────────── */
.display-xl, .display-lg, .display-md, .display-sm {
  font-family: var(--serif);
  font-weight: 400;
  color: var(--ink);
  margin: 0;
}
.display-xl { font-size: clamp(40px, 5.4vw, 68px); line-height: 1.04; letter-spacing: -1.4px; }
.display-lg { font-size: clamp(34px, 4.2vw, 50px); line-height: 1.08; letter-spacing: -1px; }
.display-md { font-size: clamp(28px, 3.4vw, 38px); line-height: 1.14; letter-spacing: -0.5px; }
.display-sm { font-size: clamp(22px, 2.6vw, 28px); line-height: 1.2; letter-spacing: -0.3px; }
.title-md   { font-size: 18px; font-weight: 500; line-height: 1.4; color: var(--ink); margin: 0; }

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 18px;
}
.eyebrow-light { color: rgba(255,255,255,0.9); }
.on-dark { color: var(--on-dark); }
.lede {
  font-size: 18px;
  line-height: 1.6;
  color: var(--body);
  max-width: 56ch;
}
.lede.on-dark { color: var(--on-dark-soft); }
.lede strong { color: var(--ink); }
.lede.on-dark strong { color: var(--on-dark); }

.ink-coral { color: var(--ink); position: relative; }

/* brush-stroke under "quiet" */
.brush-word {
  position: relative;
  display: inline-block;
  white-space: nowrap;
}
.brush-word::after {
  content: "";
  position: absolute;
  left: -4%;
  right: -4%;
  bottom: 4%;
  height: 0.42em;
  background: linear-gradient(105deg, transparent 6%, rgba(204,120,92,0.85) 18%, rgba(204,120,92,0.5) 60%, transparent 96%);
  border-radius: 60% 40% 70% 30% / 50% 60% 40% 50%;
  z-index: -1;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 1.1s var(--ease-out) 0.5s;
}
.reveal.in-view .brush-word::after { transform: scaleX(1); }

code { font-family: var(--mono); font-size: 0.86em; background: var(--surface-card); padding: 1px 6px; border-radius: 4px; color: var(--body-strong); }
.on-dark code, .footer code { background: rgba(255,255,255,0.06); color: var(--on-dark); }
.serif-code { font-family: var(--mono); font-size: 0.78em; padding: 6px 14px; background: var(--surface-dark-elevated); border-radius: var(--r-md); color: var(--on-dark); display: inline-block; }

/* ─── Scroll progress bar ─────────────────────────────────── */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--accent-amber));
  z-index: 100;
  transition: width 0.08s linear;
}

/* ─── Floating spike-marks ────────────────────────────────── */
.floaters {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.floater {
  position: absolute;
  fill: var(--primary);
  opacity: 0.08;
  animation: float 22s ease-in-out infinite;
}
.floater.f1 { top: 12%; left: 6%; width: 28px; animation-duration: 26s; }
.floater.f2 { top: 26%; right: 8%; width: 18px; opacity: 0.06; animation-duration: 32s; animation-delay: -8s; }
.floater.f3 { top: 62%; left: 14%; width: 22px; opacity: 0.05; animation-duration: 28s; animation-delay: -14s; }
.floater.f4 { top: 80%; right: 18%; width: 36px; opacity: 0.04; animation-duration: 36s; animation-delay: -20s; }
.floater.f5 { top: 44%; left: 50%; width: 14px; opacity: 0.05; animation-duration: 30s; animation-delay: -4s; }
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0); }
  25%      { transform: translateY(-14px) rotate(45deg); }
  50%      { transform: translateY(8px)  rotate(90deg); }
  75%      { transform: translateY(-6px) rotate(135deg); }
}

