:root{
	--bg:#111111;           /* global background */
	--panel:#111111;        /* figure and chart background */
	--control:#1a1a1a;      /* inputs/buttons background */
	--text:#e9eef0;
	--muted:#9fb2bb;
	--accent:#00D9EA;       /* titles, emphasis, links */
	--btn:#1f2c31;
	--btn-text:#e9eef0;
	--border:#2a2a2a;
	--source-electric:#0099CC;
	--source-fossil:#FF6B6B;
	--source-process:#9C27B0;
}

html,body{height:100%}
body{font-family:'Lato',system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;margin:0;padding:0 1rem 2rem;color:var(--text);background:var(--bg)}
header{max-width:1100px;margin:1rem auto}
header h1{color:var(--accent);font-weight:700;margin:.5rem 0}
.note a, a{color:var(--accent);text-decoration:underline}
.note a:hover, a:hover{filter:brightness(1.1)}
.controls{max-width:1100px;margin:0.5rem auto;display:flex;flex-direction:column;gap:.6rem}
.control-row{display:flex;gap:.6rem;align-items:center;flex-wrap:wrap;width:100%}
.figure-meta{max-width:1100px;margin:0.5rem auto}
.figure-title{color:var(--accent);font-size:1.05rem;font-weight:700;margin:0.25rem 0 0.5rem}
main{max-width:1100px;margin:0 auto}
#chart-container{display:grid;grid-template-columns:1fr 320px;gap:1.5rem;align-items:stretch}
#chart{display:flex;justify-content:center;align-items:center;min-height:520px;border:1px solid var(--border);border-radius:8px;background:var(--panel);position:relative}
#centerLabel{position:absolute;text-align:center;pointer-events:none;font-size:1.4rem;font-weight:700;color:#FFFFFF;max-width:200px;line-height:1.4}
.note{color:var(--muted)}
.breadcrumb{color:var(--muted);font-size:0.9rem;margin:1rem auto 0.5rem;max-width:1100px;min-height:1.5rem;line-height:1.8;border:1px solid var(--border);border-radius:8px;background:var(--panel);padding:0.75rem 1rem}
.breadcrumb .path{color:var(--text)}
.breadcrumb .separator{margin:0 0.3rem;color:var(--muted)}
.breadcrumb .path-indent{display:inline-block;margin-left:1rem;color:var(--text);font-family:monospace}
.tooltip{position:fixed;background:#171717;color:#dff6fb;padding:.45rem .6rem;border:1px solid var(--border);border-radius:4px;pointer-events:none;font-size:.85rem;z-index:1000;transition:opacity 0.2s}
select,button,input{padding:.35rem .5rem;border:1px solid var(--border);border-radius:4px;background:var(--control);color:var(--text)}
button{background:var(--btn);color:var(--btn-text);border-color:var(--border)}
button:hover{filter:brightness(1.1)}
code{color:var(--accent)}
footer{max-width:1100px;margin:1rem auto 0; margin-bottom:2rem; text-align:center; color:var(--muted)}
/* Lightweight loading indicator */
.loading{color:var(--muted); text-align:center; padding:.5rem 0}
/* Ring breakdown tables */
.ring-breakdown{display:flex;flex-direction:column;gap:1rem}
.ring-table{background:var(--control);border:1px solid var(--border);border-radius:6px;padding:.75rem}
.ring-table h3{margin:0 0 .5rem;font-size:.95rem;font-weight:600;color:var(--accent)}
.ring-table table{width:100%;font-size:.85rem;border-collapse:collapse}
.ring-table th{text-align:left;padding:.3rem .4rem;border-bottom:1px solid var(--border);color:var(--muted);font-weight:600}
.ring-table td{padding:.3rem .4rem;border-bottom:1px solid rgba(255,255,255,0.05)}
.ring-table tr:last-child td{border-bottom:none}
.ring-table tbody tr{cursor:pointer;transition:background-color 0.2s}
.ring-table tbody tr:hover{background-color:rgba(0,217,234,0.1)}
.ring-table tbody tr.highlighted{background-color:rgba(0,217,234,0.2)}
.ring-table .value{text-align:right;font-family:monospace;color:var(--text)}
.ring-table .color-swatch{width:10px;height:10px;display:inline-block;border-radius:2px;margin-right:.3rem;vertical-align:middle}
/* Scrollable table container for middle ring (many rows) */
.ring-table .table-scroll-container{max-height:200px;overflow-y:auto;margin-top:0.5rem}
.ring-table .table-scroll-container::-webkit-scrollbar{width:8px}
.ring-table .table-scroll-container::-webkit-scrollbar-track{background:var(--control)}
.ring-table .table-scroll-container::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}
.ring-table .table-scroll-container::-webkit-scrollbar-thumb:hover{background:#3a3a3a}
@media (max-width: 900px) {
  #chart-container{grid-template-columns:1fr;gap:1rem}
  .ring-breakdown{flex-direction:row;flex-wrap:wrap}
  .ring-table{flex:1;min-width:250px}
}