/* ============================================================
   GT DASH — Landing Page
   Design tokens + base styles
============================================================ */

:root {
  /* Colors — dark by default */
  --bg: #06080F;
  --bg-elev: #0B0F1A;
  --bg-elev-2: #0F1524;
  --surface: rgba(255, 255, 255, 0.03);
  --surface-2: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #F5F7FB;
  --text-2: #A8B0C2;
  --text-3: #6B7388;
  --text-4: #4A5166;

  /* Primary — blue (tweakable) */
  --primary: #3B82F6;
  --primary-2: #60A5FA;
  --primary-glow: rgba(59, 130, 246, 0.45);
  --primary-soft: rgba(59, 130, 246, 0.12);

  /* Semantic */
  --success: #22C55E;
  --danger: #EF4444;

  /* Glass */
  --glass-blur: 28px;
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-bg-strong: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.10);
  --glass-highlight: rgba(255, 255, 255, 0.20);

  /* Radii */
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --r-2xl: 36px;
  --r-pill: 999px;

  /* Type */
  --font-display: "Inter Tight", "Inter", -apple-system, sans-serif;
  --font-body: "Inter", -apple-system, sans-serif;

  /* Layout */
  --container: 1200px;
  --container-wide: 1280px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* Light theme override */
[data-theme="light"] {
  --bg: #F6F7FA;
  --bg-elev: #FFFFFF;
  --bg-elev-2: #FFFFFF;
  --surface: rgba(15, 21, 36, 0.03);
  --surface-2: rgba(15, 21, 36, 0.05);
  --border: rgba(15, 21, 36, 0.08);
  --border-strong: rgba(15, 21, 36, 0.14);
  --text: #0B0F1A;
  --text-2: #47506A;
  --text-3: #6B7388;
  --text-4: #98A0B3;
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-bg-strong: rgba(255, 255, 255, 0.70);
  --glass-border: rgba(15, 21, 36, 0.10);
  --glass-highlight: rgba(255, 255, 255, 0.90);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
  overflow-x: hidden;
  font-feature-settings: "ss01", "cv11";
}
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, h5, h6, p { margin: 0; }

/* ---------- Typography ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.02;
  text-wrap: balance;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-2);
  padding: 6px 12px;
  border-radius: var(--r-pill);
  background: var(--surface);
  border: 1px solid var(--border);
}
.eyebrow .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 10px var(--primary-glow);
}

/* ---------- Layout ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.container-wide {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px;
}
section {
  position: relative;
  padding: 120px 0;
}
@media (max-width: 768px) {
  section { padding: 72px 0; }
}

/* ---------- Glass primitive ---------- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  position: relative;
  overflow: hidden;
}
.glass::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(
    135deg,
    var(--glass-highlight) 0%,
    transparent 30%,
    transparent 70%,
    rgba(255, 255, 255, 0.06) 100%
  );
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
  opacity: var(--glass-intensity, 1);
}
.glass-strong {
  background: var(--glass-bg-strong);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 22px;
  border-radius: var(--r-pill);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: all 0.2s var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.12) inset,
    0 10px 30px -8px var(--primary-glow),
    0 2px 0 rgba(0,0,0,0.1) inset,
    0 -1px 0 rgba(0,0,0,0.15) inset;
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.25), transparent 50%);
  opacity: 0.8;
  pointer-events: none;
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.18) inset,
    0 18px 40px -10px var(--primary-glow),
    0 2px 0 rgba(0,0,0,0.1) inset;
}
.btn-ghost {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-ghost:hover {
  background: var(--surface-2);
  border-color: var(--border-strong);
}
.btn-glass {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  color: var(--text);
}
.btn-glass:hover {
  border-color: var(--border-strong);
}
.btn-lg {
  height: 56px;
  padding: 0 28px;
  font-size: 16px;
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* ---------- Ambient gradients ---------- */
.ambient {
  position: absolute;
  pointer-events: none;
  filter: blur(80px);
  opacity: 0.6;
  z-index: 0;
}
[data-theme="light"] .ambient {
  opacity: 0.35;
}
.ambient-primary {
  background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
}
.ambient-violet {
  background: radial-gradient(circle, #8B5CF6 0%, transparent 70%);
}

/* ---------- Custom scrollbar ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 999px;
  opacity: 0.8;
}
::-webkit-scrollbar-thumb:hover { background: var(--primary-2); }
html { scrollbar-color: var(--primary) transparent; scrollbar-width: thin; }

/* ---------- Grid bg ---------- */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at 50% 0%, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, black 0%, transparent 70%);
  opacity: 0.5;
  pointer-events: none;
}