/* ===========================================================
   simdcomp — landing page theme
   Visual design adapted from the simdjson.org modern theme.
   =========================================================== */

:root {
  --bg: #0b0f1a;
  --bg-elev: #11172a;
  --surface: #ffffff;
  --surface-alt: #f6f8fb;
  --border: #e4e8ef;
  --border-strong: #d4dae4;

  --text: #0e1422;
  --text-muted: #5a6577;
  --text-invert: #f0f4fb;
  --text-invert-muted: #97a3bf;

  --brand: #4f7cff;
  --brand-2: #8b5cf6;
  --brand-3: #22d3ee;
  --accent: #facc15;

  --code-bg: #0c1226;
  --code-text: #d6e1ff;
  --code-comment: #6b7a99;
  --code-kw: #c084fc;
  --code-str: #5eead4;
  --code-fn: #fbbf24;
  --code-num: #fca5a5;

  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(13, 22, 50, 0.06), 0 2px 6px rgba(13, 22, 50, 0.04);
  --shadow-md: 0 8px 24px rgba(13, 22, 50, 0.08);
  --shadow-lg: 0 24px 60px rgba(13, 22, 50, 0.12);

  --max: 1180px;
  --max-narrow: 820px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { overflow-x: clip; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--brand); text-decoration: none; transition: color .15s ease; }
a:hover { color: #2f5be0; text-decoration: underline; }

h1, h2, h3, h4 {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.2;
}

h1 { font-size: clamp(2.2rem, 4.4vw, 3.4rem); margin: 0 0 1rem; }
h2 { font-size: clamp(1.65rem, 2.8vw, 2.2rem); margin: 0 0 .8rem; }
h3 { font-size: 1.15rem; margin: 0 0 .5rem; }
h4 { font-size: 1rem; margin: 0 0 .5rem; }

p { margin: 0 0 1rem; }

code, pre, .mono {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.muted { color: var(--text-muted); }
.small { font-size: .875rem; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.container.narrow { max-width: var(--max-narrow); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 10px;
  font-weight: 600;
  font-size: .98rem;
  line-height: 1;
  text-decoration: none;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease, color .12s ease, border-color .12s ease;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 100%);
  box-shadow: 0 8px 24px rgba(79, 124, 255, 0.35);
}
.btn-primary:hover { color: #fff; box-shadow: 0 12px 28px rgba(79, 124, 255, 0.45); }
.btn-ghost {
  color: var(--text-invert);
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { color: var(--text-invert); background: rgba(255, 255, 255, 0.12); border-color: rgba(255, 255, 255, 0.3); }
.section .btn-ghost { color: var(--text); background: var(--surface); border-color: var(--border-strong); }
.section .btn-ghost:hover { background: var(--surface-alt); }

/* ---------- Navigation ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 15, 26, 0.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-invert);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: 1.08rem;
}
.brand:hover { text-decoration: none; color: var(--text-invert); }
.brand-logo { width: 28px; height: 28px; }
.brand-name { color: #fff; }
.nav-links {
  display: flex;
  gap: 6px;
  margin-left: auto;
  align-items: center;
}
.nav-link {
  color: var(--text-invert-muted);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: .95rem;
  font-weight: 500;
}
.nav-link:hover { color: #fff; background: rgba(255, 255, 255, 0.06); text-decoration: none; }
.nav-link.active { color: #fff; }
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.05);
}
.nav-cta:hover { background: rgba(255, 255, 255, 0.12); }

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 40px; height: 40px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 8px;
  cursor: pointer;
  position: relative;
}
.nav-toggle span {
  display: block;
  width: 18px; height: 2px;
  background: #fff;
  margin: 3px auto;
  transition: transform .2s ease, opacity .2s ease;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  color: var(--text-invert);
  background: var(--bg);
  overflow: hidden;
  padding: 80px 0 96px;
}
.hero-bg {
  position: absolute; inset: 0;
  pointer-events: none;
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at top, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at top, black 30%, transparent 75%);
}
.hero-glow {
  position: absolute;
  top: -200px; left: 50%;
  width: 900px; height: 700px;
  transform: translateX(-50%);
  background:
    radial-gradient(closest-side, rgba(79, 124, 255, 0.45), transparent 70%),
    radial-gradient(closest-side at 70% 60%, rgba(139, 92, 246, 0.35), transparent 70%),
    radial-gradient(closest-side at 30% 70%, rgba(34, 211, 238, 0.25), transparent 70%);
  filter: blur(40px);
  opacity: 0.9;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}
.hero-content { min-width: 0; }
.hero-code { min-width: 0; }
.hero-code .code-window { max-width: 100%; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.05);
  font-size: .82rem;
  color: var(--text-invert-muted);
  margin-bottom: 24px;
}
.hero-eyebrow .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--brand-3);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.2);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.2); }
  50% { box-shadow: 0 0 0 8px rgba(34, 211, 238, 0); }
}
.hero-title {
  color: #fff;
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  line-height: 1.05;
  margin: 0 0 16px;
  background: linear-gradient(180deg, #ffffff 60%, #b3c2e6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub {
  color: var(--text-invert-muted);
  font-size: 1.12rem;
  line-height: 1.6;
  margin: 0 0 28px;
  max-width: 560px;
}
.hero-sub strong { color: #fff; font-weight: 600; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
.hero-install {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  max-width: 100%;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(0,0,0,0.3);
  font-family: 'JetBrains Mono', monospace;
  font-size: .9rem;
  color: var(--code-text);
}
.hero-install .cmd { white-space: nowrap; }
.hero-install .prompt { color: var(--brand-3); margin-right: 4px; }
.hero-install .sep { color: var(--text-invert-muted); }

