:root {
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, monospace;
  --radius: 6px;
}

html[data-theme="dark"] {
  --bg: #0b1120;
  --bg-elevated: #0f172a;
  --fg: #f1f5f9;
  --fg-muted: #94a3b8;
  --accent: #22d3ee;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --border: #1e293b;
  --chart-gridline: #1e293b;
}

html[data-theme="light"] {
  --bg: #ffffff;
  --bg-elevated: #f9fafb;
  --fg: #111827;
  --fg-muted: #6b7280;
  --accent: #059669;
  --success: #059669;
  --warning: #d97706;
  --danger: #dc2626;
  --border: #e5e7eb;
  --chart-gridline: #e5e7eb;
}

html[data-theme="warm"] {
  --bg: #fffbeb;
  --bg-elevated: #ffffff;
  --fg: #78350f;
  --fg-muted: #92400e;
  --accent: #b45309;
  --success: #65a30d;
  --warning: #d97706;
  --danger: #b91c1c;
  --border: #fde68a;
  --chart-gridline: #fde68a;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 600; color: var(--fg); }
.app-nav { display: flex; gap: 18px; }
.app-nav a { color: var(--fg-muted); text-decoration: none; font-size: 14px; }
.app-nav a:hover, .app-nav a.active { color: var(--fg); }
.app-nav-right { display: flex; gap: 10px; align-items: center; }
.app-nav-right button, .app-nav-right select {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg-muted);
  border-radius: var(--radius);
  padding: 4px 10px;
  font-size: 12px;
  cursor: pointer;
}
.app-main { padding: 24px 32px; max-width: 1200px; margin: 0 auto; }
.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}
.score-pill {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 13px;
}
.score-pill.good { background: color-mix(in srgb, var(--success) 20%, transparent); color: var(--success); }
.score-pill.mid  { background: color-mix(in srgb, var(--warning) 20%, transparent); color: var(--warning); }
.score-pill.bad  { background: color-mix(in srgb, var(--danger) 20%, transparent);  color: var(--danger); }

.nav-dropdown { position: relative; display: inline-block; }
.nav-dropdown-menu {
  position: absolute; top: 100%; left: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 0;
  min-width: 200px;
  display: none;
  z-index: 50;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu { display: block; }
.nav-dropdown-menu a {
  display: block;
  padding: 8px 14px;
  color: var(--fg);
  text-decoration: none;
  font-size: 13px;
}
.nav-dropdown-menu a:hover,
.nav-dropdown-menu a.active {
  background: var(--bg);
  color: var(--accent);
}