:root {
  --bg-primary: #09090b;
  --bg-elevated: #111115;
  --bg-card: rgba(24, 24, 27, 0.72);
  --bg-subtle: rgba(39, 39, 42, 0.45);
  --border-hairline: rgba(63, 63, 70, 0.55);
  --border-accent: rgba(99, 102, 241, 0.45);
  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent-indigo: #6366f1;
  --accent-indigo-light: #818cf8;
  --accent-sky: #0ea5e9;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  --accent-amber: #f59e0b;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
  overflow-x: hidden;
}

body {
  background-color: var(--bg-primary);
  background-image:
    radial-gradient(circle at 15% 0%, rgba(99, 102, 241, 0.13), transparent 38%),
    radial-gradient(circle at 85% 10%, rgba(14, 165, 233, 0.09), transparent 35%);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

a {
  color: var(--accent-indigo-light);
  text-decoration: none;
  transition: color 0.15s ease, opacity 0.15s ease;
  overflow-wrap: anywhere;
}

a:hover {
  color: #a5b4fc;
  text-decoration: underline;
}

code, pre, .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

code {
  background: rgba(63, 63, 70, 0.4);
  border: 1px solid rgba(82, 82, 91, 0.45);
  color: #e4e4e7;
  padding: 0.15rem 0.4rem;
  border-radius: 0.35rem;
  font-size: 0.84em;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Top Navigation Bar */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(9, 9, 11, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-hairline);
}

.nav-inner {
  min-height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  position: relative;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  text-decoration: none !important;
  flex-shrink: 0;
}

.brand-dot {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 3px;
  background: var(--accent-indigo);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.85);
  flex-shrink: 0;
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
  background: rgba(99, 102, 241, 0.14);
  border: 1px solid rgba(99, 102, 241, 0.35);
  color: #a5b4fc;
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.35rem;
  height: 2.35rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border-hairline);
  background: rgba(39, 39, 42, 0.55);
  color: var(--text-primary);
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.nav-toggle:hover {
  background: rgba(63, 63, 70, 0.65);
}

.nav-toggle svg {
  width: 1.2rem;
  height: 1.2rem;
}

.nav-toggle .icon-close {
  display: none;
}

.site-header.nav-open .nav-toggle .icon-menu {
  display: none;
}

.site-header.nav-open .nav-toggle .icon-close {
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.52rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.86rem;
  font-weight: 500;
  text-decoration: none !important;
  transition: all 0.15s ease;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-indigo);
  color: #ffffff !important;
  border: 1px solid rgba(129, 140, 248, 0.4);
  box-shadow: 0 4px 18px rgba(99, 102, 241, 0.28);
}

.btn-primary:hover {
  background: #4f46e5;
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(39, 39, 42, 0.65);
  color: var(--text-primary) !important;
  border: 1px solid var(--border-hairline);
}

.btn-secondary:hover {
  background: rgba(63, 63, 70, 0.65);
  border-color: rgba(113, 113, 122, 0.7);
}

/* Mobile & Tablet Navigation Drawer */
@media (max-width: 820px) {
  .nav-inner {
    flex-wrap: wrap;
    min-height: 3.75rem;
    padding: 0.55rem 0;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 0.65rem 0 0.35rem;
    margin-top: 0.35rem;
    border-top: 1px solid rgba(63, 63, 70, 0.45);
  }

  .site-header.nav-open .nav-links {
    display: flex;
  }

  .nav-links a:not(.btn) {
    padding: 0.6rem 0.75rem;
    border-radius: 0.45rem;
    font-size: 0.92rem;
    color: var(--text-secondary);
  }

  .nav-links a:not(.btn):hover,
  .nav-links a:not(.btn).active {
    background: rgba(39, 39, 42, 0.55);
    color: var(--text-primary);
  }

  .nav-links .btn {
    margin-top: 0.35rem;
    width: 100%;
    padding: 0.65rem 1rem;
    font-size: 0.9rem;
    justify-content: center;
  }
}

/* Hero Section */
.hero {
  padding: 4.25rem 0 3.25rem;
  text-align: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: rgba(24, 24, 27, 0.9);
  border: 1px solid var(--border-hairline);
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 1.4rem;
  max-width: 100%;
  flex-wrap: wrap;
}

.hero-title {
  font-size: clamp(1.9rem, 5.2vw, 3.6rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.13;
  max-width: 850px;
  margin: 0 auto 1.2rem;
}

.gradient-text {
  background: linear-gradient(135deg, #ffffff 0%, #c7d2fe 55%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 1.85rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.4rem;
}

.hero-legal-bar {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem 0.85rem;
  flex-wrap: wrap;
  justify-content: center;
  font-size: 0.81rem;
  color: var(--text-muted);
  padding: 0.55rem 0.95rem;
  border-radius: 0.5rem;
  background: rgba(24, 24, 27, 0.55);
  border: 1px solid rgba(63, 63, 70, 0.4);
  max-width: 100%;
}

@media (max-width: 600px) {
  .hero {
    padding: 2.25rem 0 2rem;
  }

  .hero-eyebrow {
    font-size: 0.72rem;
    border-radius: 0.65rem;
    padding: 0.4rem 0.7rem;
  }

  .hero-subtitle {
    font-size: 0.94rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }
}

/* Mockup Preview Window */
.app-preview {
  margin-top: 2.5rem;
  border-radius: 0.85rem;
  border: 1px solid var(--border-hairline);
  background: #0c0c0f;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(99, 102, 241, 0.12);
  overflow: hidden;
  text-align: left;
}

