:root {
  --bg: #0d1117;
  --panel: #161b22;
  --text: #c9d1d9;
  --muted: #8b949e;
  --accent: #58a6ff;
  --border: #30363d;
  --badge-bg: #2b323b;
  --hover: #1f242d;
  --info-bg: #0b1118;
  --tooltip-bg: #0f1622;
  --tooltip-border: #2d3640;
}
:root[data-theme="light"] {
  --bg: #ffffff;
  --panel: #f4f6f8;
  --text: #0b1220;
  --muted: #445168;
  --accent: #2563eb;
  --border: #d9e1ea;
  --badge-bg: #e9eef5;
  --hover: #e8eef7;
  --info-bg: #ffffff;
  --tooltip-bg: #ffffff;
  --tooltip-border: #d9e1ea;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial; background: var(--bg); color: var(--text); }
header { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--border); position: sticky; top: 0; background: rgba(13,17,23,0.9); backdrop-filter: blur(8px); }
html[data-theme="light"] header { background: rgba(255,255,255,0.9); }
header h1 { font-size: 18px; margin: 0; }
nav a { color: var(--muted); margin-left: 12px; text-decoration: none; }
nav a.active, nav a:hover { color: var(--accent); }
nav .btn { margin-left: 12px; padding: 6px 10px; background: transparent; color: var(--text); border: 1px solid var(--border); border-radius: 8px; cursor: pointer; }
.btn:hover { background: rgba(0,0,0,0.06); }
a { color: var(--accent); }
.container { max-width: 1200px; margin: 20px auto; padding: 0 16px; }
.controls { position: relative; margin-bottom: 16px; }
input#search { width: 100%; padding: 10px 12px; background: var(--panel); color: var(--text); border: 1px solid var(--border); border-radius: 8px; }
.dropdown { position: absolute; top: 40px; left: 0; right: 0; background: var(--panel); border: 1px solid var(--border); border-radius: 10px; display: none; z-index: 50; box-shadow: 0 10px 30px rgba(0,0,0,0.28); max-height: 320px; overflow: auto; padding: 6px; }
.dropdown-item { padding: 10px 12px; cursor: pointer; border-radius: 8px; color: var(--text); font-size: 14px; line-height: 1.35; }
.dropdown-item:hover, .dropdown-item.active, .dropdown-item:focus { background: var(--hover); outline: none; }
.dropdown .empty { padding: 10px 12px; color: var(--muted); }
.dropdown::-webkit-scrollbar { width: 10px; }
.dropdown::-webkit-scrollbar-thumb { background: var(--border); border-radius: 6px; }
.dropdown::-webkit-scrollbar-track { background: transparent; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; grid-gap: 16px; }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 12px; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { border-bottom: 1px solid var(--border); padding: 8px; }
.table tbody tr:hover { background: var(--hover); }
.badges { display: flex; flex-wrap: wrap; gap: 8px; }
.badge { background: var(--badge-bg); border: 1px solid var(--border); padding: 4px 8px; border-radius: 12px; color: var(--muted); }
/* Info bubble */
.info-dot { display:inline-flex; align-items:center; justify-content:center; width:18px; height:18px; border-radius:50%; border:1px solid var(--border); color: var(--accent); font-size:12px; margin-left:8px; cursor:help; position:relative; background: var(--info-bg); transition: background-color .15s ease, border-color .15s ease, color .15s ease; }
.info-dot::after { content:'i'; line-height: 1; font-weight:600; }
.info-dot:hover { background: var(--badge-bg); border-color: var(--accent); color: var(--accent); }
.info-dot:focus { outline: 2px solid var(--accent); outline-offset: 2px; }
.info-dot .tooltip { opacity: 0; transform: translateY(4px); pointer-events: none; }
.info-dot:hover .tooltip { opacity: 1; transform: translateY(0); pointer-events: auto; }
.tooltip { position:absolute; left:0; width: min(720px, 95vw); background: var(--tooltip-bg); color: var(--text); border:1px solid var(--tooltip-border); border-radius:12px; padding:14px 16px; z-index:1000; box-shadow: 0 12px 32px rgba(0,0,0,0.4); line-height:1.6; font-size: 14px; display:block; transition: opacity .15s ease, transform .15s ease; }
.tooltip.below { top: 24px; }
.tooltip.above { bottom: 24px; }
.tooltip.below::before { content: '';
  position: absolute; top:-8px; left:12px; width:0; height:0;
  border-left:8px solid transparent; border-right:8px solid transparent; border-bottom:8px solid var(--tooltip-border);
}
.tooltip.below::after { content: '';
  position: absolute; top:-7px; left:13px; width:0; height:0;
  border-left:7px solid transparent; border-right:7px solid transparent; border-bottom:7px solid var(--tooltip-bg);
}
.tooltip.above::before { content: '';
  position: absolute; bottom:-8px; left:12px; width:0; height:0;
  border-left:8px solid transparent; border-right:8px solid transparent; border-top:8px solid var(--tooltip-border);
}
.tooltip.above::after { content: '';
  position: absolute; bottom:-7px; left:13px; width:0; height:0;
  border-left:7px solid transparent; border-right:7px solid transparent; border-top:7px solid var(--tooltip-bg);
}
.tooltip a { color: var(--accent); text-decoration: underline; }
.tooltip p { margin: 0; }
/* Small notes and sources */
.note { color: var(--muted); font-size: 12px; margin-top: 6px; }
.source { color: var(--muted); font-size: 12px; margin-top: 6px; }
.source a { color: var(--accent); text-decoration: underline; }
footer { padding: 20px 16px; text-align: center; color: var(--muted); }

@media (max-width: 920px) {
  .grid-2 { grid-template-columns: 1fr; }
}