/* ContextHub Landing — Signal-green / Geist refinement
   Design system: signal-green accent, violet for AI, Geist + JetBrains Mono + Instrument Serif
   ─────────────────────────────────────────── */

/* ── Fonts ── */
@import url("https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&family=Instrument+Serif:ital@0;1&display=swap");

/* ── Design Tokens ── */
:root {
  /* Brand */
  --brand-signal: #B8FF5C;
  --brand-signal-ink: #0D1A00;
  --brand-signal-soft: rgba(184, 255, 92, 0.14);
  --brand-signal-edge: rgba(184, 255, 92, 0.32);
  --brand-signal-glow: rgba(184, 255, 92, 0.22);

  --brand-violet: #A78BFA;
  --brand-violet-soft: rgba(167, 139, 250, 0.14);
  --brand-violet-edge: rgba(167, 139, 250, 0.32);

  /* Neutral ramp (12 stops) */
  --ink-0:  #07080A;
  --ink-1:  #0B0D10;
  --ink-2:  #101317;
  --ink-3:  #161A1F;
  --ink-4:  #1D222A;
  --ink-5:  #2A3039;
  --ink-6:  #3A4250;
  --ink-7:  #5A6272;
  --ink-8:  #9098A8;
  --ink-9:  #A8B0BF;
  --ink-10: #D4D7DE;
  --ink-11: #F0F1F4;
  --ink-12: #FFFFFF;

  /* Semantic (tempered) */
  --success:      #7DE892;
  --success-soft: rgba(125, 232, 146, 0.14);
  --warning:      #FFB84D;
  --warning-soft: rgba(255, 184, 77, 0.14);
  --danger:       #FF6B7A;
  --danger-soft:  rgba(255, 107, 122, 0.14);
  --info:         #6BB8FF;
  --info-soft:    rgba(107, 184, 255, 0.14);

  /* Roles */
  --bg:          var(--ink-1);
  --bg-raised:   var(--ink-2);
  --bg-higher:   var(--ink-3);
  --bg-hover:    var(--ink-4);
  --bg-overlay:  rgba(7, 8, 10, 0.72);

  --fg:          var(--ink-11);
  --fg-muted:    var(--ink-9);
  --fg-subtle:   var(--ink-8);
  --fg-disabled: var(--ink-7);
  --fg-on-accent: var(--brand-signal-ink);

  --border:         var(--ink-5);
  --border-strong:  var(--ink-6);
  --border-subtle:  rgba(255, 255, 255, 0.06);

  --accent:      var(--brand-signal);
  --accent-fg:   var(--brand-signal-ink);
  --accent-soft: var(--brand-signal-soft);
  --accent-edge: var(--brand-signal-edge);
  --accent-glow: var(--brand-signal-glow);

  --ai:       var(--brand-violet);
  --ai-soft:  var(--brand-violet-soft);
  --ai-edge:  var(--brand-violet-edge);

  /* Typography */
  --font-sans:  "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono:  "JetBrains Mono", ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace;
  --font-serif: "Instrument Serif", "Iowan Old Style", Georgia, serif;

  /* Type scale — tight, dense */
  --fs-xs:   11px;   --lh-xs: 1.45;
  --fs-sm:   13px;   --lh-sm: 1.5;
  --fs-base: 15px;   --lh-base: 1.6;
  --fs-md:   17px;   --lh-md: 1.55;
  --fs-lg:   20px;   --lh-lg: 1.4;
  --fs-xl:   24px;   --lh-xl: 1.3;
  --fs-2xl:  32px;   --lh-2xl: 1.2;
  --fs-3xl:  44px;   --lh-3xl: 1.1;
  --fs-4xl:  64px;   --lh-4xl: 1.0;
  --fs-5xl:  88px;   --lh-5xl: 0.95;

  --fw-regular:  400;
  --fw-medium:   500;
  --fw-semibold: 600;
  --fw-bold:     700;

  --tr-tight:  -0.03em;
  --tr-snug:   -0.015em;
  --tr-normal:  0;
  --tr-mono:    0.01em;
  --tr-label:   0.08em;

  /* Spacing (8px grid) */
  --sp-1:  4px;
  --sp-2:  8px;
  --sp-3:  12px;
  --sp-4:  16px;
  --sp-5:  20px;
  --sp-6:  24px;
  --sp-7:  32px;
  --sp-8:  40px;
  --sp-9:  48px;
  --sp-10: 64px;
  --sp-11: 80px;
  --sp-12: 96px;

  /* Radii — restrained */
  --r-xs:  2px;
  --r-sm:  4px;
  --r-md:  8px;
  --r-lg:  12px;
  --r-xl:  16px;
  --r-pill: 999px;

  /* Shadows — minimal; prefer borders */
  --shadow-xs: 0 1px 0 rgba(0,0,0,0.4);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3), 0 0 0 1px rgba(255,255,255,0.02);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4), 0 0 0 1px rgba(255,255,255,0.02);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.03);