.app-preview-bar {
  min-height: 2.5rem;
  padding: 0.4rem 0.9rem;
  background: #121216;
  border-bottom: 1px solid var(--border-hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.app-preview-bar .mono {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.window-dots {
  display: flex;
  gap: 0.4rem;
  flex-shrink: 0;
}

.window-dots span {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 999px;
  background: #27272a;
}

.window-dots span:nth-child(1) { background: #ef4444; }
.window-dots span:nth-child(2) { background: #f59e0b; }
.window-dots span:nth-child(3) { background: #10b981; }

.preview-grid {
  display: grid;
  grid-template-columns: 220px 1fr 250px;
  min-height: 320px;
}

@media (max-width: 900px) {
  .preview-grid {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .preview-sidebar, .preview-inspector {
    display: none;
  }
}

.preview-sidebar {
  border-right: 1px solid var(--border-hairline);
  padding: 1rem;
  background: #09090b;
}

.preview-main {
  padding: 1rem;
  background: #0c0c0f;
  position: relative;
}

.preview-inspector {
  border-left: 1px solid var(--border-hairline);
  padding: 1rem;
  background: #09090b;
}

.event-chip {
  padding: 0.55rem 0.7rem;
  border-radius: 0.45rem;
  margin-bottom: 0.6rem;
  font-size: 0.8rem;
  border-left: 3px solid var(--accent-indigo);
  background: rgba(99, 102, 241, 0.14);
}

.event-chip.sky {
  border-left-color: var(--accent-sky);
  background: rgba(14, 165, 233, 0.14);
}

.event-chip.emerald {
  border-left-color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.14);
}

/* Feature & Architecture Sections */
.section {
  padding: 3.5rem 0;
  border-top: 1px solid rgba(63, 63, 70, 0.35);
}

.section-header {
  max-width: 680px;
  margin-bottom: 2rem;
}

.section-title {
  font-size: clamp(1.4rem, 3.5vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 0.5rem;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.15rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: 0.75rem;
  padding: 1.35rem;
  transition: border-color 0.15s ease;
}

.card:hover {
  border-color: rgba(129, 140, 248, 0.45);
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.5rem;
  background: rgba(99, 102, 241, 0.14);
  color: #a5b4fc;
  margin-bottom: 0.85rem;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.85rem;
}

.card h3 {
  font-size: 1.02rem;
  font-weight: 600;
  margin-bottom: 0.45rem;
}

.card p {
  font-size: 0.89rem;
  color: var(--text-secondary);
}

/* Legal Document Layout (Privacy Policy & Terms of Service) */
.legal-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 2.25rem;
  padding: 2.5rem 0 4.5rem;
  align-items: start;
}

@media (max-width: 860px) {
  .legal-layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 1.5rem 0 3rem;
  }
  .legal-toc {
    position: static !important;
  }
}

.legal-toc {
  position: sticky;
  top: 5.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: 0.75rem;
  padding: 1.15rem;
}

.legal-toc-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.legal-toc ol {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.legal-toc a {
  font-size: 0.84rem;
  color: var(--text-secondary);
  display: block;
  line-height: 1.35;
}

.legal-toc a:hover {
  color: var(--text-primary);
}

.legal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: 0.85rem;
  padding: 2.25rem;
  min-width: 0;
}

@media (max-width: 640px) {
  .legal-content {
    padding: 1.25rem;
  }
}

.legal-header {
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 1.25rem;
  margin-bottom: 1.75rem;
}

.legal-header h1 {
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.legal-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  gap: 0.4rem 1.25rem;
  flex-wrap: wrap;
}

.legal-section {
  margin-bottom: 2rem;
  scroll-margin-top: 5.5rem;
}

.legal-section h2 {
  font-size: 1.18rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: 0.65rem;
  color: #ffffff;
}

.legal-section h3 {
  font-size: 0.98rem;
  font-weight: 600;
  margin: 1rem 0 0.45rem;
  color: #e4e4e7;
}

.legal-section p {
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
  font-size: 0.93rem;
}

.legal-section ul,
.legal-section ol {
  margin: 0.5rem 0 1rem 1.25rem;
  color: var(--text-secondary);
  font-size: 0.93rem;
}

.legal-section li {
  margin-bottom: 0.45rem;
}

.legal-section li strong {
  color: var(--text-primary);
}

.callout-box {
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.4);
  border-left: 4px solid var(--accent-indigo);
  border-radius: 0.6rem;
  padding: 1rem 1.15rem;
  margin: 1.15rem 0;
}

.callout-box.emerald {
  background: rgba(16, 185, 129, 0.09);
  border-color: rgba(16, 185, 129, 0.35);
  border-left-color: var(--accent-emerald);
}

.callout-title {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.scope-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1rem 0 1.25rem;
  border: 1px solid var(--border-hairline);
  border-radius: 0.6rem;
}

.scope-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
  text-align: left;
  min-width: 520px;
}

.scope-table th,
.scope-table td {
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid var(--border-hairline);
  vertical-align: top;
}

.scope-table th {
  background: rgba(39, 39, 42, 0.5);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.scope-table tr:last-child td {
  border-bottom: none;
}

/* Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-hairline);
  background: #070709;
  padding: 2.25rem 0;
  font-size: 0.84rem;
  color: var(--text-muted);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 0.65rem 1.35rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
}

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

@media (max-width: 640px) {
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}