/* 85runtime — Design System */

:root {
  /* Light & airy (default) */
  --bg: #f7f7f4;
  --bg-elev: #ffffff;
  --bg-soft: #efeee9;
  --ink: #0a0a0a;
  --ink-2: #1a1a1a;
  --muted: #5e5e58;
  --line: rgba(10, 10, 10, 0.10);
  --line-soft: rgba(10, 10, 10, 0.06);
  --accent: #2347ff;       /* electric blue */
  --accent-ink: #ffffff;
  --accent-soft: rgba(35, 71, 255, 0.08);
  --grid: rgba(10, 10, 10, 0.05);
  --noise: 0.4;
}

[data-theme="dark"] {
  --bg: #0a0b0d;
  --bg-elev: #121316;
  --bg-soft: #16181c;
  --ink: #f4f4f1;
  --ink-2: #e2e2dd;
  --muted: #8a8a82;
  --line: rgba(244, 244, 241, 0.12);
  --line-soft: rgba(244, 244, 241, 0.06);
  --accent: #5b7bff;
  --accent-ink: #0a0b0d;
  --accent-soft: rgba(91, 123, 255, 0.14);
  --grid: rgba(244, 244, 241, 0.05);
}

[data-theme="editorial"] {
  --bg: #f3ede1;
  --bg-elev: #faf6ec;
  --bg-soft: #ebe3d2;
  --ink: #1a1410;
  --ink-2: #2a2218;
  --muted: #6b5e4a;
  --line: rgba(26, 20, 16, 0.14);
  --line-soft: rgba(26, 20, 16, 0.07);
  --accent: #b9482b;
  --accent-ink: #faf6ec;
  --accent-soft: rgba(185, 72, 43, 0.10);
  --grid: rgba(26, 20, 16, 0.06);
}

[data-theme="tech"] {
  --bg: #e9edf0;
  --bg-elev: #f6f8fa;
  --bg-soft: #dde3e8;
  --ink: #0c1116;
  --ink-2: #1c232a;
  --muted: #5a6470;
  --line: rgba(12, 17, 22, 0.12);
  --line-soft: rgba(12, 17, 22, 0.06);
  --accent: #00d27a;
  --accent-ink: #0c1116;
  --accent-soft: rgba(0, 210, 122, 0.12);
  --grid: rgba(12, 17, 22, 0.05);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: -0.01em;
  transition: background 0.4s ease, color 0.4s ease;
}

body {
  overflow-x: hidden;
}

::selection { background: var(--accent); color: var(--accent-ink); }

a { color: inherit; text-decoration: none; }

button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

.mono { font-family: 'JetBrains Mono', ui-monospace, monospace; letter-spacing: 0; }

/* === Layout === */
.container {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 32px;
}

@media (max-width: 720px) {
  .container { padding: 0 20px; }
}

.section {
  position: relative;
  padding: 120px 0;
  border-top: 1px solid var(--line);
}
.section.no-border { border-top: none; }
@media (max-width: 720px) {
  .section { padding: 72px 0; }
}

.eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: '';
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.02;
  color: var(--ink);
  text-wrap: balance;
}

h1.display {
  font-size: clamp(48px, 8vw, 128px);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 0.95;
}

h2.section-title {
  font-size: clamp(36px, 5vw, 72px);
  letter-spacing: -0.04em;
  line-height: 1;
}

h3 { font-size: clamp(22px, 2.4vw, 32px); letter-spacing: -0.03em; line-height: 1.05; }

p.lead {
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.45;
  color: var(--ink-2);
  text-wrap: pretty;
  max-width: 60ch;
}
p { color: var(--ink-2); text-wrap: pretty; }

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: all 0.25s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn .arr {
  display: inline-block;
  transition: transform 0.3s ease;
}
.btn:hover .arr { transform: translateX(4px); }

.btn-primary {
  background: var(--ink);
  color: var(--bg);
}
.btn-primary:hover { background: var(--accent); color: var(--accent-ink); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--ink); }

.btn-sm { padding: 10px 16px; font-size: 14px; }

/* === Logo === */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  letter-spacing: -0.04em;
  font-size: 22px;
  color: var(--ink);
}
.logo .num {
  font-weight: 700;
  font-size: 26px;
  letter-spacing: -0.06em;
  position: relative;
  display: inline-block;
}
.logo .num::after {
  content: '';
  position: absolute;
  right: -4px; bottom: 4px;
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 1px;
}
.logo .word {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 400;
  font-size: 17px;
  letter-spacing: -0.02em;
  color: var(--ink-2);
  margin-top: 2px;
}

/* === Nav === */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  background: color-mix(in oklab, var(--bg) 78%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s;
}
.nav.scrolled { border-bottom-color: var(--line); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  max-width: 1440px;
  margin: 0 auto;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  padding: 9px 16px;
  font-size: 14px;
  border-radius: 999px;
  color: var(--ink-2);
  transition: all 0.2s;
}
.nav-links a:hover, .nav-links a.active { background: var(--bg-soft); color: var(--ink); }
.nav-cta { display: flex; gap: 10px; }
@media (max-width: 880px) {
  .nav-links { display: none; }
}
@media (max-width: 600px) {
  .nav-cta .btn-ghost { display: none; }
  .nav-inner { padding: 14px 20px; }
}

/* === Marquee === */
.marquee {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  padding: 22px 0;
}
.marquee-track {
  display: flex;
  gap: 56px;
  white-space: nowrap;
  animation: marquee 40s linear infinite;
  width: max-content;
}
.marquee-item {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(28px, 4vw, 56px);
  font-weight: 500;
  letter-spacing: -0.04em;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 56px;
}
.marquee-item .dot {
  width: 10px; height: 10px;
  background: var(--accent);
  border-radius: 2px;
  display: inline-block;
  transform: rotate(45deg);
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* === Cards === */
.card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 32px;
  transition: all 0.3s;
}
.card:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
}

/* === Reveal === */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s cubic-bezier(.2,.7,.2,1), transform 0.9s cubic-bezier(.2,.7,.2,1);
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal.delay-1 { transition-delay: 0.08s; }
.reveal.delay-2 { transition-delay: 0.16s; }
.reveal.delay-3 { transition-delay: 0.24s; }
.reveal.delay-4 { transition-delay: 0.32s; }

/* === Footer === */
.footer {
  padding: 80px 0 40px;
  border-top: 1px solid var(--line);
  background: var(--bg);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 64px;
}
.footer-col h5 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 18px;
  font-weight: 400;
}
.footer-col a {
  display: block;
  padding: 6px 0;
  color: var(--ink-2);
  font-size: 15px;
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
}
@media (max-width: 720px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; align-items: flex-start; }
}

/* === Grid bg === */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

/* utility */
.row { display: flex; gap: 16px; flex-wrap: wrap; }
.center { display: flex; align-items: center; justify-content: center; }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--muted);
  background: var(--bg-elev);
}
.tag .dot { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; display: inline-block; animation: pulse 2s ease-in-out infinite; }
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}