  /* Motion */
  --ease-out:    cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast: 120ms;
  --dur-base: 200ms;
  --dur-slow: 400ms;

  /* Layout */
  --container: 1200px;
  --container-narrow: 720px;
  --nav-h: 56px;
}

/* ── Reset ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  font-weight: var(--fw-regular);
  color: var(--fg);
  background: var(--bg);
  overflow-x: hidden;
  width: 100%;
  font-feature-settings: "ss01", "cv11";
}
body.modal-open { overflow: hidden; }

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: var(--font-sans); }

::selection { background: var(--accent); color: var(--accent-fg); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--r-xs);
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--sp-3);
  padding: 8px 14px;
  background: var(--accent);
  color: var(--accent-fg);
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  border-radius: var(--r-md);
  z-index: 200;
  transition: top var(--dur-base) var(--ease-out);
}
.skip-link:focus { top: var(--sp-3); }

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-feature-settings: "ss02", "zero";
  letter-spacing: var(--tr-mono);
}

/* ── Navigation ── */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background var(--dur-base), border-color var(--dur-base);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: var(--bg-overlay);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom-color: var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.02em;
  color: var(--fg);
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.02em;
  color: var(--fg);
}
.logo-mark::before { content: "["; color: var(--accent); }
.logo-mark::after  { content: "]"; color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-7);
}

.nav-links a {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--fg-muted);
  transition: color var(--dur-base);
}
.nav-links a:hover { color: var(--fg); }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 8px 14px;
  border-radius: var(--r-md);
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  border: none;
  cursor: pointer;
  transition: all var(--dur-base) var(--ease-out);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
}
.btn-primary:hover {
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.btn-ghost {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--border-strong);
  background: var(--bg-hover);
}

.btn-sm { padding: 8px 14px; font-size: var(--fs-xs); min-height: 36px; }
.btn-lg { padding: 11px 20px; font-size: 14px; min-height: 44px; }
.btn-full { width: 100%; }

.btn .arrow { transition: transform var(--dur-base); }
.btn:hover .arrow { transform: translateX(2px); }

/* ── Auth modal ── */
.auth-modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: grid;
  place-items: center;
  padding: var(--sp-6);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-out);
}
.auth-modal[hidden] { display: none; }
.auth-modal.open {
  opacity: 1;
  pointer-events: auto;
}
.auth-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(7, 8, 10, 0.76);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
}
.auth-card {
  position: relative;
  width: min(100%, 420px);
  max-height: calc(100vh - var(--sp-8));
  overflow-y: auto;
  padding: var(--sp-8);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--bg-raised);
  box-shadow: var(--shadow-lg);
  transform: translateY(8px) scale(0.98);
  transition: transform var(--dur-base) var(--ease-out);
}
.auth-modal.open .auth-card { transform: none; }
.auth-close {
  position: absolute;
  top: var(--sp-4);
  right: var(--sp-4);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: transparent;
  color: var(--fg-muted);
  cursor: pointer;
  transition: color var(--dur-base), border-color var(--dur-base), background var(--dur-base);
}
.auth-close:hover {
  color: var(--fg);
  border-color: var(--border-strong);
  background: var(--bg-hover);
}
.auth-close svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}
.auth-brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: var(--sp-5);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--bg);
}
.auth-card h2 {
  max-width: 300px;
  font-size: var(--fs-xl);
  line-height: var(--lh-xl);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tr-snug);
  color: var(--fg);
}
.auth-card p {
  margin-top: var(--sp-2);
  color: var(--fg-muted);
  font-size: var(--fs-sm);
  line-height: var(--lh-sm);
}
.auth-providers {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  margin-top: var(--sp-7);
}
.provider-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  min-height: 46px;
  width: 100%;
  padding: 10px var(--sp-4);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--bg);
  color: var(--fg);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: border-color var(--dur-base), background var(--dur-base);
}
.provider-btn:hover {
  border-color: var(--border-strong);
  background: var(--bg-hover);
}
.provider-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.provider-icon-apple { fill: currentColor; }
.auth-fineprint {
  margin-top: var(--sp-5) !important;
  color: var(--fg-subtle) !important;
  text-align: center;
  font-size: var(--fs-xs) !important;
}

/* ── Mobile ── */
.mobile-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}
.mobile-toggle span {
  display: block; width: 20px; height: 2px;
  background: var(--fg);
  border-radius: 2px;
  transition: transform var(--dur-base), opacity var(--dur-base);
}
.mobile-toggle.active span:first-child { transform: rotate(45deg) translate(2.5px, 2.5px); }
.mobile-toggle.active span:last-child  { transform: rotate(-45deg) translate(2.5px, -2.5px); }

.mobile-menu {
  display: none;
  position: fixed; inset: 0;
  background: rgba(7, 8, 10, 0.98);
  backdrop-filter: blur(20px);
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-7);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.mobile-menu.open { opacity: 1; pointer-events: all; }
.mobile-menu a {
  font-size: var(--fs-lg);
  font-weight: var(--fw-medium);
  color: var(--fg-muted);
}

