:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #ec4899;
  --accent: #06b6d4;
  --success: #22c55e;
  --warning: #f59e0b;
  --dark: #0f172a;
  --dark-light: #1e293b;
  --dark-card: #1a2332;
  --gray: #64748b;
  --gray-light: #94a3b8;
  --white: #ffffff;
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  --gradient-card: linear-gradient(145deg, rgba(30, 41, 59, 0.9) 0%, rgba(15, 23, 42, 0.9) 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.02) 100%);
  --border-glass: 1px solid rgba(255, 255, 255, 0.12);
  --shadow-medium: 0 10px 25px -5px rgba(0, 0, 0, 0.35);
  --shadow-large: 0 25px 50px -12px rgba(0, 0, 0, 0.55);
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-medium: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--dark);
  color: var(--white);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

:focus-visible {
  outline: 3px solid rgba(99, 102, 241, 0.6);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 2000;
  padding: 0.75rem 1rem;
  border-radius: 14px;
  background: rgba(15, 23, 42, 0.95);
  border: var(--border-glass);
  color: var(--white);
  box-shadow: var(--shadow-large);
  transform: translateY(-150%);
  transition: var(--transition-medium);
}

.skip-link:focus {
  transform: translateY(0);
}

/* Background */
.bg-animation {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.bg-gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  animation: orbFloat 18s ease-in-out infinite;
}

.bg-gradient-orb.orb-1 {
  width: 540px;
  height: 540px;
  background: var(--primary);
  top: -220px;
  left: -220px;
}

.bg-gradient-orb.orb-2 {
  width: 520px;
  height: 520px;
  background: var(--secondary);
  bottom: -240px;
  right: -220px;
  animation-delay: -8s;
}

.bg-gradient-orb.orb-3 {
  width: 420px;
  height: 420px;
  background: var(--accent);
  top: 40%;
  left: 55%;
  animation-delay: -14s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(40px, -20px) scale(1.08); }
  50% { transform: translate(-25px, 35px) scale(0.92); }
  75% { transform: translate(30px, 25px) scale(1.04); }
}

.noise-overlay {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox=\"0 0 512 512\" xmlns=\"http://www.w3.org/2000/svg\"%3E%3Cfilter id=\"noiseFilter\"%3E%3CfeTurbulence type=\"fractalNoise\" baseFrequency=\"0.9\" numOctaves=\"4\" stitchTiles=\"stitch\"/%3E%3C/filter%3E%3Crect width=\"100%25\" height=\"100%25\" filter=\"url(%23noiseFilter)\"/%3E%3C/svg%3E");
}

.grid-pattern {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

/* Topbar */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 1.25rem;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(18px);
  border-bottom: var(--border-glass);
}

.topbar-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--white);
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: var(--gradient-primary);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  box-shadow: 0 0 40px rgba(99, 102, 241, 0.35);
}

.logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.35rem;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: var(--transition-medium);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--white);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(99, 102, 241, 0.35);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--white);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.22);
  transform: translateY(-1px);
}

/* Page layout */
.page {
  position: relative;
  z-index: 2;
  max-width: 1100px;
  margin: 0 auto;
  padding: 7.5rem 1.25rem 4.5rem;
}

.content-card {
  background: var(--gradient-card);
  backdrop-filter: blur(20px);
  border: var(--border-glass);
  border-radius: 24px;
  padding: 2.5rem;
  box-shadow: var(--shadow-large);
}

.content-header h1 {
  margin: 0 0 0.4rem;
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.muted {
  color: var(--gray-light);
  font-size: 0.95rem;
  margin: 0;
}

.prose {
  margin-top: 1.75rem;
}

.prose h2 {
  margin: 1.75rem 0 0.65rem;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.prose p {
  margin: 0 0 1rem;
  color: rgba(255, 255, 255, 0.9);
}

.prose ul {
  margin: 0.5rem 0 1.25rem 1.25rem;
  color: rgba(255, 255, 255, 0.9);
}

.prose li {
  margin: 0.35rem 0;
}

.callout {
  margin-top: 1.25rem;
  padding: 1rem 1.15rem;
  border-radius: 18px;
  border: 1px solid rgba(99, 102, 241, 0.25);
  background: rgba(99, 102, 241, 0.12);
}

.callout strong {
  display: block;
  margin-bottom: 0.25rem;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-top: 1.75rem;
}

.tile {
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  padding: 1.25rem;
}

.tile h3 {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
}

.tile p {
  margin: 0 0 1rem;
  color: var(--gray-light);
}

.tile .btn {
  width: 100%;
}

.page-footer {
  position: relative;
  z-index: 2;
  padding: 0 1.25rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--gray);
  font-size: 0.95rem;
}

.page-footer a {
  color: var(--gray-light);
  text-decoration: none;
  margin-left: 0.75rem;
}

.page-footer a:hover {
  color: var(--white);
}

@media (max-width: 768px) {
  .topbar-actions .btn {
    padding: 0.75rem 1.1rem;
  }
  .content-card {
    padding: 2rem 1.5rem;
    border-radius: 20px;
  }
  .grid {
    grid-template-columns: 1fr;
  }
  .page-footer {
    flex-direction: column;
    text-align: center;
  }
  .page-footer a {
    margin: 0 0.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bg-gradient-orb { animation: none !important; }
}