/* FaultMind landing — mobile-first, dark-first, same design tokens as the app */

:root {
  color-scheme: dark;
  --bg: #0b0f14;
  --surface-1: #11161d;
  --surface-2: #171e27;
  --border: #232c38;
  --ink: #e8edf4;
  --ink-2: #9aa7b8;
  --ink-3: #64718a;
  --brand: #e8a33d;
  --brand-ink: #1a1206;
  --series-1: #3987e5;
  --series-2: #d95926;
  --series-3: #199e70;
  --sev-critical: #e66767;
  --ok: #199e70;
  --radius: 14px;
  --maxw: 1120px;
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ------------------------------------------------ nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 60px; gap: 12px;
}
.logo { font-size: 20px; font-weight: 800; letter-spacing: -0.02em; padding: 10px 0; }
.logo em { color: var(--brand); font-style: normal; }
.nav-links { display: none; gap: 26px; font-size: 14px; color: var(--ink-2); }
.nav-links a { padding: 8px 0; }
.nav-links a:hover { color: var(--ink); }
.nav-right { display: flex; align-items: center; gap: 10px; }
.lang {
  font-size: 12px; font-weight: 700; letter-spacing: 0.06em;
  color: var(--ink-2); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 12px; min-height: 40px;
  display: inline-flex; align-items: center;
}
.lang:hover { color: var(--ink); border-color: var(--ink-3); }

/* ------------------------------------------------ buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; border-radius: 10px; font-weight: 700; font-size: 15px;
  padding: 12px 20px; min-height: 46px; cursor: pointer;
  white-space: nowrap;
  transition: filter 120ms ease, border-color 120ms ease;
}
.btn-brand { background: var(--brand); color: var(--brand-ink); }
.btn-brand:hover { filter: brightness(1.08); }
.btn-ghost { border: 1px solid var(--border); color: var(--ink-2); }
.btn-ghost:hover { color: var(--ink); border-color: var(--ink-3); }
.btn-sm { padding: 9px 14px; min-height: 40px; font-size: 13px; }

/* ------------------------------------------------ hero */
.hero {
  position: relative;
  padding: 72px 0 40px;
  overflow: clip;
}
.hero::before {
  content: ""; position: absolute; inset: -40% -20% auto;
  height: 130%;
  background:
    radial-gradient(600px 320px at 75% 10%, color-mix(in srgb, var(--brand) 14%, transparent), transparent 70%),
    radial-gradient(520px 300px at 15% 30%, color-mix(in srgb, var(--series-1) 10%, transparent), transparent 70%);
  pointer-events: none;
}
.hero-grid { position: relative; display: grid; gap: 40px; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 700; letter-spacing: 0.04em;
  color: var(--brand); background: color-mix(in srgb, var(--brand) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--brand) 35%, transparent);
  padding: 7px 13px; border-radius: 999px;
}
h1 {
  font-size: clamp(2.1rem, 6.5vw, 3.6rem);
  line-height: 1.08; letter-spacing: -0.03em; font-weight: 800;
  margin: 20px 0 18px;
}
.hero p.lede { font-size: clamp(1rem, 2.4vw, 1.15rem); color: var(--ink-2); max-width: 44rem; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }
.chip {
  font-size: 12.5px; color: var(--ink-2);
  border: 1px solid var(--border); background: var(--surface-1);
  border-radius: 999px; padding: 7px 12px;
}
.chip b { color: var(--ok); font-weight: 700; }

/* terminal */
.term {
  background: var(--surface-1);
  border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 20px 60px -30px rgb(0 0 0 / 0.8);
  overflow: hidden;
}
.term-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 11px 14px; border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.term-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--border); }
.term-title { margin-left: 6px; font-size: 12px; color: var(--ink-3); }
.term-body {
  padding: 16px 16px 18px; font-size: 12.5px; line-height: 1.75;
  min-height: 300px;
}
.term-body div { display: flex; gap: 8px; }
.tl-agent { flex-shrink: 0; font-weight: 700; }
.tl-ingest { color: var(--series-1); }
.tl-geom { color: var(--series-3); }
.tl-struct { color: var(--brand); }
.tl-unc { color: var(--series-2); }
.tl-done { color: var(--ok); }
.tl-crit { color: var(--sev-critical); }
.tl-msg { color: var(--ink-2); overflow-wrap: anywhere; }
.tl-msg b { color: var(--ink); font-weight: 600; }
.caret {
  display: inline-block; width: 8px; height: 15px;
  background: var(--brand); vertical-align: -2px;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ------------------------------------------------ sections */
section { padding: 56px 0; }
.kicker {
  font-size: 12px; font-weight: 800; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--brand);
}
h2 {
  font-size: clamp(1.5rem, 4.5vw, 2.2rem);
  letter-spacing: -0.02em; line-height: 1.15; margin: 10px 0 14px;
}
.sub { color: var(--ink-2); max-width: 46rem; }

