:root {
  --bg: #0e1116;
  --bg-alt: #151a22;
  --panel: #ffffff;
  --ink: #16202c;
  --ink-soft: #55606d;
  --accent: #1f6feb;
  --accent-ink: #ffffff;
  --line: #e4e8ee;
  --radius: 14px;
  --maxw: 960px;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--panel);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 5vw, 3rem);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 0.6rem; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--ink);
  color: #fff;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}
.brand-name { font-weight: 600; letter-spacing: 0.01em; }

.site-nav { display: flex; gap: 1.5rem; }
.site-nav a { color: var(--ink-soft); font-size: 0.95rem; }
.site-nav a:hover { color: var(--ink); text-decoration: none; }

/* Hero */
.hero {
  background: radial-gradient(1200px 600px at 70% -10%, #1b2432, var(--bg));
  color: #eef2f7;
  padding: clamp(4rem, 12vw, 8rem) clamp(1rem, 5vw, 3rem);
}
.hero-inner { max-width: var(--maxw); margin: 0 auto; }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  color: #8aa0b8;
  margin: 0 0 0.75rem;
}
.hero h1 {
  margin: 0;
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}
.lede {
  max-width: 42ch;
  font-size: clamp(1.05rem, 2.5vw, 1.3rem);
  color: #b9c6d6;
  margin: 1.25rem 0 2rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.05s ease, opacity 0.15s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-ghost { border: 1px solid #35455a; color: #dbe4ef; }

/* Panels */
.panel { padding: clamp(3rem, 8vw, 5rem) clamp(1rem, 5vw, 3rem); }
.panel.alt { background: #f6f8fb; }
.panel-inner { max-width: var(--maxw); margin: 0 auto; }
.panel h2 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
}
.panel p { color: var(--ink-soft); max-width: 60ch; margin: 0.5rem 0; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.card h3 { margin: 0 0 0.5rem; font-size: 1.1rem; }
.card p { margin: 0; }

/* Footer */
.site-footer {
  padding: 2rem clamp(1rem, 5vw, 3rem);
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.9rem;
}
.site-footer p { max-width: var(--maxw); margin: 0 auto; }

@media (prefers-color-scheme: dark) {
  body { background: var(--bg); color: #e7edf4; }
  .site-header { background: rgba(14, 17, 22, 0.8); border-bottom-color: #222b36; }
  .brand { color: #e7edf4; }
  .site-nav a { color: #9fb0c2; }
  .site-nav a:hover { color: #fff; }
  .panel.alt { background: var(--bg-alt); }
  .panel p { color: #a9b6c4; }
  .card { background: var(--bg-alt); border-color: #222b36; }
  .site-footer { border-top-color: #222b36; color: #8a97a6; }
}