/* ── Hero ── */
.hero {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  padding: calc(var(--nav-h) + var(--sp-11)) var(--sp-6) var(--sp-12);
  text-align: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: var(--sp-9);
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 500px;
  background: radial-gradient(ellipse at center, var(--accent-soft) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 5px 12px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-edge);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: 0.06em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: var(--sp-7);
}
.hero-eyebrow span:first-child {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  flex-shrink: 0;
}

.hero h1 {
  font-family: var(--font-sans);
  font-size: clamp(44px, 6vw, 72px);
  font-weight: var(--fw-medium);
  letter-spacing: -0.04em;
  line-height: 1.02;
  max-width: 900px;
  margin: 0 auto;
}

.accent-text { color: var(--accent); }

.hero-sub {
  margin-top: var(--sp-6);
  font-size: var(--fs-md);
  line-height: 1.55;
  color: var(--fg-muted);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  margin-top: var(--sp-8);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Demo section layout ── */
.demo-section { text-align: left; }

/* Shared mockup frame */
.mock-frame {
  max-width: 960px;
  margin: 0 auto;
  aspect-ratio: 16 / 9;
  display: flex;
}
.mock-frame > * {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

/* ── Terminal ── */
.terminal {
  background: var(--ink-0);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  box-shadow: var(--shadow-md);
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}

/* Unified macOS traffic-light dots (used by hero terminal, CLI demo, web editor mock) */
.traffic-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.traffic-dot.red    { background: #ff5f57; }
.traffic-dot.yellow { background: #febc2e; }
.traffic-dot.green  { background: #28c840; }

.terminal-title {
  flex: 1;
  min-width: 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--fg-subtle);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.terminal-body {
  flex: 1;
  min-height: 0;
  padding: var(--sp-4) var(--sp-5);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  line-height: 1.7;
  overflow-y: auto;
  overflow-x: hidden;
  color: var(--fg);
  text-align: left;
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-behavior: smooth;
}
.terminal-body::-webkit-scrollbar { display: none; }

.term-line {
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 1.4em;
}

.term-prompt    { color: var(--accent); }
.term-prompt-q  { color: var(--warning); }
.term-ok        { color: var(--success); }
.term-dim       { color: var(--fg-subtle); }
.term-spin      { color: var(--accent); }
.term-bar       { color: var(--accent); }
.term-bar-empty { color: var(--fg-subtle); }
.term-pct       { color: var(--fg-muted); }
.term-pointer   { color: var(--accent); }
.term-option    { color: var(--fg-muted); }
.term-option-active {
  color: var(--fg);
  background: var(--accent-soft);
  border-radius: var(--r-xs);
  padding: 0 4px;
  margin: 0 -4px;
}

.term-cursor {
  display: inline-block;
  width: 0.55em;
  height: 1em;
  background: var(--accent);
  vertical-align: text-bottom;
  margin-left: 1px;
  border-radius: 1px;
  animation: term-blink 1.1s steps(2, end) infinite;
}

@keyframes term-blink {
  0%, 55% { opacity: 1; }
  60%, 100% { opacity: 0; }
}

@media (max-width: 768px) {
  .terminal-body { font-size: var(--fs-xs); padding: var(--sp-3); }
}

/* ── Web editor mockup ── */
.docapp {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  text-align: left;
  display: flex;
  flex-direction: column;
  height: 100%;
  box-shadow: var(--shadow-md);
}

.docapp-chrome {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
  flex-shrink: 0;
}

.phone-statusbar { display: none; }
.docapp-url {
  flex: 1;
  min-width: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 4px 12px;
  margin: 0 var(--sp-2);
  background: var(--bg-higher);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--fg-subtle);
}
.docapp-url svg {
  width: 11px; height: 11px;
  color: var(--success);
  flex-shrink: 0;
}
.docapp-url-text {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* title bar */
.docapp-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: 10px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.docapp-title {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  min-width: 0;
}
.docapp-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-sm);
  letter-spacing: -0.02em;
  color: var(--fg);
  flex-shrink: 0;
}
.docapp-logo::before { content: "["; color: var(--accent); }
.docapp-logo::after  { content: "]"; color: var(--accent); }
.docapp-title-text { min-width: 0; }
.docapp-docname {
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--fg);
  letter-spacing: -0.01em;
}
.docapp-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--fg-subtle);
  margin-top: 2px;
}
.docapp-saved {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--success);
}
.saved-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
}
.docapp-sep { color: var(--fg-subtle); }
.docapp-mention { color: var(--info); }

