/* Base */
:root {
  --bg: #080a0f;
  --surface: #0e1016;
  --surface-2: #141820;
  --accent: #00e5ff;
  --accent-dim: rgba(0, 229, 255, 0.12);
  --accent-glow: rgba(0, 229, 255, 0.25);
  --text: #e8edf5;
  --text-dim: #6b7a94;
  --text-muted: #3d4a5c;
  --border: rgba(0, 229, 255, 0.08);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 40px;
  background: rgba(8, 10, 15, 0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 1100px;
  margin: 0 auto;
}

.nav-logo {
  width: 32px;
  height: 32px;
  background: var(--accent);
  color: var(--bg);
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
}

.nav-name {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--text);
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 40px 100px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

#network-canvas {
  width: 100%;
  height: 100%;
  opacity: 0.35;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.hero-label {
  font-family: 'Syne', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 28px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.hero-title {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(52px, 8vw, 96px);
  line-height: 1.0;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 28px;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-dim);
  max-width: 560px;
  line-height: 1.7;
  font-weight: 300;
}

/* Features */
.features {
  padding: 100px 40px;
  background: var(--surface);
  position: relative;
}

.features::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.3;
}

.features-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  border-color: rgba(0, 229, 255, 0.25);
  box-shadow: 0 0 40px rgba(0, 229, 255, 0.06);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-dim);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-family: 'Syne', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 15px;
  color: var(--text-dim);
  line-height: 1.65;
  font-weight: 300;
}

/* Philosophy */
.philosophy {
  padding: 120px 40px;
}

.philosophy-inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.philosophy-label {
  font-family: 'Syne', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.philosophy-headline {
  font-family: 'Syne', sans-serif;
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-dim);
  margin-bottom: 24px;
}

.philosophy-headline.accent {
  color: var(--text);
}

.philosophy-divider {
  width: 48px;
  height: 1px;
  background: var(--accent);
  margin: 48px auto;
  opacity: 0.4;
}

/* Closing */
.closing {
  padding: 100px 40px 120px;
  text-align: center;
  position: relative;
}

.closing::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.2;
}

.closing-headline {
  font-family: 'Syne', sans-serif;
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 800;
  color: var(--text);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.closing-sub {
  font-size: 18px;
  color: var(--text-dim);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.7;
  font-weight: 300;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 40px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-logo {
  width: 36px;
  height: 36px;
  background: var(--accent);
  color: var(--bg);
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
}

.footer-name {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
}

.footer-tagline {
  font-size: 13px;
  color: var(--text-muted);
  margin-left: auto;
  font-family: 'Syne', sans-serif;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* Responsive */
@media (max-width: 768px) {
  .nav { padding: 16px 20px; }
  .hero { padding: 100px 20px 80px; }
  .hero-title { font-size: 42px; }
  .hero-sub { font-size: 16px; }
  .features { padding: 60px 20px; }
  .features-grid { grid-template-columns: 1fr; gap: 16px; }
  .feature-card { padding: 28px; }
  .philosophy { padding: 80px 20px; }
  .philosophy-headline { font-size: 26px; }
  .philosophy-divider { margin: 36px auto; }
  .closing { padding: 60px 20px 80px; }
  .closing-headline { font-size: 32px; }
  .footer { padding: 36px 20px; }
  .footer-inner { flex-wrap: wrap; }
  .footer-tagline { margin-left: 0; width: 100%; margin-top: 8px; }
}