/* Code window */
.code-window {
  border-radius: 12px;
  background: var(--code-bg);
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.code-titlebar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 14px;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.code-titlebar .dotr, .code-titlebar .doty, .code-titlebar .dotg {
  width: 12px; height: 12px; border-radius: 50%;
}
.code-titlebar .dotr { background: #ff5f56; }
.code-titlebar .doty { background: #ffbd2e; }
.code-titlebar .dotg { background: #27c93f; }
.code-filename {
  margin-left: 8px;
  font-size: .82rem;
  color: var(--text-invert-muted);
  font-family: 'JetBrains Mono', monospace;
}
.code-body {
  margin: 0;
  padding: 18px 20px;
  color: var(--code-text);
  font-family: 'JetBrains Mono', monospace;
  font-size: .88rem;
  line-height: 1.6;
  overflow-x: auto;
  background: transparent;
}
.code-body .kw { color: var(--code-kw); }
.code-body .str { color: var(--code-str); }
.code-body .fn { color: var(--code-fn); }
.code-body .num { color: var(--code-num); }
.code-body .comment { color: var(--code-comment); font-style: italic; }
.code-body .prompt { color: var(--brand-3); user-select: none; }

/* ---------- Stats strip ---------- */
.stats {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 32px 0;
}
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat { text-align: center; }
.stat-value {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
}
.stat-value .unit {
  font-size: 0.6em;
  margin-left: 4px;
  opacity: 0.9;
  -webkit-text-fill-color: initial;
  background: none;
  -webkit-background-clip: initial;
          background-clip: initial;
  color: var(--brand-2);
}
.stat-label { color: var(--text-muted); font-size: .92rem; margin-top: 4px; }

/* ---------- Sections ---------- */
.section { padding: 88px 0; }
.section-alt { background: var(--surface-alt); }
.section-head { max-width: 720px; margin: 0 0 48px; }
.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--brand);
  margin-bottom: 14px;
}
.lead { font-size: 1.08rem; color: var(--text-muted); max-width: 60ch; }

/* Two-column */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.two-col > * { min-width: 0; }
.two-col .code-window { max-width: 100%; }
.install-note { margin-top: 1rem; }
.install-note code { overflow-wrap: anywhere; word-break: break-word; }

/* Card grid (highlights) */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.card {
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}
.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(79,124,255,0.12), rgba(139,92,246,0.12));
  color: var(--brand);
  margin-bottom: 14px;
}
.card p { color: var(--text-muted); margin: 0; }

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.feature {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.feature:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--border-strong); }
.feature-tag {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(79,124,255,0.12), rgba(139,92,246,0.14));
  color: var(--brand);
  font-family: 'JetBrains Mono', monospace;
  font-size: .76rem;
  font-weight: 600;
  margin-bottom: 12px;
}
.feature p { color: var(--text-muted); margin: 0; }
.feature p a { color: var(--brand); font-weight: 500; }

/* Used by */
.usedby { background: var(--surface); }
.usedby-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}
.usedby-card {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 72px;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  font-weight: 600;
  font-size: 1.02rem;
  background: var(--surface);
  text-align: center;
  padding: 0 10px;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease, color .15s ease;
}
.usedby-card:hover {
  text-decoration: none;
  color: var(--brand);
  border-color: var(--brand);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.usedby-foot { text-align: center; margin-top: 20px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg);
  color: var(--text-invert-muted);
  padding: 64px 0 40px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand .footer-logo { width: 36px; height: 36px; margin-bottom: 12px; }
.footer-tag { color: var(--text-invert); font-weight: 500; margin: 0 0 12px; max-width: 32ch; }
.footer-col h4 {
  color: #fff;
  text-transform: uppercase;
  font-size: .78rem;
  letter-spacing: 0.14em;
  margin-bottom: 14px;
}
.footer-col a {
  display: block;
  color: var(--text-invert-muted);
  font-size: .95rem;
  padding: 4px 0;
}
.footer-col a:hover { color: #fff; text-decoration: none; }
.gh-star { color-scheme: light; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero { padding: 64px 0 72px; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 24px; }
  .two-col { grid-template-columns: 1fr; gap: 32px; }
  .card-grid, .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .usedby-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .section { padding: 64px 0; }
}

@media (max-width: 720px) {
  .hero { padding: 56px 0 64px; }
  .hero-title { font-size: clamp(1.75rem, 7vw, 2.4rem); }
  .hero-sub { font-size: 1rem; }
  .hero-install {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    width: 100%;
    font-size: .82rem;
  }
  .hero-install .sep { display: none; }
  .code-body { font-size: .78rem; padding: 14px 14px; }
  .code-filename { font-size: .76rem; }
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute;
    left: 0; right: 0; top: 64px;
    background: var(--bg);
    border-top: 1px solid rgba(255,255,255,0.06);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    padding: 12px 24px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-link { padding: 12px 14px; }
  .card-grid, .feature-grid { grid-template-columns: 1fr; }
  .usedby-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }
}