/* vortex.openfp.net — site layout on top of the shared design kit.
 *
 * The design kit (design-kit/design-kit.css) owns the branded components:
 * hero grid + aurora, gradient text, cards, glow buttons, reveal, the
 * scroll-progress bar and cursor glow. This file owns the accent override
 * and the page layout (chrome, sections, grids, code panels) so the site is
 * self-contained and works offline.
 */

/* Vortex accent: violet -> cyan, a cosmic swirl in the design-kit family
 * (homotopic emerald, openfp blue, horizon orange). */
:root {
  --dk-300: #c4b5fd;
  --dk-400: #a78bfa;
  --dk-500: #8b5cf6;
  --dk-600: #7c3aed;
  --dk-500-rgb: 139, 92, 246;
  --dk-pop: #22d3ee;

  --bg: #020617;
  --panel: rgba(255, 255, 255, .05);
  --hair: rgba(255, 255, 255, .1);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --ink: #cbd5e1;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Open Sans', system-ui, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--dk-300); text-decoration: none; }
a:hover { color: var(--dk-400); }
.container { max-width: 72rem; margin: 0 auto; padding: 0 1.5rem; }
.font-display { font-family: 'Nexa', sans-serif; font-weight: 900; letter-spacing: .04em; }
.font-brand { font-family: 'Nexa', sans-serif; }
.accent { color: var(--dk-400); }

/* Chrome: sticky header + footer. */
header.chrome {
  position: sticky; top: 0; z-index: 50;
  background: rgba(2, 6, 23, .72);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hair);
}
.chrome .container { display: flex; align-items: center; justify-content: space-between; height: 4.25rem; }
.wordmark { font-family: 'Nexa', sans-serif; font-weight: 900; font-size: 1.35rem;
  letter-spacing: .06em; text-transform: uppercase; color: #fff; }
.wordmark .a { color: var(--dk-500); }
nav.links { display: flex; gap: 1.75rem; align-items: center; }
nav.links a { font-family: 'Nexa', sans-serif; font-weight: 700; font-size: .82rem;
  letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
nav.links a:hover { color: #fff; }
@media (max-width: 720px) { nav.links a.hideable { display: none; } }

/* Buttons. */
.btn, .ghost {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: 'Nexa', sans-serif; font-weight: 700; font-size: .82rem;
  letter-spacing: .08em; text-transform: uppercase;
  border-radius: .5rem; padding: .7rem 1.4rem; cursor: pointer;
}
.btn { background: var(--dk-500); color: #020617; border: 1px solid var(--dk-500); }
.ghost { background: transparent; color: var(--text); border: 1px solid var(--hair); }
.ghost:hover { border-color: var(--dk-500); color: #fff; }

/* Hero. */
.hero { min-height: 88vh; display: flex; align-items: center; }
.hero .container { width: 100%; padding-top: 4rem; padding-bottom: 4rem; }
.hero-split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 2.5rem; align-items: center; }
.hero-art { display: flex; justify-content: center; }
.hero-visual { position: relative; margin: 0 auto; width: 100%; max-width: 27rem;
  aspect-ratio: 1 / 1; display: flex; align-items: center; justify-content: center; }
.visual-glow { position: absolute; inset: 2.5rem; border-radius: 9999px;
  background: rgba(var(--dk-500-rgb), .18); filter: blur(60px); z-index: 0; }
.vortex-art { position: relative; z-index: 1; width: 100%; height: auto;
  filter: drop-shadow(0 0 40px rgba(var(--dk-500-rgb), .28)); }
@media (max-width: 900px) {
  .hero-split { grid-template-columns: 1fr; }
  .hero-art { order: -1; }
  .hero-visual { max-width: 20rem; }
}
.badge {
  display: inline-block; font-family: 'Nexa', sans-serif; font-weight: 700;
  font-size: .72rem; letter-spacing: .22em; text-transform: uppercase;
  color: var(--dk-300); border: 1px solid rgba(var(--dk-500-rgb), .4);
  background: rgba(var(--dk-500-rgb), .1); border-radius: 999px; padding: .3rem 1rem;
}
h1.display {
  font-size: clamp(2.6rem, 7vw, 5rem); line-height: 1.02; text-transform: uppercase;
  color: #fff; margin: 1.4rem 0 0;
}
.tagline { font-size: clamp(1.05rem, 2.2vw, 1.4rem); color: var(--ink);
  max-width: 46rem; margin: 1.4rem 0 0; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2rem; }

/* Sections. */
section.block { padding: 5rem 0; border-top: 1px solid var(--hair); }
section.block.alt { background: rgba(255, 255, 255, .015); }
.section-title { font-family: 'Nexa', sans-serif; font-weight: 900; text-transform: uppercase;
  font-size: clamp(1.6rem, 4vw, 2.4rem); color: #fff; margin: 0; letter-spacing: .03em; }
.rule { height: 4px; width: 5rem; border-radius: 2px; margin: 1rem 0 1.6rem;
  background: linear-gradient(90deg, var(--dk-500), var(--dk-300)); }
.lead { color: var(--ink); max-width: 48rem; font-size: 1.08rem; }

/* Card grid. */
.grid { display: grid; gap: 1.25rem; margin-top: 2.4rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.card { border: 1px solid var(--hair); background: var(--panel); border-radius: .9rem;
  padding: 1.5rem; }
.card h3 { font-family: 'Nexa', sans-serif; font-weight: 900; text-transform: uppercase;
  font-size: .95rem; letter-spacing: .04em; color: #fff; margin: 0 0 .5rem; }
.card p { margin: 0; color: var(--ink); font-size: .96rem; }
.card .k { font-family: 'Nexa', sans-serif; font-weight: 700; color: var(--dk-400);
  font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; display: block; margin-bottom: .6rem; }

/* Split layout: prose beside a code/terminal panel. */
.split { display: grid; gap: 2.2rem; margin-top: 2.4rem; align-items: start;
  grid-template-columns: 1fr 1fr; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }

/* Code + terminal panels. */
pre.code, .term {
  border: 1px solid var(--hair); background: #0b1120; border-radius: .75rem;
  padding: 1.15rem 1.3rem; overflow-x: auto; margin: 0;
  font-family: ui-monospace, 'JetBrains Mono', 'Fira Code', monospace;
  font-size: .86rem; line-height: 1.6; color: #dbe4f3;
}
pre.code .kw { color: var(--dk-300); }
pre.code .cm { color: #64748b; font-style: italic; }
pre.code .st { color: #7dd3fc; }
.term { background: #05070f; }
.term .prompt { color: var(--dk-400); }
.term .out { color: #a7f3d0; }
.term .said { color: var(--muted); }
.caption { color: var(--muted); font-size: .84rem; margin-top: .7rem; }

/* Footer. */
footer.chrome { border-top: 1px solid var(--hair); border-bottom: none;
  position: static; background: transparent; padding: 3rem 0; }
footer .container { display: flex; align-items: center; justify-content: space-between; height: auto; flex-wrap: wrap; gap: 1rem; }
footer .copy { color: var(--muted); font-size: .85rem; }

.reveal { will-change: opacity, transform; }