/* Interval Training — landing */

:root {
  --bg: #0a0a0a;
  --bg-elevated: #141414;
  --text: #f5f5f5;
  --text-muted: #a3a3a3;
  --accent: #e2ff3b;
  --accent-dim: rgba(226, 255, 59, 0.12);
  --work: #ff2d55;
  --border: rgba(255, 255, 255, 0.1);
  --max: 1080px;
  --serif: Georgia, "Times New Roman", serif;
  --sans: "Segoe UI", system-ui, -apple-system, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body.landing {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  width: min(var(--max), calc(100% - 2rem));
  margin-inline: auto;
}

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.95);
  border-bottom: 1px solid var(--border);
}

.site-nav .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.brand img {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  flex-shrink: 0;
  box-shadow: 0 0 0 1px rgba(226, 255, 59, 0.35);
  background: #0a0a0a;
}

.brand:hover { text-decoration: none; opacity: 0.9; }

.nav-links {
  display: none;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.85rem;
  font-weight: 500;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active { color: var(--text); text-decoration: none; }

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: #0a0a0a;
  background: var(--accent);
  border-radius: 8px;
  text-decoration: none;
  box-shadow: 0 4px 24px rgba(226, 255, 59, 0.25);
}

.btn-primary:hover {
  text-decoration: none;
  filter: brightness(1.05);
}

.site-footer {
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-grid h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text);
  margin: 0 0 0.75rem;
}

.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 0.35rem; }
.footer-grid a { color: var(--text-muted); text-decoration: none; }
.footer-grid a:hover { color: var(--accent); text-decoration: none; }

.footer-copy {
  text-align: center;
  font-size: 0.8rem;
  color: #666;
}

@media (min-width: 640px) {
  .nav-links { display: flex; }
}

@media (min-width: 900px) {
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
}