/* ============================================
   Design tokens
   ============================================ */
:root {
  --bg: #0a0a0f;
  --bg-elev: #11111a;
  --bg-elev-2: #1a1a27;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #f5f5fa;
  --text-muted: #a5a5b8;
  --text-dim: #6e6e80;

  --brand-1: #3b82f6;
  --brand-2: #8b5cf6;
  --brand-3: #ec4899;
  --gradient: linear-gradient(135deg, var(--brand-1) 0%, var(--brand-2) 50%, var(--brand-3) 100%);
  --gradient-soft: linear-gradient(135deg, rgba(59,130,246,0.18), rgba(139,92,246,0.18), rgba(236,72,153,0.18));

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 60px rgba(139, 92, 246, 0.25);

  --max-w: 1200px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;

  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

/* Ambient background glows */
body::before {
  content: "";
  position: fixed;
  inset: -20%;
  background:
    radial-gradient(600px circle at 15% 10%, rgba(59, 130, 246, 0.18), transparent 60%),
    radial-gradient(700px circle at 85% 30%, rgba(139, 92, 246, 0.15), transparent 60%),
    radial-gradient(500px circle at 60% 90%, rgba(236, 72, 153, 0.12), transparent 60%);
  z-index: -1;
  pointer-events: none;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4 { line-height: 1.15; font-weight: 700; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.4rem, 5vw + 1rem, 4.5rem); }
h2 { font-size: clamp(1.8rem, 2.5vw + 1rem, 2.8rem); }
h3 { font-size: 1.25rem; }
p  { color: var(--text-muted); }

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-pill);
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  margin-bottom: var(--space-3);
}

/* ============================================
   Layout
   ============================================ */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

.section {
  padding-block: var(--space-7);
}

.section-header {
  max-width: 720px;
  margin: 0 auto var(--space-6);
  text-align: center;
}
.section-header p { margin-top: var(--space-2); font-size: 1.05rem; }

main { position: relative; z-index: 1; }

/* ============================================
   Navigation
   ============================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  background: rgba(10, 10, 15, 0.72);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: 1rem;
}

.nav-logo { display: inline-flex; align-items: center; }
.nav-logo svg { height: 36px; width: auto; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a {
  padding: 0.6rem 0.95rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.nav-links a.active { color: var(--text); }
.nav-links a.active::after {
  content: "";
  display: block;
  height: 2px;
  margin-top: 4px;
  border-radius: 2px;
  background: var(--gradient);
}

.nav-cta { margin-left: var(--space-2); }

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  align-items: center;
  justify-content: center;
  color: var(--text);
}
.nav-toggle svg { width: 22px; height: 22px; }

@media (max-width: 860px) {
  .nav-links {
    position: fixed;
    inset: 72px 1rem auto 1rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 1rem;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
  }
  .nav-links.open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .nav-links a { padding: 0.9rem 1rem; }
  .nav-links .nav-cta { margin-left: 0; margin-top: 0.5rem; }
  .nav-toggle { display: inline-flex; }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.9rem 1.5rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: -0.01em;
  transition: transform 0.2s var(--ease), box-shadow 0.3s var(--ease), background 0.3s var(--ease), border-color 0.3s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }

.btn-primary {
  color: #fff;
  background: var(--gradient);
  background-size: 180% 180%;
  background-position: 0% 50%;
  box-shadow: 0 10px 30px rgba(139, 92, 246, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); background-position: 100% 50%; box-shadow: 0 14px 40px rgba(139,92,246,0.45); }

.btn-ghost {
  color: var(--text);
  border: 1px solid var(--border-strong);
  background: rgba(255,255,255,0.02);
}
.btn-ghost:hover { border-color: var(--brand-2); background: rgba(139,92,246,0.08); transform: translateY(-2px); }

.btn-sm { padding: 0.6rem 1.1rem; font-size: 0.88rem; }

/* ============================================
   Card
   ============================================ */
.card {
  position: relative;
  padding: var(--space-4);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: var(--gradient);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s var(--ease);
  pointer-events: none;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card:hover::before { opacity: 1; }

.card h3 { margin-bottom: 0.5rem; }
.card p  { font-size: 0.96rem; }

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  color: var(--text);
}
.card-icon svg { width: 24px; height: 24px; }

/* ============================================
   Footer
   ============================================ */
.footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-6) var(--space-4);
  margin-top: var(--space-6);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-5);
  margin-bottom: var(--space-5);
}
.footer-brand svg { height: 38px; width: auto; margin-bottom: var(--space-2); }
.footer-brand p { max-width: 32ch; font-size: 0.94rem; }
.footer h4 {
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
}
.footer-col ul { display: flex; flex-direction: column; gap: 0.55rem; }
.footer-col a { color: var(--text-muted); font-size: 0.95rem; transition: color 0.2s var(--ease); }
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  padding-top: var(--space-3);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  color: var(--text-dim);
  font-size: 0.88rem;
}
@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

/* ============================================
   Scroll reveal
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal.delay-1 { transition-delay: 0.08s; }
.reveal.delay-2 { transition-delay: 0.16s; }
.reveal.delay-3 { transition-delay: 0.24s; }