:root {
  --bg: #07090f;
  --bg-elevated: #0e1219;
  --bg-card: #121820;
  --border: #1e2938;
  --text: #e8edf5;
  --text-muted: #8b9cb3;
  --accent: #22c55e;
  --accent-dim: rgba(34, 197, 94, 0.15);
  --purple: #8b5cf6;
  --amber: #f59e0b;
  --cyan: #06b6d4;
  --red: #ef4444;
  --font-display: 'Syne', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --sidebar-w: 300px;
  --radius: 12px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-display);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(34, 197, 94, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 90% 10%, rgba(139, 92, 246, 0.06), transparent);
  pointer-events: none;
  z-index: 0;
}

.app {
  display: flex;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-elevated);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  overflow-y: auto;
  transition: transform 0.25s ease;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 20px;
  border-bottom: 1px solid var(--border);
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #059669);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 14px;
  color: #000;
}

.brand h1 { font-size: 16px; font-weight: 700; letter-spacing: -0.02em; }
.brand p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.atlas-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
}

.atlas-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  padding: 6px 8px;
  border-radius: 8px;
  transition: background 0.15s, color 0.15s;
}

.atlas-nav a:hover,
.atlas-nav a.active {
  color: var(--text);
  background: rgba(34, 197, 94, 0.08);
}

.search-wrap { padding: 16px 20px 8px; }

.search-wrap input {
  width: 100%;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
}

.search-wrap input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.filters { padding: 8px 20px 16px; display: flex; flex-direction: column; gap: 8px; }

.filter-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-top: 4px;
}

.filters select {
  width: 100%;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
  margin-top: 4px;
}

.system-nav {
  flex: 1;
  padding: 0 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.system-nav button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 8px 12px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s, color 0.15s;
}

.system-nav button:hover,
.system-nav button.active {
  background: var(--accent-dim);
  color: var(--accent);
}

.system-nav .count {
  font-family: var(--font-mono);
  font-size: 11px;
  opacity: 0.7;
}

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

.stats { font-size: 11px; color: var(--text-muted); font-family: var(--font-mono); line-height: 1.6; }

.main {
  flex: 1;
  margin-left: var(--sidebar-w);
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(7, 9, 15, 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
}

.topbar-title h2 { font-size: 20px; font-weight: 700; letter-spacing: -0.02em; }
.topbar-title p { font-size: 13px; color: var(--text-muted); }

.topbar-actions { margin-left: auto; display: flex; gap: 8px; }

.btn {
  padding: 8px 16px;
  border-radius: 8px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s;
}

.btn-primary {
  background: var(--accent);
  color: #000;
}
.btn-primary:hover { filter: brightness(1.1); }

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.hero {
  padding: 28px;
  border-bottom: 1px solid var(--border);
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.hero-stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.hero-stat span {
  display: block;
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--accent);
}

.hero-stat label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.domain-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.domain-chip {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
}

.domain-chip.primary { border-color: var(--accent); color: var(--accent); }
.domain-chip:hover, .domain-chip.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

.deep-dives {
  padding: 28px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

.system-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.system-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  user-select: none;
}

.system-card-header:hover { background: rgba(255,255,255,0.02); }

.system-emoji { font-size: 24px; }

.system-card-header h4 {
  font-size: 15px;
  font-weight: 700;
  flex: 1;
}

.system-card-body {
  padding: 0 18px 18px;
  display: none;
}

.system-card.open .system-card-body { display: block; }

.system-card-body p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.system-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 11px;
}

.system-meta span {
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
}

.sites-section { padding: 0 28px 48px; }

.sites-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.sites-header h3 { font-size: 18px; font-weight: 700; }

.badge {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--accent-dim);
  color: var(--accent);
}

.sites-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s;
}

.site-card.featured { border-color: var(--amber); }
.site-card:hover { border-color: rgba(34, 197, 94, 0.4); }

.site-card-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
}

.site-card-header:hover { background: rgba(255,255,255,0.015); }

.site-info { flex: 1; min-width: 0; }

.site-info h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.site-url {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  word-break: break-all;
  text-decoration: none;
}

.site-url:hover { text-decoration: underline; }

.site-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.tag, .status-badge {
  font-size: 10px;
  font-family: var(--font-mono);
  padding: 3px 8px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.status-live { background: rgba(34,197,94,0.15); color: #4ade80; }
.status-preview { background: rgba(245,158,11,0.15); color: #fbbf24; }
.status-broken { background: rgba(239,68,68,0.15); color: #f87171; }
.status-tunnel-down { background: rgba(100,116,139,0.2); color: #94a3b8; }
.status-unknown { background: rgba(100,116,139,0.15); color: #64748b; }
.status-probed-ok { background: rgba(34,197,94,0.2); color: #86efac; }
.status-probed-fail { background: rgba(239,68,68,0.2); color: #fca5a5; }

.tag { background: var(--bg); border: 1px solid var(--border); color: var(--text-muted); }
.tag-featured { border-color: var(--amber); color: var(--amber); }

.site-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.icon-btn {
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  font-size: 11px;
  font-family: var(--font-mono);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s;
}

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

.site-card-body {
  display: none;
  padding: 0 18px 18px;
  border-top: 1px solid var(--border);
}

.site-card.open .site-card-body { display: block; padding-top: 16px; }

.site-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 14px;
  line-height: 1.6;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.detail-item label {
  display: block;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.detail-item span, .detail-item code {
  font-size: 12px;
  font-family: var(--font-mono);
  word-break: break-all;
}

.deploy-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.deploy-box code {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  color: var(--text);
  word-break: break-all;
}

.empty-state {
  text-align: center;
  padding: 48px;
  color: var(--text-muted);
}

.hidden { display: none !important; }

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  background: var(--bg-card);
  border: 1px solid var(--accent);
  border-radius: 8px;
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--accent);
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.25s;
  z-index: 200;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.chevron {
  color: var(--text-muted);
  transition: transform 0.2s;
  font-size: 12px;
  margin-top: 4px;
}

.site-card.open .chevron,
.system-card.open .chevron { transform: rotate(180deg); }

@media (max-width: 960px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0; }
  .menu-toggle { display: block; }
  .hero-grid { grid-template-columns: repeat(2, 1fr); }
  .deep-dives { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .hero-grid { grid-template-columns: 1fr 1fr; }
  .topbar { padding: 12px 16px; }
  .hero, .deep-dives, .sites-section { padding-left: 16px; padding-right: 16px; }
}