/* ─── Top nav ──────────────────────────────────────────────── */
.topnav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250,249,245,0.72);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.topnav.scrolled {
  border-bottom-color: var(--hairline);
  background: rgba(250,249,245,0.92);
}
.topnav-inner {
  height: 64px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-weight: 600;
}
.brand-mark { width: 18px; height: 18px; fill: var(--ink); }
.brand-on-dark .brand-mark { fill: var(--on-dark); }
.brand-on-dark { color: var(--on-dark); }
.brand-word { font-family: var(--sans); font-weight: 600; font-size: 17px; letter-spacing: -0.2px; }
.brand-tag {
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  padding-left: 8px;
  margin-left: 4px;
  border-left: 1px solid var(--hairline);
}
@media (max-width: 720px) { .brand-tag { display: none; } }

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}
.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--body);
  transition: color 0.2s var(--ease-out);
}
.nav-links a:hover { color: var(--primary); }
@media (max-width: 880px) { .nav-links { display: none; } }

.nav-right {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: auto;
}
@media (min-width: 881px) { .nav-right { margin-left: 0; } }

.version-chip {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  padding: 3px 8px;
  background: var(--surface-card);
  border-radius: var(--r-pill);
  color: var(--ink);
}

/* ─── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 44px;
  padding: 0 20px;
  border-radius: var(--r-md);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  font-family: var(--sans);
  transition: transform 0.18s var(--ease-out), background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
  white-space: nowrap;
}
.btn-sm { height: 36px; padding: 0 14px; font-size: 13px; }
.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
  box-shadow: 0 1px 0 rgba(20,20,19,0.06), 0 8px 24px -10px rgba(204,120,92,0.4);
}
.btn-primary:hover { background: var(--primary-active); transform: translateY(-1px); box-shadow: 0 1px 0 rgba(20,20,19,0.06), 0 14px 28px -10px rgba(204,120,92,0.55); }
.btn-primary:active { transform: translateY(0); }
.btn-primary .btn-prompt { opacity: 0.6; margin-right: 6px; }
.btn-primary .btn-cmd { font-family: var(--mono); font-size: 13px; font-weight: 500; }
.btn-primary .btn-label { display: inline-flex; align-items: center; }
.btn-primary .btn-icon { opacity: 0.75; display: inline-flex; }
.btn-primary.copied { background: var(--success); }
.btn-secondary {
  background: var(--canvas);
  color: var(--ink);
  border: 1px solid var(--hairline);
}
.btn-secondary:hover { border-color: var(--ink); transform: translateY(-1px); }
.btn-secondary .arrow { transition: transform 0.2s var(--ease-out); }
.btn-secondary:hover .arrow { transform: translateX(3px); }

/* ─── Hero ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  padding: clamp(64px, 8vw, 96px) 0 clamp(72px, 9vw, 120px);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--r-pill);
  background: var(--surface-card);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--body-strong);
  margin-bottom: 28px;
}
.kicker-mark { width: 12px; height: 12px; fill: var(--primary); animation: spin-mark 11s linear infinite; }
@keyframes spin-mark { to { transform: rotate(360deg); } }

.hero-copy h1 { margin-bottom: 24px; }
.hero-copy .lede { margin-bottom: 32px; max-width: 52ch; }
.hero-copy .lede strong { color: var(--ink); font-weight: 600; }

.cta-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-bottom: 28px; }

.hero-meta {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  font-size: 13px;
  color: var(--muted);
}
.hero-meta li { display: inline-flex; align-items: center; gap: 8px; }
.dot { width: 7px; height: 7px; border-radius: 50%; display: inline-block; }
.dot-success { background: var(--success); box-shadow: 0 0 0 3px rgba(93,184,114,0.15); }
.dot-amber   { background: var(--accent-amber); box-shadow: 0 0 0 3px rgba(232,165,90,0.15); }
.dot-coral   { background: var(--primary); box-shadow: 0 0 0 3px rgba(204,120,92,0.15); }
.dot-teal    { background: var(--accent-teal); box-shadow: 0 0 0 3px rgba(93,184,166,0.15); }

/* Hero mockup */
.hero-mockup {
  position: relative;
  perspective: 1200px;
}
.mockup-glow {
  position: absolute;
  inset: 12% -8% 12% -8%;
  background: radial-gradient(ellipse at center, rgba(204,120,92,0.18), transparent 65%);
  filter: blur(40px);
  z-index: -1;
}
.hero-mockup .window {
  transform: rotateX(2deg) rotateY(-4deg);
  transition: transform 0.7s var(--ease-out);
}
.hero-mockup:hover .window { transform: rotateX(0) rotateY(0); }

