:root {
  --bg: #0d1117;
  --bg-2: #161b22;
  --bg-3: #1c2128;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-dim: #1f6feb;
  --green: #3fb950;
  --green-dim: #196c2e;
  --radius: 8px;
  --max-width: 1100px;
}

[data-theme="light"] {
  --bg: #dde3ea;
  --bg-2: #e8ecf0;
  --bg-3: #d4dae1;
  --border: #b8c0cb;
  --text: #1f2328;
  --text-muted: #555e6a;
  --accent: #0969da;
  --accent-dim: #0550ae;
  --green: #1a7f37;
  --green-dim: #c6efce;
}

[data-theme="light"] body {
  background-image: radial-gradient(circle, #b8c0cb 1px, transparent 1px);
}

[data-theme="light"] .hero-logo {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .hero {
  background: radial-gradient(ellipse 90% 60% at 50% 0%, rgba(9, 105, 218, 0.08) 0%, transparent 100%);
}

[data-theme="light"] header {
  background: rgba(255, 255, 255, 0.92);
}

[data-theme="light"] section:nth-of-type(even) {
  background-color: rgba(234, 238, 242, 0.6);
}

[data-theme="light"] .btn-primary {
  color: #ffffff;
}

[data-theme="light"] .nav-cta {
  color: #ffffff !important;
}

[data-theme="light"] pre {
  background: var(--bg-3);
}

[data-theme="light"] .region.active {
  background: rgba(26, 127, 55, 0.06);
}

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

body {
  background-color: var(--bg);
  background-image: radial-gradient(circle, #21262d 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
header {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  background: rgba(13, 17, 23, 0.92);
  backdrop-filter: blur(12px);
  z-index: 100;
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.brand-tag {
  font-size: 0.75rem;
  color: var(--accent);
}

nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

nav a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.15s;
}

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

.nav-cta {
  background: var(--accent-dim);
  color: var(--text) !important;
  padding: 6px 14px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
}

.nav-cta:hover {
  background: var(--accent);
}

.theme-switch {
  display: flex;
  align-items: center;
  cursor: pointer;
  flex-shrink: 0;
}

.theme-switch input {
  display: none;
}

.switch-track {
  width: 42px;
  height: 24px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 12px;
  position: relative;
  transition: background 0.2s, border-color 0.2s;
}

.switch-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: transform 0.2s, background 0.2s;
}

.theme-switch input:checked + .switch-track {
  background: var(--accent-dim);
  border-color: var(--accent);
}

.theme-switch input:checked + .switch-track .switch-thumb {
  transform: translateX(18px);
  background: var(--accent);
}

/* Hero */
.hero-inner {
  display: flex;
  align-items: center;
  gap: 64px;
}

.hero-content {
  flex: 1;
  min-width: 0;
}

.hero-logo {
  flex-shrink: 0;
  border-radius: 48px;
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
  line-height: 0;
}

.hero-logo img {
  width: 380px;
  max-width: 100%;
  display: block;
}

.hero {
  padding: 80px 0 72px;
  border-bottom: 1px solid var(--border);
  background: radial-gradient(ellipse 90% 60% at 50% 0%, rgba(31, 111, 235, 0.18) 0%, transparent 100%);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--text) 0%, var(--text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 620px;
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-sub a { color: var(--accent); }

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 500;
  transition: opacity 0.15s, background 0.15s;
}

.btn-primary {
  background: var(--accent);
  color: #0d1117;
}

.btn-primary:hover {
  opacity: 0.85;
  text-decoration: none;
}

.btn-secondary {
  background: var(--bg-3);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-2);
  text-decoration: none;
}

/* Sections */
section { padding: 72px 0; border-bottom: 1px solid var(--border); }

section:nth-of-type(even) { background-color: rgba(22, 27, 34, 0.6); }

section h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-sub {
  color: var(--text-muted);
  max-width: 680px;
  margin-bottom: 40px;
  line-height: 1.7;
}

/* What section cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 40px;
}

.card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.card-icon {
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

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

/* Tools */
.tool-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
  margin-top: 40px;
}

.tool-card {
  display: block;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  color: var(--text);
  transition: border-color 0.15s;
}

.tool-card:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.tool-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
}

.tool-name {
  font-weight: 600;
  font-size: 1rem;
}

.tool-url {
  font-size: 0.8rem;
  color: var(--accent);
}

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

.tool-card p a { color: var(--accent); }

/* Connect */
.broker-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 40px;
}

.broker-detail {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.875rem;
  color: var(--accent);
  background: var(--bg-3);
  padding: 2px 6px;
  border-radius: 4px;
}

.connect-tabs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.tab-group {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.tab-group h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.tab-group p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

pre {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  overflow-x: auto;
  margin-bottom: 12px;
}

pre code {
  background: none;
  padding: 0;
  font-size: 0.85rem;
  color: var(--text);
  line-height: 1.6;
}

.hint {
  font-size: 0.8rem !important;
  color: var(--text-muted) !important;
}

.hint code { font-size: 0.8rem; }

/* Coverage */
.regions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 40px;
}

.region {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 28px;
  min-width: 120px;
}

.region.active {
  border-color: var(--green);
  background: rgba(63, 185, 80, 0.05);
}

.region-code {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  font-family: "SFMono-Regular", Consolas, monospace;
}

.region.active .region-code { color: var(--green); }

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

.region-status {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border-radius: 20px;
}

.region.active .region-status {
  background: var(--green-dim);
  color: var(--green);
}

.region:not(.active) .region-status {
  background: var(--bg-3);
  color: var(--text-muted);
}

/* Community */
.community-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 40px;
}

.community-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  color: var(--text);
  transition: border-color 0.15s;
}

.community-card:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.community-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.community-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
}

.community-url {
  font-size: 0.8rem;
  color: var(--accent);
  margin-top: 4px;
}

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

footer p + p { margin-top: 6px; }
footer a { color: var(--text-muted); }
footer a:hover { color: var(--text); }

.hamburger {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 5px 10px;
  font-size: 1.1rem;
  cursor: pointer;
  color: var(--text);
  line-height: 1;
}

.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 57px;
  z-index: 99;
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav-link {
  padding: 14px 24px;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

.mobile-nav-link:last-child { border-bottom: none; }
.mobile-nav-link:hover { background: var(--bg-3); text-decoration: none; }

/* Mobile */
@media (max-width: 640px) {
  nav a { display: none; }
  .hamburger { display: block; }
  .hero { padding: 48px 0; }
  .hero-inner { flex-direction: column-reverse; gap: 32px; }
  .hero-logo img { width: 100%; }
  section { padding: 48px 0; }
  .broker-info { grid-template-columns: 1fr 1fr; }
  .regions { justify-content: center; }
}