/* citations strip */
.cites {
  border-block: 1px solid var(--border);
  padding: 22px 0;
}
.cites-inner {
  display: flex; flex-wrap: wrap; gap: 10px 22px; align-items: baseline;
  font-size: 13px; color: var(--ink-3);
}
.cites-inner .lead { color: var(--ink-2); font-weight: 600; }
.cites-inner span:not(.lead) { white-space: nowrap; }

/* bento */
.bento { display: grid; gap: 14px; margin-top: 34px; }
.card {
  background: var(--surface-1); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  display: flex; flex-direction: column; gap: 10px;
}
.card h3 { font-size: 17px; letter-spacing: -0.01em; }
.card p { font-size: 14px; color: var(--ink-2); }
.card .tag {
  margin-top: auto; padding-top: 10px;
  font-size: 11.5px; color: var(--ink-3);
}
.card-icon { color: var(--brand); display: inline-flex; }
.card-icon svg { width: 22px; height: 22px; }
.card-hero { border-color: color-mix(in srgb, var(--brand) 35%, var(--border)); }
.card-hero h3 { font-size: 19px; }

/* steps */
.steps { display: grid; gap: 14px; margin-top: 34px; counter-reset: step; }
.step {
  background: var(--surface-1); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
}
.step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  font-family: ui-monospace, Menlo, monospace;
  font-size: 13px; font-weight: 700; color: var(--brand);
}
.step h3 { margin: 8px 0 8px; font-size: 17px; }
.step p { font-size: 14px; color: var(--ink-2); }
.step .lock { color: var(--ok); font-size: 13px; margin-top: 8px; display: block; }

/* stats */
.stats {
  display: grid; gap: 12px; margin-top: 34px;
  grid-template-columns: repeat(2, 1fr);
}
.stat {
  background: var(--surface-1); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
}
.stat b {
  display: block; font-size: clamp(1.4rem, 4vw, 1.9rem);
  letter-spacing: -0.02em; color: var(--ink);
}
.stat span { font-size: 12.5px; color: var(--ink-3); }

/* beta */
.beta-card {
  background:
    radial-gradient(500px 260px at 85% -10%, color-mix(in srgb, var(--brand) 12%, transparent), transparent 70%),
    var(--surface-1);
  border: 1px solid color-mix(in srgb, var(--brand) 30%, var(--border));
  border-radius: 18px; padding: 30px 24px; margin-top: 34px;
  display: grid; gap: 24px;
}
.beta-card h3 { font-size: 20px; letter-spacing: -0.01em; }
.beta-list { list-style: none; display: grid; gap: 9px; font-size: 14px; color: var(--ink-2); }
.beta-list li { padding-left: 24px; position: relative; }
.beta-list li::before { content: "✓"; position: absolute; left: 0; color: var(--ok); font-weight: 700; }
.beta-list.give li::before { content: "↺"; color: var(--brand); }
.beta-note { font-size: 12px; color: var(--ink-3); }

/* footer */
footer {
  border-top: 1px solid var(--border);
  padding: 34px 0 110px; font-size: 13px; color: var(--ink-3);
}
.foot-inner { display: flex; flex-wrap: wrap; gap: 14px 30px; justify-content: space-between; }
footer a {
  color: var(--ink-2);
  display: inline-block; padding: 10px 2px; /* comfortable touch targets */
}
footer a:hover { color: var(--ink); }

/* mobile sticky CTA */
.sticky-cta {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--border);
  transform: translateY(110%);
  transition: transform 240ms ease;
}
.sticky-cta.show { transform: none; }
.sticky-cta .btn { width: 100%; }

/* inline flat icons (stroke = currentColor, one color per context) */
.ic {
  width: 15px; height: 15px; flex-shrink: 0;
  vertical-align: -2px;
}
.step .lock { display: inline-flex; align-items: center; gap: 6px; }
.tl-ic { width: 13px; height: 13px; vertical-align: -2px; margin-right: 2px; }

/* nav: the primary CTA hides on small screens (sticky bottom bar covers it) */
.nav-cta { display: none; }

/* ------------------------------------------------ ≥ 760px */
@media (min-width: 760px) {
  .nav-cta { display: inline-flex; }
  .wrap { padding: 0 32px; }
  .nav-links { display: flex; }
  .hero { padding: 96px 0 64px; }
  .hero-grid { grid-template-columns: 1.05fr 0.95fr; align-items: center; gap: 48px; }
  .bento { grid-template-columns: repeat(3, 1fr); }
  .card-hero { grid-column: span 2; }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .stats { grid-template-columns: repeat(4, 1fr); }
  .beta-card { grid-template-columns: 1.2fr 1fr 1fr; padding: 38px; align-items: start; }
  .beta-cta { grid-column: 1 / -1; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
  section { padding: 84px 0; }
  footer { padding-bottom: 40px; }
  .sticky-cta { display: none; }
}