/* TechChase - Premium Enterprise AI Landing
   Design tokens + global styles */

:root {
  --ink-0: oklch(0.11 0.012 240);
  --ink-1: oklch(0.14 0.014 240);
  --ink-2: oklch(0.17 0.014 240);
  --ink-3: oklch(0.22 0.014 240);
  --line: oklch(0.30 0.014 240 / 0.55);
  --line-soft: oklch(0.30 0.014 240 / 0.28);
  --text: oklch(0.97 0.005 240);
  --text-2: oklch(0.78 0.006 240);
  --text-3: oklch(0.58 0.008 240);
  --cyan: oklch(0.83 0.14 200);
  --cyan-deep: oklch(0.68 0.16 210);
  --cyan-soft: oklch(0.83 0.14 200 / 0.18);
  --violet: oklch(0.72 0.10 280);
  --warn: oklch(0.82 0.12 80);
  --good: oklch(0.80 0.14 155);

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 28px;

  --shadow-soft: 0 1px 0 oklch(1 0 0 / 0.04) inset, 0 24px 60px -28px oklch(0 0 0 / 0.6);
  --shadow-glow: 0 0 0 1px oklch(0.83 0.14 200 / 0.25), 0 30px 80px -40px oklch(0.83 0.14 200 / 0.35);

  --max: 1280px;
  --gutter: clamp(20px, 4vw, 56px);

  --font-display: "Geist", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { background: var(--ink-0); color-scheme: dark; }
body {
  font-family: var(--font-display);
  font-feature-settings: "ss01", "cv11", "ss03";
  color: var(--text);
  background:
    radial-gradient(1200px 700px at 70% -10%, oklch(0.83 0.14 200 / 0.10), transparent 60%),
    radial-gradient(900px 600px at 10% 110%, oklch(0.72 0.10 280 / 0.07), transparent 55%),
    var(--ink-0);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  line-height: 1.45;
  letter-spacing: -0.01em;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img, svg { display: block; max-width: 100%; }

::selection { background: var(--cyan-soft); color: var(--text); }

/* ---- Layout ---- */
.container {
  max-width: var(--max);
  margin: 0 auto;
  padding-inline: var(--gutter);
}
.section { padding-block: clamp(72px, 9vw, 140px); position: relative; }
.section + .section { border-top: 1px solid var(--line-soft); }

/* ---- Type ---- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-3);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
}
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.02;
  margin: 0;
}
h1 { font-size: clamp(44px, 7vw, 96px); font-weight: 480; }
h2 { font-size: clamp(32px, 4.4vw, 56px); font-weight: 480; }
h3 { font-size: clamp(20px, 1.6vw, 26px); font-weight: 500; letter-spacing: -0.018em; }
p  { color: var(--text-2); font-size: clamp(15px, 1vw, 17px); line-height: 1.55; max-width: 62ch; text-wrap: pretty; }
.kbd, .mono { font-family: var(--font-mono); letter-spacing: 0; }

.glow-word {
  background: linear-gradient(180deg, var(--text), oklch(0.92 0.02 200));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 28px oklch(0.83 0.14 200 / 0.18);
}

/* ---- Buttons ---- */
.btn {
  --bg: var(--ink-2);
  --bd: var(--line);
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--bd);
  color: var(--text);
  font-size: 14px;
  letter-spacing: -0.01em;
  transition: transform .25s ease, background .3s ease, border-color .3s ease;
  will-change: transform;
  isolation: isolate;
}
.btn:hover { transform: translateY(-1px); }
.btn .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); }
.btn--primary {
  --bg: linear-gradient(180deg, oklch(0.86 0.14 200), oklch(0.66 0.16 210));
  --bd: oklch(0.86 0.14 200 / 0.4);
  color: oklch(0.12 0.02 240);
  font-weight: 600;
  box-shadow: 0 18px 40px -16px oklch(0.83 0.14 200 / 0.55), inset 0 1px 0 oklch(1 0 0 / 0.4);
}
.btn--primary::after {
  content: "";
  position: absolute; inset: -1px;
  border-radius: inherit;
  background: radial-gradient(120px 60px at var(--mx, 50%) var(--my, 50%), oklch(1 0 0 / 0.35), transparent 60%);
  mix-blend-mode: overlay;
  pointer-events: none;
  opacity: 0; transition: opacity .3s ease;
}
.btn--primary:hover::after { opacity: 1; }

.btn--ghost { background: transparent; border-color: var(--line); }
.btn--ghost:hover { border-color: oklch(0.83 0.14 200 / 0.6); background: oklch(0.83 0.14 200 / 0.05); }

.btn .arrow { display: inline-flex; transition: transform .3s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---- Card ---- */
.card {
  position: relative;
  border-radius: var(--r-lg);
  background:
    linear-gradient(180deg, oklch(1 0 0 / 0.025), oklch(1 0 0 / 0)),
    var(--ink-1);
  border: 1px solid var(--line-soft);
  overflow: hidden;
  isolation: isolate;
  transition: transform .35s ease, border-color .35s ease, background .35s ease;
}
.card::before {
  content: "";
  position: absolute; inset: 0; border-radius: inherit;
  padding: 1px;
  background: conic-gradient(from var(--ang, 0deg), transparent 0deg, oklch(0.83 0.14 200 / 0.55) 60deg, transparent 120deg, transparent 360deg);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: 0;
  transition: opacity .4s ease;
  pointer-events: none;
}
.card:hover { transform: translateY(-3px); border-color: oklch(0.83 0.14 200 / 0.25); }
.card:hover::before { opacity: 1; animation: trace 4s linear infinite; }
@keyframes trace { to { --ang: 360deg; } }
@property --ang { syntax: '<angle>'; inherits: false; initial-value: 0deg; }

