/* Aether Midnight Design System */
/* Electric Indigo (#b4c5ff) + Midnight Blue (#0c1321) */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600;700&display=swap');

:root {
  --color-surface: #0c1321;
  --color-surface-container: #19202e;
  --color-surface-container-low: #151b2a;
  --color-surface-container-high: #232a39;
  --color-surface-container-highest: #2e3544;
  --color-primary: #b4c5ff;
  --color-primary-container: #2563eb;
  --color-secondary: #7bd0ff;
  --color-secondary-container: #00a6e0;
  --color-on-surface: #dce2f6;
  --color-on-surface-variant: #c3c6d7;
  --color-outline: #8d90a0;
  --color-outline-variant: #434655;
  --color-on-primary-fixed: #00174b;
  --color-error: #ffb4ab;
  --color-text-primary: #f8fafc;
  --color-text-secondary: #e2e8f0;
  --color-text-muted: #c3c6d7;
  --color-border: rgba(67, 70, 85, 0.15);
  --color-border-light: rgba(67, 70, 85, 0.25);

  color-scheme: dark;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: var(--color-surface);
  color: var(--color-on-surface);
}

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

body {
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 10%, rgba(37, 99, 235, 0.2), transparent 55%),
    radial-gradient(circle at 80% 0%, rgba(123, 208, 255, 0.1), transparent 60%),
    var(--color-surface);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4, p { margin: 0; }

/* Layout */
.page {
  width: min(1100px, 92vw);
  margin: 0 auto;
  padding: 2.5rem 0 4rem;
  display: grid;
  gap: 3.5rem;
}

header { display: grid; gap: 2rem; }

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.logo {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

.logo-tld { color: var(--color-primary); }

.nav-links {
  display: flex;
  gap: 1.5rem;
  font-size: 0.85rem;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-on-surface-variant);
}

.nav-links a:hover { color: var(--color-primary); }

/* Hero Section */
.hero {
  display: grid;
  gap: 1.5rem;
  padding: clamp(2rem, 5vw, 3.5rem);
}

.hero h1 {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2.2rem, 4.5vw, 3.5rem);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-on-surface);
}

.hero p {
  color: var(--color-on-surface-variant);
  font-size: 1.1rem;
  line-height: 1.6;
  max-width: 36rem;
}

.hero-eyebrow {
  color: var(--color-primary);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin: 0;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 0.5rem;
}

/* Text Gradient */
.text-gradient {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-container) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Buttons */
.button {
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  border: none;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  cursor: pointer;
  font-size: 0.95rem;
  transition: transform 0.2s ease, box-shadow 0.3s ease;
  display: inline-block;
  text-align: center;
}

.button.primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-container));
  color: var(--color-on-primary-fixed);
  box-shadow: 0 12px 30px -8px rgba(37, 99, 235, 0.4);
}

.button.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px -8px rgba(180, 197, 255, 0.35);
}

.button.secondary {
  background: rgba(46, 53, 68, 0.4);
  backdrop-filter: blur(20px);
  color: var(--color-on-surface);
  border: 1px solid var(--color-border-light);
}

.button.secondary:hover {
  background: rgba(180, 197, 255, 0.08);
  border-color: rgba(180, 197, 255, 0.3);
  transform: translateY(-1px);
}

/* Glass Card */
.glass-card {
  background: rgba(46, 53, 68, 0.4);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
}

/* Ghost Border */
.ghost-border {
  border-bottom: 1px solid rgba(67, 70, 85, 0.15);
}

/* Grid Layout */
.grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Cards */
.card {
  background: var(--color-surface-container-low);
  border-radius: 1rem;
  padding: 1.75rem;
  transition: background-color 0.3s ease;
}

.card:hover {
  background: var(--color-surface-container);
}

.card h3 {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
}

.card-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-container));
  color: var(--color-on-primary-fixed);
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
}

/* Persona Tabs */
.persona-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.persona-tab {
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  border: none;
  background: var(--color-surface-container-high);
  color: var(--color-on-surface-variant);
  transition: all 0.3s ease;
}

.persona-tab.active,
.persona-tab:hover {
  background: var(--color-primary-container);
  color: var(--color-text-primary);
}

.persona-content {
  min-height: 5rem;
  position: relative;
}

.persona-slide {
  display: none;
}

.persona-slide.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Section styles */
.workflow-section,
.features-section,
.credits-section,
.portfolio-section,
.b2b-section,
.faq-section {
  display: grid;
  gap: 1.5rem;
}

