/* ==========================================================================
   base.css — design tokens, reset, typography, layout primitives
   ========================================================================== */

:root {
  --bg: #07070b;
  --surface: #0f0f17;
  --surface-2: #161622;
  --line: rgba(255, 255, 255, 0.08);
  --text: #f4f4f8;
  --muted: #9a9ab0;

  --violet: #7c3aed;
  --pink: #ec4899;
  --amber: #f59e0b;
  --cyan: #22d3ee;
  --grad: linear-gradient(120deg, var(--violet) 0%, var(--pink) 50%, var(--amber) 100%);
  --grad-cool: linear-gradient(120deg, var(--cyan), var(--violet));

  --font-display: "Syne", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  --radius: 20px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --container: 1240px;
  --gutter: clamp(20px, 4vw, 48px);
  --nav-h: 76px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1rem/1.65 var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
::selection { background: var(--pink); color: #fff; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 6px; }

.skip-link {
  position: fixed; left: 16px; top: -60px; z-index: 1000;
  background: #fff; color: #000; padding: 10px 16px; border-radius: 8px;
  transition: top 0.2s;
}
.skip-link:focus { top: 16px; }

/* Typography ------------------------------------------------------------ */
.display, .h2, h1, h2, h3, .logo__text {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  line-height: 1.02;
}
.display { font-size: clamp(2.6rem, 7.5vw, 6rem); font-weight: 800; }
.h2 { font-size: clamp(2rem, 4.6vw, 3.4rem); font-weight: 700; line-height: 1.08; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 20px;
}
.grad {
  background: var(--grad);
  background-size: 200% 100%;
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  animation: gradShift 8s linear infinite;
}
@keyframes gradShift { to { background-position: 200% 0; } }

/* Layout ------------------------------------------------------------------ */
.container { width: 100%; max-width: calc(var(--container) + var(--gutter) * 2); margin-inline: auto; padding-inline: var(--gutter); }
.container--narrow { max-width: calc(900px + var(--gutter) * 2); }
.section { padding-block: clamp(72px, 11vw, 150px); position: relative; }
.section--flush { padding-top: 0; }
.section--tint { background: linear-gradient(180deg, transparent, rgba(124, 58, 237, 0.06) 40%, transparent); }
.section__head {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 24px;
  margin-bottom: clamp(36px, 6vw, 72px); flex-wrap: wrap;
}

/* Ambient decoration -------------------------------------------------------- */
.grain {
  position: fixed; inset: 0; z-index: 900; pointer-events: none; opacity: 0.06;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 100%; z-index: 1100;
  background: var(--grad); transform-origin: 0 50%; transform: scaleX(0);
}
.blob {
  position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.55; will-change: transform;
}
.blob--1 { background: var(--violet); }
.blob--2 { background: var(--pink); }
.blob--3 { background: var(--cyan); opacity: 0.4; }

/* Reveal-on-scroll (only when JS is on, so content never gets stuck hidden) --- */
.js [data-reveal] {
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
  transition-delay: var(--delay, 0ms);
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}