/* ---- Glass panel ---- */
.glass {
  background: linear-gradient(180deg, oklch(1 0 0 / 0.035), oklch(1 0 0 / 0.01));
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
}

/* ---- Hairline grid background ---- */
.grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(oklch(0.30 0.014 240 / 0.22) 1px, transparent 1px),
    linear-gradient(90deg, oklch(0.30 0.014 240 / 0.22) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(80% 80% at 50% 35%, black, transparent 85%);
  pointer-events: none;
}

/* ---- Light sweep divider ---- */
.sweep {
  height: 1px;
  background: linear-gradient(90deg, transparent, oklch(0.83 0.14 200 / 0.7), transparent);
  position: relative;
  overflow: hidden;
}
.sweep::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, oklch(1 0 0 / 0.6), transparent);
  transform: translateX(-100%);
  animation: sweep 6s ease-in-out infinite;
}
@keyframes sweep { 0%,15% { transform: translateX(-100%); } 60%,100% { transform: translateX(100%); } }

/* ---- Tickers ---- */
.scroll-mask {
  -webkit-mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
          mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
}

/* ---- Reveal ---- */
.reveal { opacity: 0; transform: translateY(14px); }
.reveal.in { opacity: 1; transform: none; }

/* ---- Nav ---- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  background: oklch(0.11 0.012 240 / 0.6);
  border-bottom: 1px solid var(--line-soft);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a {
  font-size: 13.5px; color: var(--text-2); transition: color .2s ease;
}
.nav-links a:hover { color: var(--text); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -0.02em; }
.brand-mark {
  width: 26px; height: 26px; border-radius: 7px;
  background: conic-gradient(from 200deg, oklch(0.83 0.14 200), oklch(0.66 0.16 210), oklch(0.83 0.14 200));
  position: relative; box-shadow: 0 0 0 1px oklch(0.83 0.14 200 / 0.4), 0 0 20px oklch(0.83 0.14 200 / 0.4);
}
.brand-mark::after {
  content: ""; position: absolute; inset: 5px; border-radius: 4px;
  background: var(--ink-0); box-shadow: inset 0 0 0 1px oklch(0.83 0.14 200 / 0.6);
}

/* ---- Pill / chip ---- */
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 999px;
  background: oklch(0.83 0.14 200 / 0.08);
  border: 1px solid oklch(0.83 0.14 200 / 0.25);
  color: oklch(0.92 0.06 200);
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
}
.chip .pulse {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 0 0 var(--cyan);
  animation: pulse 2.4s ease-out infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 oklch(0.83 0.14 200 / 0.6); }
  100% { box-shadow: 0 0 0 12px oklch(0.83 0.14 200 / 0); }
}

/* ---- Numbers / stats ---- */
.stat-num {
  font-family: var(--font-display);
  font-weight: 480;
  font-size: clamp(40px, 5vw, 64px);
  letter-spacing: -0.03em;
  line-height: 1;
  background: linear-gradient(180deg, var(--text), oklch(0.7 0.05 200));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---- Mobile sticky CTA ---- */
.sticky-cta {
  position: fixed; bottom: 14px; left: 14px; right: 14px;
  z-index: 60;
  display: none;
}
@media (max-width: 720px) {
  .sticky-cta { display: flex; }
  .nav-links { display: none; }
  .section { padding-block: 64px; }
}

/* ---- Scan lines (very subtle, ambient) ---- */
.scanlines {
  position: absolute; inset: 0;
  background: repeating-linear-gradient(0deg, transparent 0 3px, oklch(1 0 0 / 0.015) 3px 4px);
  mix-blend-mode: overlay;
  pointer-events: none;
  opacity: .6;
}

/* ---- Tag list ---- */
.tag {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.08em;
  padding: 4px 8px; border-radius: 6px;
  background: oklch(1 0 0 / 0.04);
  border: 1px solid var(--line-soft);
  color: var(--text-2);
  text-transform: uppercase;
}

/* ---- Holographic flicker ---- */
body.flicker { filter: hue-rotate(-4deg) brightness(1.06) contrast(1.03); }
body.flicker::after {
  content: "";
  position: fixed; inset: 0; pointer-events: none; z-index: 9999;
  background: linear-gradient(0deg, transparent 49%, oklch(0.83 0.14 200 / 0.07) 50%, transparent 51%);
  background-size: 100% 6px;
}

/* ---- Accessibility ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

/* ---- Utility ---- */
.row { display: flex; }
.col { display: flex; flex-direction: column; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.gap-8 { gap: 32px; }
.center { align-items: center; }
.between { justify-content: space-between; }
.muted { color: var(--text-3); }
.hide-mobile { }
@media (max-width: 760px) { .hide-mobile { display: none !important; } }