/* ─── Window chrome ────────────────────────────────────────── */
.window {
  background: var(--surface-dark);
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow:
    0 1px 0 rgba(255,255,255,0.04) inset,
    0 24px 60px -20px rgba(20,20,19,0.45),
    0 60px 90px -40px rgba(20,20,19,0.25);
  border: 1px solid var(--hairline-dark);
  color: var(--on-dark);
}
.window-chrome {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 14px;
  background: var(--surface-dark-elevated);
  border-bottom: 1px solid var(--hairline-dark);
}
.dot-mac { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.dot-mac.r { background: #ff5f57; }
.dot-mac.y { background: #febc2e; }
.dot-mac.g { background: #28c840; }
.window-title {
  margin-left: 16px;
  font-size: 12px;
  color: var(--on-dark-soft);
  font-family: var(--mono);
  letter-spacing: 0;
  flex: 1;
  text-align: center;
}
.window-spinner {
  font-family: var(--mono);
  color: var(--primary);
  font-size: 14px;
  width: 16px;
  text-align: center;
}
.window-body {
  background: var(--surface-dark);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
}
.window-body.code {
  padding: 22px 22px 26px;
  white-space: pre;
  overflow-x: auto;
  color: var(--on-dark);
}

/* ─── TUI mockup ───────────────────────────────────────────── */
.tui { color: var(--on-dark); padding: 14px 0 0; }
.tui-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px 12px;
  border-bottom: 1px solid var(--hairline-dark);
  font-family: var(--mono);
  font-size: 13px;
}
.tui-brand { display: inline-flex; align-items: center; gap: 6px; color: var(--primary); }
.tui-mark { display: inline-block; width: 14px; text-align: center; font-size: 14px; }
.tui-word { color: var(--primary); font-weight: 500; }
.tui-sep { color: var(--muted-soft); }
.tui-project { color: var(--on-dark); }
.tui-flex { flex: 1; }
.tui-kbd {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--surface-dark-elevated);
  border: 1px solid var(--hairline-dark);
  font-size: 11px;
  color: var(--on-dark);
}
.tui-kbdlbl { font-size: 11px; color: var(--on-dark-soft); margin-left: 4px; margin-right: 4px; }
.tui-status { font-size: 12px; color: var(--on-dark-soft); }

.tui-panes {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  min-height: 280px;
}
.tui-panes-big { grid-template-columns: 1fr 1.6fr; min-height: 340px; }
.tui-pane { padding: 14px 18px 10px; border-right: 1px solid var(--hairline-dark); }
.tui-pane:last-child { border-right: 0; }
.tui-pane-title { color: var(--primary); font-size: 12px; letter-spacing: 1.4px; text-transform: uppercase; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.tui-count { background: var(--surface-dark-elevated); padding: 1px 6px; border-radius: var(--r-pill); font-size: 11px; color: var(--on-dark-soft); letter-spacing: 0; text-transform: none; }
.tui-list { list-style: none; margin: 0; padding: 0; }
.tui-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 6px 10px;
  margin: 2px 0;
  border-radius: var(--r-sm);
  border-left: 2px solid transparent;
  transition: background 0.18s ease, border-color 0.18s ease;
}
.tui-list li.active {
  background: rgba(204,120,92,0.12);
  border-left-color: var(--primary);
}
.tui-list .t-name { color: var(--on-dark); font-size: 13px; }
.tui-list .t-meta { color: var(--on-dark-soft); font-size: 11px; }
.tui-list li.active .t-name { color: var(--on-dark); }

.tui-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 10px 18px;
  border-top: 1px solid var(--hairline-dark);
  background: var(--surface-dark-elevated);
  font-size: 11px;
  color: var(--on-dark-soft);
}
.tui-footer span { display: inline-flex; align-items: center; gap: 6px; }