.docapp-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-shrink: 0;
}
.docapp-history {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  background: transparent;
  color: var(--fg-muted);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: all var(--dur-base) var(--ease-out);
}
.docapp-history:hover {
  color: var(--fg);
  border-color: var(--border-strong);
  background: var(--bg-hover);
}
.docapp-history svg { width: 12px; height: 12px; }
.docapp-share {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: var(--accent);
  color: var(--accent-fg);
  border: none;
  border-radius: var(--r-md);
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  cursor: pointer;
  transition: box-shadow var(--dur-base) var(--ease-out);
}
.docapp-share:hover { box-shadow: 0 0 0 3px var(--accent-soft); }
.docapp-share svg { width: 12px; height: 12px; }

/* toolbar */
.docapp-toolbar {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 6px var(--sp-4);
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.015);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  flex-shrink: 0;
}
.docapp-toolbar::-webkit-scrollbar { display: none; }
.tb-group { display: inline-flex; gap: 2px; }
.tb-divider {
  width: 1px; height: 20px;
  background: var(--border);
  margin: 0 6px;
}
.tb-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 8px;
  background: transparent;
  border: none;
  border-radius: var(--r-sm);
  color: var(--fg-muted);
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  cursor: pointer;
  transition: background var(--dur-base), color var(--dur-base);
}
.tb-btn:hover { background: var(--bg-hover); color: var(--fg); }
.tb-btn svg { width: 13px; height: 13px; }
.tb-icon { width: 28px; justify-content: center; padding: 5px; }
.tb-icon b, .tb-icon i, .tb-icon u { font-size: var(--fs-sm); }
.tb-label { font-size: var(--fs-xs); }
.tb-ai-group { margin-left: auto; }
.tb-ai {
  background: var(--ai-soft);
  color: var(--ai);
  font-weight: var(--fw-medium);
  border: 1px solid var(--ai-edge);
  padding: 4px 10px;
}
.tb-ai:hover { background: var(--ai-soft); color: var(--ai); border-color: var(--ai); }

/* document body */
.docapp-body {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  background: var(--bg);
  display: flex;
  gap: 0;
}

.docapp-tree {
  width: 168px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  background: rgba(255,255,255,0.015);
  padding: var(--sp-3) 10px;
  overflow: hidden;
}
.tree-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: var(--fw-medium);
  letter-spacing: var(--tr-label);
  text-transform: uppercase;
  color: var(--fg-subtle);
  padding: 0 6px 8px;
}
.tree-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.tree-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--fg-muted);
  cursor: pointer;
  transition: background var(--dur-base), color var(--dur-base);
}
.tree-item { pointer-events: none; }
.tree-item.active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: var(--fw-medium);
}
.tree-item.dim {
  color: var(--fg-subtle);
  font-style: italic;
}
.tree-icon {
  font-size: 10px;
  color: var(--fg-subtle);
  width: 10px;
  text-align: center;
}
.tree-item.active .tree-icon { color: var(--accent); }

.docapp-page {
  flex: 1;
  min-width: 0;
  margin: var(--sp-4);
  background: var(--bg-higher);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 18px 24px 20px;
  position: relative;
  font-size: var(--fs-sm);
  line-height: 1.6;
  overflow: hidden;
}

.doc-h1 {
  font-family: var(--font-sans);
  font-size: var(--fs-lg);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tr-snug);
  color: var(--fg);
  margin-bottom: 8px;
}
.doc-h2 {
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  color: var(--fg);
  margin-top: var(--sp-4);
  margin-bottom: 6px;
  letter-spacing: var(--tr-snug);
}
.doc-p {
  color: var(--fg-muted);
  line-height: 1.65;
  font-size: var(--fs-sm);
}

.doc-typing {
  color: var(--fg);
  background: var(--accent-soft);
  border-radius: 2px;
  padding: 0 2px;
  margin: 0 -2px;
}
.doc-caret {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--accent);
  vertical-align: text-bottom;
  margin-left: 1px;
  animation: term-blink 1.1s steps(2, end) infinite;
}

/* remote user cursor */
.doc-remote-cursor {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, top 0.5s var(--ease-out), left 0.5s var(--ease-out);
  z-index: 3;
}
.doc-remote-cursor.show { opacity: 1; }
.remote-caret {
  display: block;
  width: 2px;
  height: 1.1em;
  background: var(--info);
  animation: term-blink 1.1s steps(2, end) infinite;
}
.remote-label {
  position: absolute;
  top: -1.3em;
  left: -2px;
  padding: 2px 6px;
  background: var(--info);
  color: var(--ink-0);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: var(--fw-semibold);
  border-radius: var(--r-xs) var(--r-xs) var(--r-xs) 0;
  white-space: nowrap;
}

