/* osctrl.io — site styles
 * Design tokens mirror the osctrl frontend (frontend/src/styles/tokens.css):
 * dark "signal" teal brand on near-black surfaces.
 * Fonts match the frontend: Inter (body), Space Grotesk (display),
 * Bai Jamjuree (wordmark), IBM Plex Mono (code).
 */

/* Bai Jamjuree — wordmark font, self-hosted like the frontend does. */
@font-face {
  font-family: 'Bai Jamjuree';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/bai-jamjuree-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Bai Jamjuree';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/bai-jamjuree-600.woff2') format('woff2');
}
@font-face {
  font-family: 'Bai Jamjuree';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/bai-jamjuree-700.woff2') format('woff2');
}

:root {
  color-scheme: dark;

  /* surfaces */
  --bg-0: #07090c;
  --bg-1: #0c1014;
  --bg-2: #11171d;
  --bg-3: #18202a;
  --border: #1e2934;
  --border-strong: #2a3845;

  /* text */
  --text-1: #ecf1f6;
  --text-2: #a6b3c0;
  --text-3: #6a7886;
  --text-link: #5fb8ff;

  /* brand */
  --signal: #2bc4be;
  --signal-bright: #5fe3df;
  --signal-deep: #0a6b66;
  --signal-glow: rgba(43, 196, 190, 0.35);

  /* semantic */
  --success: #4ade80;
  --warning: #fbbf24;
  --danger: #f87171;
  --info: #67c0ff;

  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-wordmark: 'Bai Jamjuree', 'Space Grotesk', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --radius: 10px;
  --maxw: 1080px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-feature-settings: "cv11", "ss01";
  background: var(--bg-0);
  color: var(--text-1);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  letter-spacing: -0.015em;
}

a { color: var(--text-link); text-decoration: none; }
a:hover { color: var(--signal-bright); }

code, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
  font-variant-numeric: tabular-nums;
}

code.inline {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1em 0.4em;
  color: var(--signal-bright);
}

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

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg-0) 72%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-wordmark);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: 1.2rem;
  color: var(--text-1);
}
.nav-logo img { height: 32px; width: auto; }
.nav-logo:hover { color: var(--signal-bright); }

.nav-links {
  display: flex;
  gap: 22px;
  margin-left: auto;
  align-items: center;
}
.nav-links a {
  color: var(--text-2);
  font-size: 0.95rem;
  font-weight: 500;
}
.nav-links a:hover, .nav-links a.active { color: var(--text-1); }
.nav-links a.active { color: var(--signal); }

.nav-cta {
  background: linear-gradient(to bottom, var(--signal-bright), var(--signal));
  color: #051010 !important;
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 600;
  border: 1px solid rgba(43, 196, 190, 0.6);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25), 0 1px 14px -2px var(--signal-glow);
}
.nav-cta:hover { filter: brightness(1.1); }

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 80px;
  text-align: center;
  background: radial-gradient(ellipse 70% 50% at 50% -10%, rgba(43, 196, 190, 0.14), transparent);
  border-bottom: 1px solid var(--border);
}

.hero img.hero-logo { height: 110px; margin-bottom: 28px; }

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.hero h1 .accent { color: var(--signal); }

.hero p.tagline {
  margin: 20px auto 0;
  max-width: 640px;
  font-size: 1.2rem;
  color: var(--text-2);
}

.hero-actions {
  margin-top: 36px;
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 26px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 120ms ease-out;
}
.btn-primary {
  background: linear-gradient(to bottom, var(--signal-bright), var(--signal));
  color: #051010;
  border: 1px solid rgba(43, 196, 190, 0.6);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25), 0 1px 14px -2px var(--signal-glow);
}
.btn-primary:hover { filter: brightness(1.1); color: #051010; transform: translateY(-1px); }
.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text-1);
  background: var(--bg-2);
}
.btn-ghost:hover { background: var(--bg-3); border-color: var(--border-strong); color: var(--text-1); }

.hero-badges {
  margin-top: 32px;
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--text-3);
  font-family: var(--font-mono);
}
.hero-badges span {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 14px;
  background: color-mix(in srgb, var(--bg-1) 80%, transparent);
}

/* ---------- Sections ---------- */
section { padding: 72px 0; }
section.alt {
  background: color-mix(in srgb, var(--bg-1) 72%, transparent);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head { text-align: center; margin-bottom: 48px; }
.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
}
.section-head p {
  margin-top: 12px;
  color: var(--text-2);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--signal);
  margin-bottom: 12px;
}

/* ---------- Cards ---------- */
.grid {
  display: grid;
  gap: 20px;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: color-mix(in srgb, var(--bg-2) 88%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: border-color 120ms ease-out, box-shadow 120ms ease-out;
}
.card:hover {
  border-color: var(--signal);
  box-shadow: 0 0 18px -6px var(--signal-glow);
}

.card .icon { font-size: 1.7rem; margin-bottom: 14px; display: block; }
.card h3 { font-size: 1.08rem; font-weight: 600; margin-bottom: 8px; }
.card p { color: var(--text-2); font-size: 0.95rem; }
.card ul { color: var(--text-2); font-size: 0.95rem; padding-left: 20px; margin-top: 8px; }
.card li { margin-bottom: 6px; }
.card .more { display: inline-block; margin-top: 14px; font-size: 0.9rem; font-weight: 600; }

.card.component h3 code {
  color: var(--signal-bright);
  font-size: 1rem;
}
.card .badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: 4px;
  padding: 2px 8px;
  margin-left: 8px;
  vertical-align: middle;
}
.badge.legacy { background: rgba(251, 191, 36, 0.12); color: var(--warning); border: 1px solid rgba(251, 191, 36, 0.3); }
.badge.new { background: rgba(43, 196, 190, 0.1); color: var(--signal-bright); border: 1px solid rgba(43, 196, 190, 0.3); }

