:root {
  --accent: #10b981;
  --accent-dim: #059669;
  --bg: #0a0a0f;
  --surface: #12121a;
  --surface-hover: #1a1a26;
  --border: #1e1e2a;
  --text: #e4e4ed;
  --text-dim: #8888a0;
  --radius: 12px;
  --nav-width: 220px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

code {
  word-break: break-all;
}

/* Side nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-width);
  height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
}

.nav-brand {
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--border);
}

.nav-brand a {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-brand a span { color: var(--accent); }

.nav-brand .sub {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 2px;
}

.nav-links {
  list-style: none;
  padding: 12px 0;
  flex: 1;
}

.nav-links li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  transition: all 0.15s;
  border-left: 2px solid transparent;
}

.nav-links li a:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.nav-links li a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: rgba(16, 185, 129, 0.04);
}

.nav-links .nav-section {
  padding: 16px 20px 6px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  opacity: 0.5;
}

.nav-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.nav-footer a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.82rem;
}

.nav-footer a:hover { color: var(--accent); }

/* Nav toggle (mobile) */
.nav-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 200;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text);
  font-size: 1.2rem;
  line-height: 1;
}

.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 90;
}

/* Main content area */
.main {
  margin-left: var(--nav-width);
  min-height: 100vh;
}

.container { max-width: 960px; margin: 0 auto; padding: 0 24px; }

/* Badge */
.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--accent);
  margin-bottom: 24px;
}

/* Section */
.section {
  padding: 100px 0;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section > .container > p {
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 600px;
  margin-bottom: 48px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  cursor: default;
}

.btn-primary {
  background: var(--accent);
  color: #0a0a0f;
}

.btn-primary:hover { background: var(--accent-dim); }

.btn-secondary {
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-secondary:hover { border-color: var(--text-dim); }

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
}

footer a {
  color: var(--text);
  text-decoration: none;
}

footer a:hover { color: var(--accent); }

/* Page header */
.page-header {
  padding: 80px 0 48px;
}

.page-header h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 12px;
}

.page-header h1 span { color: var(--accent); }

.page-header p {
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 600px;
}

/* Content card */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.card p {
  color: var(--text-dim);
  font-size: 0.9rem;
  line-height: 1.6;
}

.card ul {
  list-style: none;
  margin-top: 12px;
}

.card ul li {
  padding: 6px 0;
  font-size: 0.9rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card ul li::before {
  content: '';
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}

/* Compat table */
.compat-table {
  width: 100%;
  table-layout: fixed;
  border-collapse: separate;
  border-spacing: 0 2px;
}

.compat-table th:first-child,
.compat-table td:first-child {
  width: 60%;
}

.compat-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  opacity: 0.6;
}

.compat-table td {
  padding: 14px 16px;
  background: var(--surface);
  font-size: 0.9rem;
}

.compat-table td:first-child {
  border-radius: 8px 0 0 8px;
  font-weight: 600;
}

.compat-table td:last-child {
  border-radius: 0 8px 8px 0;
}

.compat-table td code {
  font-family: "SF Mono", "Fira Code", "Fira Mono", monospace;
  font-size: 0.85rem;
  background: rgba(255,255,255,0.04);
  padding: 1px 6px;
  border-radius: 4px;
}

.status-ok { color: var(--accent); }
.status-warn { color: #fbbf24; }
.status-no { color: #ef4444; }

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.stat {
  background: var(--surface);
  padding: 36px 24px;
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 4px;
}

/* Features grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2px;
  background: var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.feature-card {
  background: var(--surface);
  padding: 32px 28px;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.feature-card p {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(16, 185, 129, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 16px;
}

/* Compatibility grid */
.compat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 2px;
  background: var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.compat-item {
  background: var(--surface);
  padding: 28px 24px;
  text-align: center;
}

.compat-item code {
  font-family: "SF Mono", "Fira Code", "Fira Mono", monospace;
  font-size: 0.9rem;
  font-weight: 600;
}

.compat-status {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.78rem;
  padding: 2px 10px;
  border-radius: 100px;
}

.compat-status.ok {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent);
}

.compat-status.warn {
  background: rgba(251, 191, 36, 0.1);
  color: #fbbf24;
}

.compat-status.no {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

/* Download box */
.download-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 48px;
  text-align: center;
}

.download-box .icon-large {
  font-size: 3rem;
  margin-bottom: 16px;
}

.download-box h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.download-box p {
  color: var(--text-dim);
  margin-bottom: 32px;
}

.platform-grid {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.platform-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  cursor: default;
  min-width: 160px;
  justify-content: center;
}

.platform-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.platform-btn .arch {
  font-weight: 400;
  color: var(--text-dim);
  font-size: 0.8rem;
}

.coming-soon {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 24px;
  font-style: italic;
}

/* Responsive */
@media (max-width: 800px) {
  .nav {
    transform: translateX(-100%);
    transition: transform 0.25s ease;
  }

  .nav.open { transform: translateX(0); }

  .nav-toggle { display: flex; }

  .nav-overlay.visible { display: block; }

  .main { margin-left: 0; }

  .stats { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .download-box { padding: 32px 20px; }
  .features-grid { grid-template-columns: 1fr; }
  .page-header { padding: 80px 0 32px; }
  .page-header h1 { font-size: 1.6rem; }
}

@media (max-width: 640px) {
  .platform-grid { flex-direction: column; align-items: center; }
  .platform-btn { width: 100%; max-width: 280px; }
}