/* AI challenge callout */
.doc-ai-callout {
  margin-top: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--r-md);
  background: var(--ai-soft);
  border: 1px solid var(--ai-edge);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.4s, transform 0.4s;
}
.doc-ai-callout.show { opacity: 1; transform: none; }
.ai-callout-head {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: 6px;
  font-size: var(--fs-xs);
}
.ai-callout-icon {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--ai);
  color: var(--ink-0);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: var(--fw-bold);
}
.ai-callout-title {
  font-family: var(--font-mono);
  font-weight: var(--fw-medium);
  color: var(--ai);
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: var(--tr-label);
}
.ai-callout-time {
  margin-left: auto;
  color: var(--fg-subtle);
  font-family: var(--font-mono);
  font-size: 10px;
}
.ai-callout-body {
  font-size: var(--fs-sm);
  color: var(--fg);
  line-height: 1.55;
}
.ai-quote {
  background: var(--ai-soft);
  padding: 0 4px;
  border-radius: var(--r-xs);
  color: var(--ai);
  font-weight: var(--fw-medium);
}
.ai-callout-actions {
  display: flex;
  gap: var(--sp-2);
  margin-top: var(--sp-2);
}
.ai-btn {
  padding: 4px 10px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg-muted);
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: all var(--dur-base) var(--ease-out);
}
.ai-btn:hover { color: var(--fg); border-color: var(--border-strong); }
.ai-btn-primary {
  background: var(--ai);
  color: var(--ink-0);
  border-color: var(--ai);
}
.ai-btn-primary:hover { box-shadow: 0 0 0 3px var(--ai-soft); }

/* ── Mobile: web editor renders as a phone mockup ── */
@media (max-width: 768px) {
  /* CLI mock: drop 16:9 — let the terminal grow vertically */
  #mock-cli { aspect-ratio: 4 / 5; }

  /* Web editor mock: portrait phone form factor */
  #mock-web {
    aspect-ratio: 9 / 19;
    max-width: 300px;
    margin: 0 auto;
  }

  #mock-web .docapp {
    border-radius: 36px;
    border: 6px solid var(--ink-3);
    box-shadow:
      inset 0 0 0 1px var(--border),
      0 16px 48px rgba(0,0,0,0.55);
    overflow: hidden;
    position: relative;
  }

  /* Phone status bar */
  #mock-web .phone-statusbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 34px;
    padding: 0 16px;
    background: var(--bg-raised);
    color: var(--fg);
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: var(--fw-semibold);
    letter-spacing: -0.02em;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
  }
  #mock-web .ps-icons {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--fg);
  }
  #mock-web .ps-signal  { height: 10px; width: auto; }
  #mock-web .ps-wifi    { height: 11px; width: auto; }
  #mock-web .ps-battery { height: 10px; width: auto; }

  /* Dynamic island */
  #mock-web .docapp::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 78px;
    height: 20px;
    background: #000;
    border-radius: var(--r-pill);
    z-index: 5;
  }

  /* Browser chrome out — phone has no URL bar */
  #mock-web .docapp-chrome { display: none; }

  /* Compact app header */
  #mock-web .docapp-titlebar { padding: 8px 12px; gap: 8px; }
  #mock-web .docapp-history,
  #mock-web .docapp-meta { display: none; }
  #mock-web .docapp-docname { font-size: 12px; }
  #mock-web .docapp-logo { font-size: 11px; }
  #mock-web .docapp-share { padding: 4px 10px; font-size: 11px; }

  /* Compact toolbar — keep only B/I/U + Ask AI on phone */
  #mock-web .docapp-toolbar { padding: 4px 8px; overflow-x: auto; }
  #mock-web .docapp-toolbar .tb-btn { padding: 4px 5px; }
  #mock-web .docapp-toolbar .tb-btn .tb-label { display: none; }
  #mock-web .docapp-toolbar .tb-divider { margin: 0 4px; height: 16px; }
  #mock-web .tb-ai { padding: 3px 8px; font-size: 11px; }
  #mock-web .docapp-toolbar > :nth-child(1),
  #mock-web .docapp-toolbar > :nth-child(2),
  #mock-web .docapp-toolbar > :nth-child(5),
  #mock-web .docapp-toolbar > :nth-child(6) { display: none; }

  /* No sidebar in phone view */
  #mock-web .docapp-tree { display: none; }

  /* Doc surface */
  #mock-web .docapp-page {
    margin: 8px;
    padding: 12px 14px 14px;
  }
  #mock-web .doc-h1 { font-size: 14px; }
  #mock-web .doc-h2 { font-size: 12px; margin-top: 10px; }
  #mock-web .doc-p  { font-size: 12px; line-height: 1.55; }
  #mock-web .doc-ai-callout { padding: 8px 10px; margin-top: 10px; }
  #mock-web .ai-callout-body { font-size: 11px; }
  #mock-web .ai-callout-actions .ai-btn { padding: 4px 8px; font-size: 11px; }
}

/* ── Section layout ── */
.section {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--sp-12) var(--sp-6);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: var(--tr-label);
  margin-bottom: var(--sp-4);
}

.section-label .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.section-title {
  font-family: var(--font-sans);
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: var(--fw-medium);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--sp-4);
}

.section-desc {
  font-size: var(--fs-md);
  color: var(--fg-muted);
  max-width: 600px;
  line-height: 1.55;
}

.section-center .section-desc { margin: 0 auto; }
.section-center { text-align: center; }

/* ── Divider ── */
.divider {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}
.divider-line {
  height: 1px;
  background: var(--border);
}

