:root {
    --bg: #0f1115;
    --panel: #181b22;
    --panel-2: #1f232c;
    --border: #2a2f3a;
    --text: #e8ecf2;
    --muted: #95a0b3;
    --accent: #4ea1ff;
    --pos: #4cd07a;
    --neg: #ff6b6b;
    --warn: #ffcc66;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
                 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.45;
}
header {
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}
header h1 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.2px;
}
header h1 span { color: var(--accent); }
nav { display: flex; gap: 4px; }
nav a {
    text-decoration: none;
    color: var(--muted);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 13px;
    transition: background 0.15s, color 0.15s;
}
nav a:hover { background: var(--panel-2); color: var(--text); }
nav a.active { background: var(--accent); color: #0f1115; font-weight: 600; }

/* Protected pages: subtle dim + lock glyph + "(login)" suffix.
   The lock + tag both inherit the parent color so the active state
   recolors them cleanly. */
nav a.protected { opacity: 0.78; }
nav a.protected:hover { opacity: 1; }
nav a.protected.active { opacity: 1; }
nav a .lock {
    display: inline-block;
    margin-right: 5px;
    font-size: 11px;
    transform: translateY(-0.5px);
}
nav a .lock-tag {
    display: inline-block;
    margin-left: 6px;
    font-size: 10px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 1px 6px;
    border: 1px solid var(--border);
    border-radius: 4px;
}
nav a.protected.active .lock-tag {
    color: #0f1115;
    border-color: rgba(15, 17, 21, 0.4);
}
nav a.protected:hover .lock-tag {
    color: var(--text);
    border-color: var(--text);
}
.updated {
    color: var(--muted);
    font-size: 12px;
}
main { padding: 24px; max-width: 1300px; margin: 0 auto; }
h2 { font-size: 16px; margin: 0 0 12px 0; font-weight: 600; }
h2 small {
    color: var(--muted);
    font-weight: 400;
    font-size: 12px;
    margin-left: 8px;
}
.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 18px 20px;
    margin-bottom: 18px;
}
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 12px;
    margin-bottom: 18px;
}
.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px 16px;
}
.card .label {
    color: var(--muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    margin-bottom: 6px;
}
.card .value {
    font-size: 22px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}
.card .unit { color: var(--muted); font-size: 12px; margin-left: 4px; }
table {
    width: 100%;
    border-collapse: collapse;
    font-variant-numeric: tabular-nums;
    font-size: 13px;
}
th, td {
    padding: 7px 10px;
    text-align: right;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
th:first-child, td:first-child { text-align: left; }
th {
    background: var(--panel-2);
    color: var(--muted);
    font-weight: 500;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: sticky;
    top: 0;
}
tbody tr:hover { background: var(--panel-2); }
.pos { color: var(--pos); }
.neg { color: var(--neg); }
.warn { color: var(--warn); }
.table-wrap { overflow-x: auto; }
.note {
    color: var(--muted);
    font-size: 12px;
    margin-top: 8px;
    line-height: 1.5;
}
footer {
    text-align: center;
    color: var(--muted);
    font-size: 12px;
    padding: 24px 0;
}
footer a { color: var(--muted); }

/* Contact form */
.form-wrap { max-width: 640px; }
.form-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 14px;
}
.form-row label {
    font-size: 12px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.form-row input,
.form-row textarea {
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    padding: 10px 12px;
    font-family: inherit;
    font-size: 14px;
    transition: border-color 0.15s, background 0.15s;
}
.form-row input:focus,
.form-row textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: #1c2230;
}
.form-row textarea { resize: vertical; min-height: 120px; }
.form-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 6px;
}
button.primary {
    background: var(--accent);
    color: #0f1115;
    border: 0;
    padding: 10px 22px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: filter 0.15s;
}
button.primary:hover { filter: brightness(1.1); }
.honey { position: absolute; left: -10000px; height: 0; width: 0;
         overflow: hidden; }

/* Scatter plots (Chart.js canvases) */
.scatter-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 18px;
    align-items: start;
}
@media (max-width: 720px) {
    .scatter-wrap { grid-template-columns: 1fr; }
}
.scatter-canvas-wrap {
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 10px;
    position: relative;
    height: 340px;
}
.scatter-wrap .scatter-stats {
    color: var(--muted);
    font-size: 12px;
    line-height: 1.55;
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 12px 14px;
}
.scatter-wrap .scatter-stats strong { color: var(--text); }

/* Per-region snapshot grid on the EIA Weekly page */
.region-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 12px;
}
.card.region-card {
    padding: 14px 16px 16px 16px;
}
.region-card-title {
    font-weight: 600;
    font-size: 14px;
    color: var(--text);
    margin-bottom: 2px;
}
.region-card-stats {
    color: var(--muted);
    font-size: 11px;
    margin-bottom: 10px;
}
table.region-mini {
    width: 100%;
    font-size: 12px;
}
table.region-mini th {
    font-size: 10px;
    padding: 4px 6px;
}
table.region-mini td {
    padding: 4px 6px;
}

/* Weekly fit-vs-actual grid on eia.html. Three sub-columns per region
   (Fit / Actual / Err); add a vertical divider every 3 cells to visually
   group them. The "total-group" class lifts the TOTAL columns on the
   right with a slightly brighter background. */
table.fit-grid {
    font-size: 12px;
}
table.fit-grid thead tr:first-child th {
    text-align: center;
    border-bottom: 1px solid var(--border);
    background: var(--panel-2);
}
table.fit-grid thead tr:nth-child(2) th {
    font-size: 10px;
    padding: 4px 8px;
    text-align: right;
}
table.fit-grid th:first-child {
    text-align: left;
}
table.fit-grid td {
    padding: 4px 8px;
}
/* Subtle divider between region groups: every 3rd data column (starting
   from col 2 since col 1 is the week label) gets a left border. */
table.fit-grid td:nth-child(3n+1),
table.fit-grid thead tr:nth-child(2) th:nth-child(3n+1) {
    border-left: 1px solid var(--border);
}
table.fit-grid td.total-group {
    background: rgba(78, 161, 255, 0.06);
}
table.fit-grid .nowrap { white-space: nowrap; }

/* Demand-page monthly grouped columns - the right-side L48 group
   (Fit/Actual/Err) is highlighted so the actual+error pop. */
.actual-group {
    background: rgba(78, 161, 255, 0.06);
}
th.actual-group {
    text-align: center;
    background: var(--panel-2);
    border-bottom: 1px solid var(--border);
}

/* Demand-page tabs (Total / Power / ResComm / Industrial). */
.demand-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 14px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0;
}
.demand-tab {
    background: transparent;
    color: var(--muted);
    border: none;
    border-bottom: 2px solid transparent;
    padding: 8px 14px;
    margin-bottom: -1px;
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s;
}
.demand-tab:hover { color: var(--text); }
.demand-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
    font-weight: 600;
}