/* NeuralForge — Dark theme, professional, Stripe/Linear energy */

:root {
  --bg: #0a0a0f;
  --bg-card: #111118;
  --bg-card-hover: #16161e;
  --border: #1e1e2a;
  --border-hover: #2a2a3a;
  --text-primary: #f0f0f5;
  --text-secondary: #8888a0;
  --text-muted: #555566;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --radius: 8px;
  --radius-lg: 12px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ── NAV ── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  z-index: 100;
}

.nav-logo {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.nav-email {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color 0.15s;
}
.nav-email:hover { color: var(--text-primary); }

/* ── HERO ── */
.hero {
  max-width: 860px;
  margin: 0 auto;
  padding: 7rem 2rem 5rem;
  text-align: center;
}

.hero-headline {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

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

.hero-subheadline {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

.hero-actions {
  display: flex;
  gap: 0.875rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius);
  transition: background 0.15s, transform 0.1s;
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: transparent;
  color: var(--text-primary);
  font-size: 0.9375rem;
  font-weight: 500;
  border: 1px solid var(--border-hover);
  border-radius: var(--radius);
  transition: border-color 0.15s, background 0.15s;
}
.btn-secondary:hover { border-color: var(--text-muted); background: var(--bg-card); }

/* ── DIVIDER ── */
.section-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ── SERVICES ── */
.section {
  padding: 5rem 2rem;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.section-sub {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 480px;
  line-height: 1.65;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 3rem;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color 0.2s, background 0.2s;
}
.service-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.service-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background: var(--accent-glow);
  border: 1px solid rgba(99, 102, 241, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.service-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.service-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.service-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── WHY ── */
.why-section {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2.5rem;
  margin-top: 3rem;
}

.why-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.why-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.why-body {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── TRUST ── */
.trust-section {
  padding: 4rem 2rem;
  text-align: center;
}

.trust-tagline {
  font-size: 0.875rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 500;
}

/* ── FOOTER ── */
.footer {
  padding: 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-text {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-text a {
  color: var(--text-secondary);
  transition: color 0.15s;
}
.footer-text a:hover { color: var(--text-primary); }

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  .hero { padding: 5rem 1.5rem 3.5rem; }
  .section { padding: 3.5rem 1.5rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .services-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; gap: 1.75rem; }
}