.tui-lg { padding-top: 16px; }

/* ─── Stats strip ─────────────────────────────────────────── */
.stats-strip {
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  background: var(--surface-soft);
  padding: 36px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
@media (max-width: 720px) { .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; } }
.stat { text-align: center; }
.stat-num {
  font-family: var(--serif);
  font-size: clamp(36px, 4vw, 52px);
  font-weight: 400;
  line-height: 1;
  color: var(--ink);
  letter-spacing: -1.5px;
}
.stat-num .unit { color: var(--primary); }
.stat-label { font-size: 13px; color: var(--muted); margin-top: 10px; letter-spacing: 0.4px; }

/* ─── Section rhythm ──────────────────────────────────────── */
section { position: relative; }
.problem, .tui-showcase, .commands {
  background: var(--surface-dark);
  color: var(--on-dark);
  padding: clamp(72px, 9vw, 104px) 0;
}
.features, .architecture {
  background: var(--canvas);
  padding: clamp(72px, 9vw, 104px) 0;
}
.band-head { max-width: 760px; margin-bottom: 56px; }

/* ─── Problem ─────────────────────────────────────────────── */
.problem .band-head h2 { color: var(--on-dark); }
.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
@media (max-width: 880px) { .problem-grid { grid-template-columns: 1fr; } }

.terminal {
  background: var(--surface-dark-soft);
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--hairline-dark);
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
}
.terminal:hover { transform: translateY(-4px); box-shadow: 0 20px 40px -20px rgba(0,0,0,0.4); }
.terminal-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--hairline-dark);
}
.terminal-tag {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  background: rgba(198,69,69,0.18);
  color: #f1a3a3;
}
.tag-coral { background: rgba(204,120,92,0.2); color: #f5b59f; }
.terminal-title { font-family: var(--mono); font-size: 12px; color: var(--on-dark-soft); }
.terminal-body {
  margin: 0;
  padding: 18px 20px;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--on-dark-soft);
  overflow-x: auto;
  white-space: pre;
}
.t-dim { color: var(--on-dark-soft); }
.t-warn { color: #d8a877; opacity: 0.85; }
.t-h { color: var(--primary); }
.t-row { color: var(--on-dark); display: block; }
.t-coral { color: var(--primary); font-weight: 500; }
.t-ok { color: var(--accent-teal); }

/* ─── Features grid ───────────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 980px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .features-grid { grid-template-columns: 1fr; } }

.feature-card {
  background: var(--surface-card);
  border-radius: var(--r-lg);
  padding: 32px;
  transition: transform 0.45s var(--ease-out), box-shadow 0.45s var(--ease-out), background 0.3s ease;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.feature-card .chip {
  margin-top: auto;
  align-self: flex-start;
}
.feature-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: var(--r-lg);
  padding: 1px;
  background: linear-gradient(135deg, rgba(204,120,92,0.4), transparent 60%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 48px -24px rgba(20,20,19,0.18);
  background: var(--surface-cream-strong);
}
.feature-card:hover::before { opacity: 1; }
.feature-glyph {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--r-md);
  background: var(--canvas);
  color: var(--primary);
  font-size: 22px;
  font-family: var(--mono);
  margin-bottom: 22px;
  transition: transform 0.4s var(--ease-spring), color 0.3s ease;
}
.feature-card:hover .feature-glyph { transform: rotate(45deg) scale(1.06); }
.feature-card h3 { margin-bottom: 10px; }
.feature-card p { font-size: 14.5px; line-height: 1.6; color: var(--body); margin: 0 0 18px; }
.feature-card p code { font-size: 0.85em; }
.chip {
  display: inline-block;
  padding: 4px 10px;
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--r-sm);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--body-strong);
}

