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

:root {
  --color-bg: #0a0a0a;
  --color-surface: #141414;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-text: #f0f0f0;
  --color-muted: #a0a0a0;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--color-bg); color: var(--color-text); line-height: 1.6; }

/* NAV */
.nav { display: flex; justify-content: space-between; align-items: center; padding: 1.5rem 4rem; position: absolute; top: 0; left: 0; right: 0; z-index: 10; }
.nav-brand { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.02em; }
.nav-links { list-style: none; display: flex; gap: 2rem; align-items: center; }
.nav-links a { color: var(--color-muted); text-decoration: none; font-size: 0.9rem; transition: color 0.2s; }
.nav-links a:hover { color: var(--color-text); }

/* HERO */
.hero { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 2rem; background: radial-gradient(ellipse at 50% 0%, rgba(59,130,246,0.15) 0%, transparent 60%), var(--color-bg); }
.hero-content { max-width: 720px; }
.hero-title { font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.1; margin-bottom: 1.25rem; }
.hero-subtitle { font-size: 1.15rem; color: var(--color-muted); max-width: 540px; margin: 0 auto 2.5rem; }
.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* BUTTONS */
.btn { display: inline-block; padding: 0.75rem 1.75rem; border-radius: 8px; font-size: 0.95rem; font-weight: 600; text-decoration: none; transition: all 0.2s; cursor: pointer; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); }
.btn-outline { border: 1px solid rgba(255,255,255,0.15); color: var(--color-text); background: transparent; }
.btn-outline:hover { border-color: rgba(255,255,255,0.3); background: rgba(255,255,255,0.05); }
.btn-sm { padding: 0.5rem 1.25rem; font-size: 0.85rem; }

/* FEATURES */
.features { padding: 6rem 2rem; }
.container { max-width: 1080px; margin: 0 auto; }
.section-title { text-align: center; font-size: 2rem; font-weight: 700; margin-bottom: 3rem; letter-spacing: -0.02em; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.feature-card { background: var(--color-surface); border: 1px solid rgba(255,255,255,0.06); border-radius: 12px; padding: 2rem; transition: border-color 0.2s; }
.feature-card:hover { border-color: rgba(59,130,246,0.3); }
.feature-icon { font-size: 1.75rem; margin-bottom: 1rem; }
.feature-card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.feature-card p { color: var(--color-muted); font-size: 0.95rem; }

/* FOOTER */
.footer { text-align: center; padding: 3rem 2rem; color: var(--color-muted); font-size: 0.85rem; border-top: 1px solid rgba(255,255,255,0.06); }

/* MOBILE */
@media (max-width: 640px) {
  .nav { padding: 1rem 1.5rem; }
  .nav-links { gap: 1rem; }
  .hero { padding: 6rem 1.5rem 3rem; }
}