/* Core Reset */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; color: #e5e7eb; background: #0b1220; }

/* CSS Variables */
:root {
  --brand: #22d3ee; /* cyan-400 */
  --brand-dark: #06b6d4; /* cyan-500 */
  --ink: #e5e7eb; /* slate-200 */
  --muted: #94a3b8; /* slate-400 */
  --bg: #0b1220; /* deep navy */
  --bg-alt: #0f172a; /* slate-900 */
  --panel: #111827; /* gray-900 */
  --panel-soft: #0f1a2b; /* custom */
  --border: #1f2a44; /* soft indigo border */
  --accent: #22c55e; /* green-500 */
}

/* Layout */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
header { position: sticky; top: 0; z-index: 50; background: rgba(10, 16, 28, 0.7); backdrop-filter: saturate(180%) blur(8px); border-bottom: 1px solid var(--border); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: 0.2px; color: var(--ink); text-decoration: none; }
.brand img { height: 36px; width: 36px; object-fit: contain; }
.nav a { color: var(--ink); text-decoration: none; font-weight: 600; margin-left: 18px; }
.nav a:hover { color: var(--brand-dark); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 18px; border-radius: 12px; font-weight: 700; text-decoration: none; border: 1px solid transparent; transition: transform 120ms ease, background 120ms ease, color 120ms ease, border-color 120ms ease; }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--brand); color: white; }
.btn.primary:hover { background: var(--brand-dark); }
.btn.secondary { background: transparent; border-color: var(--border); color: var(--ink); }
.btn.secondary:hover { border-color: var(--brand); color: var(--brand-dark); }

/* Hero */
.hero { position: relative; min-height: calc(100vh - 64px); display: grid; align-items: center; background:
  radial-gradient(1200px 600px at 10% -10%, rgba(34, 211, 238, 0.15), transparent 60%),
  radial-gradient(1000px 500px at 110% 10%, rgba(99, 102, 241, 0.12), transparent 60%),
  linear-gradient(180deg, #0b1220 0%, #0f172a 100%);
  overflow: hidden; }
.hero .content { padding: 64px 0; }
.kicker { text-transform: uppercase; letter-spacing: 1.5px; color: var(--brand); font-weight: 800; font-size: 12px; }
.headline { font-size: clamp(36px, 6vw, 64px); line-height: 1.05; margin: 10px 0 12px; font-weight: 900; }
.subhead { font-size: clamp(16px, 2.5vw, 22px); color: var(--muted); margin-bottom: 24px; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

/* Decorative orbs */
.orbs { position: absolute; inset: 0; pointer-events: none; }
.orb { position: absolute; filter: blur(24px); opacity: 0.5; mix-blend-mode: screen; border-radius: 9999px; }
.orb.cyan { background: radial-gradient(circle, rgba(34,211,238,0.6), rgba(34,211,238,0) 70%); }
.orb.violet { background: radial-gradient(circle, rgba(139,92,246,0.5), rgba(139,92,246,0) 70%); }
.float-slow { animation: float 10s ease-in-out infinite; }
.float-med { animation: float 14s ease-in-out infinite; }
@keyframes float { 0% { transform: translateY(0px) } 50% { transform: translateY(-16px) } 100% { transform: translateY(0px) } }

/* What We Do */
.section { padding: 72px 0; }
.section.alt { background: var(--bg-alt); }
.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
.card { border: 1px solid var(--border); border-radius: 16px; padding: 24px; background: var(--panel); height: 100%; box-shadow: 0 10px 30px rgba(0,0,0,0.25); }
.card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(0,0,0,0.35); transition: transform 180ms ease, box-shadow 180ms ease; }
.card h3 { margin-top: 8px; margin-bottom: 8px; font-size: 22px; }
.card p { color: var(--muted); margin-top: 4px; }
.card a { margin-top: 12px; display: inline-flex; align-items: center; gap: 8px; color: var(--brand-dark); font-weight: 700; text-decoration: none; }
.card a:hover { text-decoration: underline; }
.icon { height: 40px; width: 40px; display: inline-flex; align-items: center; justify-content: center; border-radius: 10px; background: rgba(34,211,238,0.12); color: var(--brand); font-weight: 900; }

/* Featured Project */
.feature { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; align-items: center; }
.feature img { width: 100%; border-radius: 16px; border: 1px solid var(--border); background: var(--panel); }
.feature ul { margin: 12px 0 0; padding-left: 18px; color: var(--muted); }
.feature li { margin: 6px 0; }

/* Philosophy */
.philosophy { background: linear-gradient(135deg, #0f172a, #111827); color: #e2e8f0; border-top: 1px solid #1f2937; border-bottom: 1px solid #1f2937; }
.philosophy .headline { color: #e2e8f0; }
.philosophy p { color: #cbd5e1; }

/* Footer */
footer { padding: 32px 0; border-top: 1px solid var(--border); color: var(--muted); font-size: 14px; }

/* Utilities */
.muted { color: var(--muted); }
.center { text-align: center; }
.stack-s { display: grid; gap: 8px; }
.stack-m { display: grid; gap: 16px; }
.stack-l { display: grid; gap: 24px; }

/* Reveal Animations */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 600ms ease, transform 600ms ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal.delay-1 { transition-delay: 120ms; }
.reveal.delay-2 { transition-delay: 240ms; }
.reveal.delay-3 { transition-delay: 360ms; }

/* Responsive */
@media (max-width: 900px) {
  .split, .feature { grid-template-columns: 1fr; }
  .hero { min-height: unset; }
}