/* ── Features Grid ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: var(--sp-9);
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.feature-item {
  padding: var(--sp-7) var(--sp-6);
  background: var(--bg);
  transition: background var(--dur-base);
}
.feature-item:hover { background: var(--bg-raised); }

.feature-icon-wrap {
  width: 36px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-md);
  margin-bottom: var(--sp-4);
  color: var(--accent);
  background: transparent;
}

.feature-icon-wrap svg { width: 20px; height: 20px; }

.feature-item h3 {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  margin-bottom: 6px;
  letter-spacing: var(--tr-snug);
  color: var(--fg);
}
.feature-item h3 code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  font-weight: var(--fw-medium);
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-edge);
  padding: 0 5px;
  border-radius: var(--r-sm);
}

.feature-item p {
  font-size: var(--fs-sm);
  color: var(--fg-muted);
  line-height: 1.55;
}

/* ── How it works — 4-col timeline ── */
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.section-head .section-label { justify-content: center; }
.section-head .section-desc { margin-left: auto; margin-right: auto; }

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-top: var(--sp-9);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.step {
  padding: var(--sp-6);
  border-left: 1px solid var(--border);
  text-align: left;
  min-width: 0;
}
.step:first-child { border-left: none; }

.step-num {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--accent);
  letter-spacing: var(--tr-label);
  margin-bottom: var(--sp-3);
}

.step h3 {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tr-snug);
  color: var(--fg);
  margin-bottom: var(--sp-2);
}
.step h3 code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-edge);
  padding: 0 5px;
  border-radius: var(--r-sm);
}

.step p {
  font-size: var(--fs-sm);
  color: var(--fg-muted);
  line-height: 1.55;
}

.step-code {
  margin-top: var(--sp-4);
  padding: 10px var(--sp-3);
  background: var(--bg-higher);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  line-height: 1.6;
  color: var(--fg-muted);
  overflow-wrap: anywhere;
  word-break: break-word;
}

/* ── Pricing ── */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-4);
  max-width: 720px;
  margin: var(--sp-9) auto 0;
}

.pricing-card {
  padding: var(--sp-7);
  border-radius: var(--r-lg);
  background: var(--bg-raised);
  border: 1px solid var(--border);
  transition: border-color var(--dur-base);
}
.pricing-card:hover { border-color: var(--border-strong); }

.pricing-card.featured {
  border-color: var(--accent-edge);
  background: linear-gradient(180deg, var(--accent-soft) 0%, transparent 40%);
  position: relative;
}

.pricing-badge {
  position: absolute;
  top: -10px; left: var(--sp-6);
  padding: 2px 10px;
  background: var(--accent);
  color: var(--accent-fg);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: var(--fw-semibold);
  border-radius: var(--r-pill);
  text-transform: uppercase;
  letter-spacing: var(--tr-label);
}

.pricing-card h3 {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--fg-subtle);
  text-transform: uppercase;
  letter-spacing: var(--tr-label);
  margin-bottom: var(--sp-2);
}

.pricing-price {
  font-family: var(--font-sans);
  font-size: 40px;
  font-weight: var(--fw-medium);
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--fg);
}
.pricing-price span {
  font-size: var(--fs-sm);
  font-weight: var(--fw-regular);
  color: var(--fg-subtle);
  letter-spacing: 0;
}

.pricing-list {
  margin: var(--sp-6) 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pricing-list li {
  font-size: var(--fs-sm);
  color: var(--fg-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}

.check {
  width: 16px; height: 16px;
  flex-shrink: 0;
  color: var(--accent);
}

/* ── CTA ── */
.cta-section {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--sp-12) var(--sp-6);
  text-align: center;
}

.cta-box {
  padding: var(--sp-10) var(--sp-8);
  border-radius: var(--r-xl);
  background: var(--bg-raised);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 480px;
  height: 240px;
  background: radial-gradient(ellipse at center, var(--accent-soft) 0%, transparent 70%);
  pointer-events: none;
}

.cta-box h2 {
  font-family: var(--font-sans);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tr-tight);
  position: relative;
  color: var(--fg);
}

.cta-box .section-desc {
  margin: var(--sp-3) auto 0;
  position: relative;
}

.cta-btn {
  margin-top: var(--sp-7);
  position: relative;
}

/* ── Footer ── */
.footer {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--sp-7) var(--sp-6);
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-xs);
  color: var(--fg-muted);
  letter-spacing: -0.02em;
}
.footer-brand .logo-mark {
  font-size: var(--fs-xs);
  color: var(--fg-muted);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--fg-subtle);
}

/* ── Scroll Reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity 0.4s var(--ease-out),
    transform 0.4s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.feature-item { opacity: 0; transform: translateY(8px); transition: all 0.4s var(--ease-out); }
.feature-item.visible { opacity: 1; transform: translateY(0); }
.feature-item:nth-child(1) { transition-delay: 0ms; }
.feature-item:nth-child(2) { transition-delay: 50ms; }
.feature-item:nth-child(3) { transition-delay: 100ms; }
.feature-item:nth-child(4) { transition-delay: 150ms; }
.feature-item:nth-child(5) { transition-delay: 200ms; }
.feature-item:nth-child(6) { transition-delay: 250ms; }