.workflow-section h2,
.features-section h2,
.credits-section h2,
.portfolio-section h2,
.b2b-section h2,
.faq-section h2 {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
}

.section-subtitle {
  color: var(--color-on-surface-variant);
  max-width: 600px;
  line-height: 1.6;
}

/* Credits Card */
.credits-card {
  display: grid;
  gap: 1.5rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), var(--color-surface-container-low));
}

/* Code Snippets */
.code-snippet {
  display: block;
  margin-top: 0.75rem;
  padding: 0.6rem 0.8rem;
  background: var(--color-surface);
  border-radius: 8px;
  font-family: "JetBrains Mono", "SF Mono", monospace;
  font-size: 0.8rem;
  color: var(--color-secondary);
  border: 1px solid var(--color-border);
  overflow-x: auto;
}

/* Portfolio Domains */
.portfolio-domains {
  padding: 1rem 1.5rem;
  background: var(--color-surface-container-low);
  border-radius: 1rem;
  text-align: center;
}

.portfolio-domains p {
  font-size: 0.85rem;
  line-height: 1.8;
}

/* Bento Grid */
.bento-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(3, 1fr);
}

.bento-wide { grid-column: span 2; }
.bento-tall { grid-row: span 2; }
.bento-full { grid-column: 1 / -1; }

/* Feature Icon */
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 0.75rem;
  background: var(--color-surface-container-highest);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
  transition: background-color 0.3s ease;
}

.card:hover .feature-icon {
  background: var(--color-primary-container);
}

/* Social Proof */
.social-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-top: 0.5rem;
}

.proof-item {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* FAQ Accordion */
details {
  background: var(--color-surface-container-low);
  border-radius: 1rem;
  transition: background-color 0.3s ease;
}

details[open] {
  background: var(--color-surface-container);
}

details summary {
  padding: 1.25rem 1.5rem;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text-primary);
}

details summary::-webkit-details-marker { display: none; }

details summary::after {
  content: "+";
  font-size: 1.25rem;
  color: var(--color-primary);
  transition: transform 0.3s ease;
}

details[open] summary::after {
  content: "−";
}

details .faq-answer {
  padding: 0 1.5rem 1.25rem;
  color: var(--color-on-surface-variant);
  line-height: 1.6;
  font-size: 0.95rem;
}

/* Footer */
footer {
  text-align: center;
  color: var(--color-outline);
  font-size: 0.85rem;
  padding-top: 2rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1rem;
}

.footer-links a {
  font-family: "Inter", sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-outline);
  transition: color 0.3s ease;
}

.footer-links a:hover { color: var(--color-primary); }

/* Muted Text */
.muted {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Responsive */
@media (max-width: 768px) {
  .page { padding: 1.5rem 0 3rem; gap: 2.5rem; }
  .nav-links { flex-wrap: wrap; gap: 1rem; font-size: 0.8rem; order: 3; width: 100%; }
  nav { gap: 0.5rem; }
  .hero { padding: clamp(1.5rem, 4vw, 2rem); gap: 1.25rem; }
  .hero h1 { font-size: clamp(1.8rem, 3.5vw, 2.5rem); }
  .hero p { font-size: 0.95rem; }
  .grid { grid-template-columns: 1fr; gap: 1.25rem; }
  .bento-grid { grid-template-columns: 1fr; }
  .bento-wide { grid-column: span 1; }
  .button { padding: 0.75rem 1.4rem; font-size: 0.9rem; }
  .hero-cta { flex-direction: column; gap: 0.75rem; }
  .card { padding: 1.25rem; }
  .social-proof { flex-direction: column; gap: 0.75rem; }
  .code-snippet { font-size: 0.75rem; }
  .footer-links { gap: 1.5rem; }
  footer { margin-top: 1rem; padding-top: 1.5rem; }
}

@media (max-width: 480px) {
  .logo { font-size: 1.1rem; }
  .nav-links { gap: 0.75rem; font-size: 0.75rem; }
  .button.secondary { font-size: 0.85rem; padding: 0.7rem 1.2rem; }
  .hero h1 { font-size: clamp(1.5rem, 2.5vw, 2rem); line-height: 1.2; }
  .card h3 { font-size: 1rem; }
  .muted { font-size: 0.9rem; }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

a:focus, button:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

@media (prefers-contrast: more) {
  .button.secondary { border-color: var(--color-primary); }
  .card { border: 1px solid var(--color-border-light); }
}