/* ---------- Code blocks ---------- */
pre.code {
  background: color-mix(in srgb, var(--bg-1) 92%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  overflow-x: auto;
  line-height: 1.55;
  color: var(--text-1);
}
pre.code .c { color: var(--text-3); }        /* comment */
pre.code .p { color: var(--signal); }        /* prompt/keyword */
pre.code .s { color: var(--success); }       /* string */

.code-caption {
  font-size: 0.85rem;
  color: var(--text-3);
  margin-top: 10px;
}

/* ---------- Steps ---------- */
.steps { display: grid; gap: 20px; grid-template-columns: repeat(3, 1fr); }
.step { position: relative; }
.step .num {
  display: inline-flex;
  width: 34px; height: 34px;
  align-items: center;
  justify-content: center;
  background: linear-gradient(to bottom, var(--signal-bright), var(--signal));
  color: #051010;
  font-weight: 700;
  font-family: var(--font-mono);
  border-radius: 999px;
  margin-bottom: 14px;
  box-shadow: 0 1px 14px -2px var(--signal-glow);
}

/* ---------- Feature rows ---------- */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 40px 0;
}
.feature-row + .feature-row { border-top: 1px solid var(--border); }
.feature-row h3 { font-size: 1.35rem; margin-bottom: 12px; }
.feature-row p { color: var(--text-2); }
.feature-row ul { color: var(--text-2); padding-left: 20px; margin-top: 10px; }
.feature-row li { margin-bottom: 6px; }

/* ---------- Tables ---------- */
table.spec {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
table.spec th, table.spec td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
table.spec th {
  color: var(--text-3);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
}
table.spec td:first-child { font-weight: 600; white-space: nowrap; }
table.spec td { color: var(--text-2); }
table.spec td strong { color: var(--text-1); }

/* ---------- Architecture diagram ---------- */
.diagram-box {
  background: color-mix(in srgb, var(--bg-2) 88%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  overflow-x: auto;
}
.diagram-box svg { display: block; margin: 0 auto; max-width: 100%; height: auto; }

/* ---------- CTA band ---------- */
.cta-band {
  text-align: center;
  padding: 72px 0;
  background:
    radial-gradient(ellipse 60% 80% at 50% 120%, rgba(43, 196, 190, 0.12), transparent),
    color-mix(in srgb, var(--bg-1) 72%, transparent);
  border-top: 1px solid var(--border);
}
.cta-band h2 { font-size: 1.8rem; margin-bottom: 12px; }
.cta-band p { color: var(--text-2); margin-bottom: 28px; }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 40px;
  background: color-mix(in srgb, var(--bg-0) 78%, transparent);
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
}
.footer-inner h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-3);
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-weight: 600;
}
.footer-inner ul { list-style: none; }
.footer-inner li { margin-bottom: 8px; }
.footer-inner a { color: var(--text-2); font-size: 0.92rem; }
.footer-inner a:hover { color: var(--signal-bright); }
.footer-brand img { height: 40px; margin-bottom: 12px; }
.footer-brand p { color: var(--text-3); font-size: 0.9rem; max-width: 280px; }
.footer-bottom {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--text-3);
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Page header (inner pages) ---------- */
.page-head {
  padding: 72px 0 56px;
  background: radial-gradient(ellipse 60% 70% at 50% -20%, rgba(43, 196, 190, 0.12), transparent);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.page-head h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); font-weight: 700; letter-spacing: -0.02em; }
.page-head p { margin: 14px auto 0; max-width: 680px; color: var(--text-2); font-size: 1.1rem; }

/* ---------- Prose ---------- */
.prose h2 { font-size: 1.5rem; margin: 40px 0 14px; }
.prose h3 { font-size: 1.15rem; margin: 28px 0 10px; }
.prose p { color: var(--text-2); margin-bottom: 14px; }
.prose ul { color: var(--text-2); padding-left: 22px; margin-bottom: 14px; }
.prose li { margin-bottom: 6px; }

/* ---------- Cyberpunk background layers ---------- */
#cyber-bg {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  display: block;
  background-color: var(--bg-0);
  background-image: url('circuit.svg');
  background-size: 304px 304px;
  background-repeat: repeat;
}

#cyber-scan {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    rgba(4, 7, 9, 0.10) 0px,
    rgba(4, 7, 9, 0.10) 1px,
    transparent 1px,
    transparent 3px
  );
  mix-blend-mode: multiply;
}

.hero h1 .accent {
  text-shadow:
    0 0 14px rgba(95, 227, 223, 0.45),
    0 0 42px rgba(43, 196, 190, 0.3);
  animation: neonPulse 3.2s ease-in-out infinite;
}

@keyframes neonPulse {
  0%, 100% {
    text-shadow:
      0 0 14px rgba(95, 227, 223, 0.45),
      0 0 42px rgba(43, 196, 190, 0.3);
  }
  50% {
    text-shadow:
      0 0 24px rgba(95, 227, 223, 0.75),
      0 0 64px rgba(43, 196, 190, 0.5),
      0 0 90px rgba(103, 192, 255, 0.22);
  }
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.6s ease, transform 0.65s cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Reduced motion — per the frontend brand guide: transitions become
 * instant, pulses and shimmers stop. */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero h1 .accent { animation: none; }
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .grid-3, .grid-4, .steps { grid-template-columns: 1fr 1fr; }
  .feature-row { grid-template-columns: 1fr; gap: 20px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4, .steps { grid-template-columns: 1fr; }
  .nav-links { gap: 14px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .footer-inner { grid-template-columns: 1fr; }
  section { padding: 48px 0; }
  .hero { padding: 64px 0 56px; }
}