/**
 * Onyx AI Labs — Design System v4.1
 * Sharp, technical studio. Dark + Light modes. Dynamic geo background.
 */

/* ─── Fonts ──────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;600;700&family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

/* ─── Dark Mode (default) ────────────────────────────────────────── */
:root {
  --bg: #06060f;
  --bg-rgb: 6, 6, 15;
  --surface: #0c0c1a;
  --surface-raised: #12122a;
  --border: rgba(255, 255, 255, 0.07);
  --border-hover: rgba(255, 255, 255, 0.14);
  --text-primary: #f0f0f5;
  --text-body: #a8a8be;
  --text-secondary: #7a7a95;
  --text-muted: #505068;
  --accent: #00d4aa;
  --accent-rgb: 0, 212, 170;
  --accent-hover: #00eabb;
  --accent-dim: #009977;
  --accent-glow: rgba(0, 212, 170, 0.15);
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --font-body: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  color-scheme: dark;
}

/* ─── Light Mode ─────────────────────────────────────────────────── */
.light {
  --bg: #f5f5f8;
  --bg-rgb: 245, 245, 248;
  --surface: #ffffff;
  --surface-raised: #f0f0f5;
  --border: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);
  --text-primary: #0a0a14;
  --text-body: #3a3a50;
  --text-secondary: #5a5a72;
  --text-muted: #8888a0;
  --accent: #009977;
  --accent-rgb: 0, 153, 119;
  --accent-hover: #00b38a;
  --accent-dim: #007755;
  --accent-glow: rgba(0, 153, 119, 0.1);
  color-scheme: light;
}

/* ─── Base ───────────────────────────────────────────────────────── */
* { box-sizing: border-box; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.4s ease, color 0.4s ease;
}

/* ─── Typography ─────────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-body);
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.mono { font-family: var(--font-mono); }

.label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ─── Dynamic Geo Canvas ─────────────────────────────────────────── */
#geo-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* ─── Noise Texture ──────────────────────────────────────────────── */
.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

.light .noise { opacity: 0.015; }

/* ─── Cards ──────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  position: relative;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.card:hover {
  border-color: var(--border-hover);
  background: var(--surface-raised);
}

.card-accent:hover {
  border-color: rgba(var(--accent-rgb), 0.3);
}

/* ─── Service Card ───────────────────────────────────────────────── */
.service-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2rem;
  position: relative;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: var(--accent);
  transition: height 0.4s ease;
}

.service-card:hover {
  border-color: rgba(var(--accent-rgb), 0.2);
  background: var(--surface-raised);
}

.service-card:hover::before {
  height: 100%;
}

/* ─── Terminal Block ─────────────────────────────────────────────── */
.terminal {
  background: #0a0a16;
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  overflow: hidden;
}

.light .terminal {
  background: #f8f8fc;
  border-color: var(--border);
}

.terminal-bar {
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border);
  padding: 0.625rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.light .terminal-bar {
  background: rgba(0, 0, 0, 0.03);
}

.terminal-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
}

.light .terminal-dot {
  background: rgba(0, 0, 0, 0.1);
}

.terminal-body {
  padding: 1.25rem;
  min-height: 18rem;
}

.terminal-body .accent { color: var(--accent); }
.terminal-body .dim { color: var(--text-muted); }
.terminal-body .white { color: var(--text-primary); }
.terminal-body .muted { color: var(--text-secondary); }

/* ─── Proof Strip ────────────────────────────────────────────────── */
.proof-strip {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(var(--accent-rgb), 0.02);
}

/* ─── Divider ────────────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--border);
}

/* ─── Glow Accent ────────────────────────────────────────────────── */
.accent-glow {
  text-shadow: 0 0 40px rgba(var(--accent-rgb), 0.4);
}

.light .accent-glow {
  text-shadow: none;
}

/* ─── Button ─────────────────────────────────────────────────────── */
.btn-primary {
  background: var(--accent);
  color: #000;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.875rem 2rem;
  border: none;
  transition: background 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
  display: inline-block;
  text-decoration: none;
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 30px var(--accent-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text-body);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.875rem 2rem;
  border: 1px solid var(--border);
  transition: border-color 0.2s ease, color 0.2s ease;
  cursor: pointer;
  display: inline-block;
  text-decoration: none;
}

.btn-outline:hover {
  border-color: rgba(var(--accent-rgb), 0.4);
  color: var(--accent);
}

/* ─── Process Step ───────────────────────────────────────────────── */
.process-step {
  position: relative;
  padding-left: 3rem;
}

.process-step::before {
  content: attr(data-step);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(var(--accent-rgb), 0.3);
}

/* ─── Scroll Reveal ──────────────────────────────────────────────── */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Nav ────────────────────────────────────────────────────────── */
.nav-link {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color 0.2s ease;
  text-decoration: none;
}

.nav-link:hover {
  color: var(--text-primary);
}

/* ─── Nav Dropdown ───────────────────────────────────────────────── */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 200px;
  padding: 0.5rem 0;
  padding-top: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  z-index: 60;
}

/* Invisible bridge so mouse can travel from trigger to menu */
.nav-dropdown::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  height: 0.5rem;
}

.nav-dropdown:hover .nav-dropdown-menu {
  display: block;
}

.nav-dropdown-menu a {
  display: block;
  padding: 0.625rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s, background 0.2s;
}

.nav-dropdown-menu a:hover {
  color: var(--accent);
  background: var(--surface-raised);
}

/* ─── Theme Toggle ───────────────────────────────────────────────── */
.theme-toggle {
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon { display: none; }

.light .theme-toggle .icon-moon { display: block; }
.light .theme-toggle .icon-sun { display: none; }
:root:not(.light) .theme-toggle .icon-sun { display: block; }
:root:not(.light) .theme-toggle .icon-moon { display: none; }

/* Fix: apply to html element */
html:not(.light) .theme-toggle .icon-sun { display: block; }
html:not(.light) .theme-toggle .icon-moon { display: none; }
html.light .theme-toggle .icon-sun { display: none; }
html.light .theme-toggle .icon-moon { display: block; }

/* ─── Logo switching ─────────────────────────────────────────────── */
.logo-dark { display: block; }
.logo-light { display: none; }
.light .logo-dark { display: none; }
.light .logo-light { display: block; }

/* ─── Scan Line (subtle) ─────────────────────────────────────────── */
@keyframes scan {
  0% { top: -2px; }
  100% { top: 100%; }
}

.scanline {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(var(--accent-rgb), 0.08), transparent);
  pointer-events: none;
  animation: scan 8s linear infinite;
  opacity: 0.5;
}

.light .scanline { opacity: 0.3; }

/* ─── Reduced Motion ─────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .scanline, .noise { display: none !important; }
  #geo-canvas { display: none !important; }
}