.step { opacity: 0; transform: translateY(8px); transition: all 0.4s var(--ease-out); }
.step.visible { opacity: 1; transform: translateY(0); }
.step:nth-child(1) { transition-delay: 0ms; }
.step:nth-child(2) { transition-delay: 80ms; }
.step:nth-child(3) { transition-delay: 160ms; }
.step:nth-child(4) { transition-delay: 240ms; }

.pricing-card { opacity: 0; transform: translateY(8px); transition: all 0.4s var(--ease-out); }
.pricing-card.visible { opacity: 1; transform: translateY(0); }
.pricing-card:nth-child(1) { transition-delay: 0ms; }
.pricing-card:nth-child(2) { transition-delay: 80ms; }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps .step:nth-child(2) { border-left: 1px solid var(--border); }
  .steps .step:nth-child(3) { border-left: none; border-top: 1px solid var(--border); }
  .steps .step:nth-child(4) { border-top: 1px solid var(--border); }

  /* Pricing 3-col, security, and one-grid → 1-col on tablet */
  .pricing-grid-3 { grid-template-columns: 1fr; max-width: 480px; }
  .security-list { grid-template-columns: 1fr; max-width: 560px; }
  .one-grid { grid-template-columns: 1fr; max-width: 480px; }
}

@media (max-width: 768px) {
  :root { --nav-h: 56px; }

  .nav-links { display: none; }
  .mobile-toggle { display: flex; }
  .mobile-menu { display: flex; }

  .hero { padding: calc(var(--nav-h) + var(--sp-8)) var(--sp-5) var(--sp-9); }
  .hero h1 { font-size: clamp(32px, 8vw, 48px); }

  .section { padding: var(--sp-10) var(--sp-5); }
  .features-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .steps .step { border-left: none; border-top: 1px solid var(--border); }
  .steps .step:first-child { border-top: none; }
  .pricing-grid  { grid-template-columns: 1fr; }
  .cta-box { padding: var(--sp-9) var(--sp-6); }
  .footer-inner {
    flex-direction: column;
    gap: var(--sp-2);
    text-align: center;
  }
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal, .feature-item, .step, .pricing-card {
    opacity: 1;
    transform: none;
  }
  .term-cursor, .doc-caret, .remote-caret {
    animation: none !important;
    opacity: 1;
  }
}

/* ── Step code accents ── */
.step-prompt { color: var(--accent); font-weight: var(--fw-medium); }
.step-dim    { color: var(--fg-subtle); }
.step-info   { color: var(--info); }
.step-ok     { color: var(--success); font-weight: var(--fw-medium); }

/* ── FAQ width ── */
.section-faq { max-width: 1040px; }

/* ── Proof band ── */
.proof-quote {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.35;
  color: var(--fg);
  letter-spacing: -0.01em;
  margin: var(--sp-4) auto 0;
  max-width: 760px;
}
.proof-attrib {
  margin-top: var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--fg-subtle);
  text-transform: uppercase;
  letter-spacing: var(--tr-label);
}
.proof-logos {
  margin-top: var(--sp-7);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-6) var(--sp-9);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: var(--tr-label);
  list-style: none;
  padding: 0;
}
.proof-logos li {
  padding: 6px 14px;
  border: 1px dashed var(--border);
  border-radius: var(--r-sm);
}

/* ── Security list ── */
.security-list {
  margin: var(--sp-9) auto 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-5);
  list-style: none;
  padding: 0;
  max-width: 880px;
  text-align: left;
}
.security-list li {
  padding: var(--sp-5) var(--sp-6);
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
}
.security-list h3 {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  color: var(--fg);
  margin-bottom: 6px;
  letter-spacing: var(--tr-snug);
}
.security-list p {
  font-size: var(--fs-sm);
  color: var(--fg-muted);
  line-height: 1.55;
}
.security-list code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0 4px;
  border-radius: var(--r-xs);
}

/* ── FAQ ── */
.faq-list {
  margin: var(--sp-9) auto 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.faq-list details {
  min-width: 0;
  background: var(--bg);
  border: 0;
  border-radius: 0;
  padding: 0;
  transition: background var(--dur-base);
}
.faq-list details:hover,
.faq-list details[open] { background: var(--bg-raised); }
.faq-list summary {
  min-height: 72px;
  padding: var(--sp-5) var(--sp-6);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  color: var(--fg);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  letter-spacing: var(--tr-snug);
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: var(--fs-lg);
  color: var(--accent);
  transition: transform var(--dur-base);
  flex-shrink: 0;
}
.faq-list details[open] summary::after { transform: rotate(45deg); }
.faq-list details > p {
  max-width: 48ch;
  padding: 0 var(--sp-6) var(--sp-5);
  font-size: var(--fs-sm);
  color: var(--fg-muted);
  line-height: 1.6;
}
.faq-list code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0 4px;
  border-radius: var(--r-xs);
}