/* ─── TUI Showcase (dark) ─────────────────────────────────── */
.tui-showcase .kbd-inline {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  padding: 1px 7px;
  border-radius: 4px;
  background: var(--surface-dark-elevated);
  border: 1px solid var(--hairline-dark);
  color: var(--on-dark);
  margin: 0 1px;
}
.tui-big {
  max-width: 1080px;
  margin: 0 auto;
}
.window-lg { box-shadow:
  0 1px 0 rgba(255,255,255,0.05) inset,
  0 40px 80px -30px rgba(0,0,0,0.55),
  0 80px 140px -60px rgba(0,0,0,0.45);
}

/* ─── Architecture ────────────────────────────────────────── */
.arch-diagram {
  max-width: 880px;
  margin: 0 auto;
  background: var(--surface-soft);
  border-radius: var(--r-xl);
  padding: 40px 32px;
  border: 1px solid var(--hairline);
}
.arch-svg { width: 100%; height: auto; color: var(--muted); }
.arch-node ellipse,
.arch-node rect {
  fill: var(--canvas);
  stroke: var(--ink);
  stroke-width: 1.4;
}
.arch-node-card rect { fill: var(--canvas); }
.arch-node-coral rect { fill: var(--primary); stroke: var(--primary-active); }
.arch-node-coral .arch-title,
.arch-node-coral .arch-sub { fill: #fff; }
.arch-title {
  font-family: var(--serif);
  font-size: 22px;
  fill: var(--ink);
  text-anchor: middle;
  letter-spacing: -0.4px;
}
.arch-sub {
  font-family: var(--sans);
  font-size: 12px;
  fill: var(--body);
  text-anchor: middle;
}
.arch-mono {
  font-family: var(--mono);
  font-size: 11px;
  fill: var(--muted);
  text-anchor: middle;
}
.arch-label {
  font-family: var(--sans);
  font-size: 13px;
  fill: var(--body);
  text-anchor: middle;
}
.arch-arrow {
  fill: none;
  stroke: var(--muted);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-dasharray: 360;
  stroke-dashoffset: 360;
}
.arch-arrow-coral { stroke: var(--primary); }
.reveal.in-view .arch-arrow {
  animation: dash 1.2s var(--ease-out) forwards;
}
.reveal.in-view .arch-arrow:nth-of-type(2) { animation-delay: 0.15s; }
.reveal.in-view .arch-arrow:nth-of-type(3) { animation-delay: 0.3s; }
.reveal.in-view .arch-arrow:nth-of-type(4) { animation-delay: 0.45s; }
.reveal.in-view .arch-arrow:nth-of-type(5) { animation-delay: 0.6s; }
@keyframes dash { to { stroke-dashoffset: 0; } }

.arch-note {
  margin: 40px auto 0;
  max-width: 720px;
  text-align: center;
  font-size: 14.5px;
  color: var(--body);
  line-height: 1.7;
}
.arch-note strong { color: var(--ink); }

/* ─── Commands (dark + tabs) ──────────────────────────────── */
.cmd-tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 4px;
  background: var(--surface-dark-elevated);
  border-radius: var(--r-md);
  border: 1px solid var(--hairline-dark);
  margin-bottom: 20px;
}
.cmd-tab {
  font-family: var(--mono);
  font-size: 13px;
  padding: 8px 14px;
  color: var(--on-dark-soft);
  border-radius: var(--r-sm);
  transition: background 0.2s ease, color 0.2s ease;
}
.cmd-tab:hover { color: var(--on-dark); }
.cmd-tab.active { background: var(--primary); color: var(--on-primary); }

.cmd-window { max-width: 980px; }
.window-dark { background: var(--surface-dark-soft); }
.window-body.code .prompt { color: var(--primary); margin-right: 8px; }
.window-body.code .cmd { color: var(--on-dark); }
.window-body.code .c-h { color: var(--primary); display: block; margin-bottom: 6px; }
.window-body.code .c-r { color: var(--on-dark); display: block; }
.window-body.code .c-acc { color: var(--primary); }
.window-body.code .c-ok { color: var(--accent-teal); display: block; margin-top: 10px; }
.window-body.code .c-dim { color: var(--on-dark-soft); }
.window-body.code .c-amber { color: var(--accent-amber); }

/* typewriter caret (when JS injects cursor) */
.tw-caret {
  display: inline-block;
  width: 8px;
  height: 1em;
  background: var(--primary);
  vertical-align: -2px;
  margin-left: 2px;
  animation: caret 1s steps(1) infinite;
}
@keyframes caret { 50% { opacity: 0; } }

/* ─── Coral CTA band ──────────────────────────────────────── */
.cta-band {
  background: var(--canvas);
  padding: clamp(56px, 7vw, 96px) 0;
}
.cta-card {
  background: var(--primary);
  color: var(--on-primary);
  border-radius: var(--r-xl);
  padding: clamp(40px, 5vw, 64px);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 18% 22%, rgba(255,255,255,0.18), transparent 35%),
    radial-gradient(circle at 88% 78%, rgba(0,0,0,0.18), transparent 40%);
  pointer-events: none;
}
.cta-card > * { position: relative; z-index: 1; }
.cta-card h2 { color: #fff; margin-bottom: 16px; }
.cta-card h2 code { background: rgba(0,0,0,0.18); color: #fff; padding: 2px 10px; border-radius: var(--r-md); font-size: 0.78em; }
.cta-card p { color: rgba(255,255,255,0.92); margin: 0; font-size: 15px; }
.cta-card a { color: #fff; text-decoration: underline; text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
.cta-card code { background: rgba(255,255,255,0.16); color: #fff; }

@media (max-width: 880px) { .cta-card { grid-template-columns: 1fr; } }

.cta-codes { display: flex; flex-direction: column; gap: 12px; }
.copy-block {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--surface-dark);
  color: var(--on-dark);
  border-radius: var(--r-md);
  font-family: var(--mono);
  font-size: 14px;
  text-align: left;
  transition: transform 0.2s var(--ease-out), background 0.2s ease, color 0.2s ease;
  position: relative;
}
.copy-block:hover { transform: translateY(-2px); background: #000; }
.copy-block.copied { background: var(--success); color: #fff; }
.copy-block-ghost {
  background: rgba(0,0,0,0.18);
  color: rgba(255,255,255,0.95);
}
.copy-block-ghost:hover { background: rgba(0,0,0,0.32); }
.copy-prompt { color: var(--primary); opacity: 0.95; flex-shrink: 0; }
.copy-block-ghost .copy-prompt { color: #fff; opacity: 0.8; }
.copy-cmd { flex: 1; }
.copy-icon { display: inline-flex; opacity: 0.6; transition: opacity 0.2s ease; }
.copy-block:hover .copy-icon { opacity: 1; }

/* ─── Footer ──────────────────────────────────────────────── */
.footer {
  background: var(--surface-dark);
  color: var(--on-dark-soft);
  padding: 64px 0 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
@media (max-width: 880px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand p { margin: 14px 0 0; font-size: 14px; max-width: 38ch; line-height: 1.6; }
.footer-tiny { font-size: 12px; color: var(--muted-soft); }
.footer-head { color: var(--on-dark); font-size: 13px; font-weight: 500; margin-bottom: 14px; letter-spacing: 0.4px; }
.footer-col a { display: block; color: var(--on-dark-soft); font-size: 14px; padding: 4px 0; transition: color 0.2s ease; }
.footer-col a:hover { color: var(--on-dark); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding-top: 28px;
  border-top: 1px solid var(--hairline-dark);
  font-size: 13px;
}
@media (max-width: 560px) { .footer-bottom { flex-direction: column; align-items: flex-start; } }

/* ─── Reveal-on-scroll ────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
  will-change: opacity, transform;
}
.reveal.in-view {
  opacity: 1;
  transform: none;
}

/* ─── Toast ───────────────────────────────────────────────── */
.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%) translateY(20px);
  padding: 12px 20px;
  background: var(--ink);
  color: var(--on-dark);
  border-radius: var(--r-md);
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 14px 40px -14px rgba(0,0,0,0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s var(--ease-out);
  z-index: 200;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ─── Reduced motion ──────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }
  .reveal { opacity: 1; transform: none; }
  .floater { display: none; }
}