@media (max-width: 768px) {
  .faq-list { grid-template-columns: 1fr; }
}

/* ── 3-col pricing ── */
.pricing-grid-3 {
  grid-template-columns: repeat(3, 1fr);
  max-width: 1080px;
}
.pricing-card .pricing-list { min-height: 160px; }

/* ── Make existing tree icons inert ── */
.tree-item { user-select: none; }

/* ── <=480px tier ── */
@media (max-width: 480px) {
  .hero h1 br { display: none; }
  .hero { padding: calc(var(--nav-h) + var(--sp-7)) var(--sp-4) var(--sp-8); }
  .section { padding: var(--sp-9) var(--sp-4); }
  .cta-section { padding: var(--sp-9) var(--sp-4); }
  .cta-box { padding: var(--sp-8) var(--sp-5); }
  .auth-modal { padding: var(--sp-4); }
  .auth-card { padding: var(--sp-7) var(--sp-5); }
  .step-code { font-size: 10px; }
}

/* ── Hero split layout (design system) ── */
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--sp-11);
  align-items: center;
  text-align: left;
}
.hero-grid > .hero-copy {
  text-align: left;
}
.hero-grid h1 {
  margin-left: 0;
  margin-right: 0;
}
.hero-grid .hero-sub {
  margin-left: 0;
  margin-right: 0;
  max-width: 520px;
}
.hero-grid .hero-cta {
  justify-content: flex-start;
}
.hero-mini-mono {
  margin-top: var(--sp-7);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-subtle);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  letter-spacing: 0.02em;
}
.hero-mini-mono .ok { color: var(--success); }
.hero-mini-mono .sep { color: var(--ink-5); }
.hero-terminal {
  background: var(--ink-0);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.hero-terminal .term-chrome {
  display: flex;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
  align-items: center;
}
.hero-terminal .term-chrome-title {
  flex: 1;
  min-width: 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-subtle);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.hero-terminal .term-body {
  padding: var(--sp-4) 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.75;
}
.hero-terminal .term-body .p { color: var(--accent); }
.hero-terminal .term-body .dim { color: var(--fg-subtle); }
.hero-terminal .term-body .ok { color: var(--success); }
.hero-terminal .term-body .ai { color: var(--ai); }

/* ── Section heads — split row variant (heading + right meta) ── */
.section-head--row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--sp-9);
  flex-wrap: wrap;
  width: 100%;
  max-width: 960px;
  margin: 0 auto var(--sp-9);
  text-align: left;
}
.section-head--row .head-copy {
  max-width: 560px;
  text-align: left;
}
.section-head--row .section-label { justify-content: flex-start; }
.section-head--row .section-desc { margin-left: 0; margin-right: 0; }
.section-head--row .head-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-subtle);
  letter-spacing: 0.04em;
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
  margin-top: 52px; /* align with h2 title baseline */
  flex-shrink: 0;
}
.section-head--row .head-meta .ok { color: var(--success); }

/* ── Problem split: pullquote + tool list ── */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-10);
  align-items: start;
  text-align: left;
}
.pullquote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(22px, 2.4vw, 28px);
  line-height: 1.35;
  color: var(--fg);
  font-weight: var(--fw-regular);
  letter-spacing: 0;
}
.pullquote-mark {
  color: var(--accent);
  font-style: normal;
  font-family: var(--font-serif);
}
.tool-list {
  margin-top: var(--sp-7);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}
.tool-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.tool-row .name {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  color: var(--fg);
}
.tool-row .fate {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-subtle);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.tool-row .fate .x { color: var(--danger); }

/* ── Hero responsive ── */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: var(--sp-9); }
  .split { grid-template-columns: 1fr; gap: var(--sp-7); }
  .section-head--row {
    align-items: flex-start;
    gap: var(--sp-5);
  }
  .section-head--row .head-meta { margin-top: 0; }
}

/* ── One band ── */
.label-strong {
  color: var(--fg);
  font-weight: var(--fw-semibold);
}
.one-grid {
  margin: var(--sp-9) auto 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  list-style: none;
  padding: 0;
  max-width: 1080px;
  text-align: left;
}
.one-grid li {
  background: var(--bg);
  padding: var(--sp-7) var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  transition: background var(--dur-base);
}
.one-grid li:hover { background: var(--bg-raised); }
.one-num {
  font-family: var(--font-mono);
  font-size: clamp(40px, 5vw, 64px);
  font-weight: var(--fw-medium);
  color: var(--accent);
  letter-spacing: -0.04em;
  line-height: 1;
}
.one-label {
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  color: var(--fg);
  letter-spacing: var(--tr-snug);
}
.one-desc {
  font-size: var(--fs-sm);
  color: var(--fg-muted);
  line-height: 1.55;
}