:root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #8b949e;
    --border: #30363d;
    --card-bg: #161b22;
    --low: #2ea043;
    --medium: #d4a72c;
    --high: #db6d28;
    --peak: #cf222e;
    --closed: #484f58;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--fg);
    line-height: 1.5;
    overflow-x: hidden;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

header {
    padding: 1.5rem 1rem;
    border-bottom: 1px solid var(--border);
}

header h1 { margin: 0 0 0.25rem; font-size: 1.5rem; }
header p { margin: 0; color: var(--muted); font-size: 0.9rem; }

#staleness-banner {
    margin-top: 0.75rem;
    padding: 0.5rem 0.75rem;
    background: #d4a72c;
    color: #0d1117;
    border-radius: 4px;
    font-size: 0.85rem;
}
.hidden { display: none; }

section {
    padding: 1.5rem 1rem;
    border-bottom: 1px solid var(--border);
}
section h2 { margin: 0 0 1rem; font-size: 1.1rem; color: var(--muted); }

#cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}
@media (min-width: 900px) {
    #cards { grid-template-columns: repeat(6, 1fr); }
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.75rem;
    text-align: center;
}
.card .gym-name { font-size: 0.85rem; color: var(--muted); margin-bottom: 0.25rem; }
.card .pct { font-size: 1.8rem; font-weight: 600; }
.card .meta { font-size: 0.8rem; color: var(--muted); }
.card .delta-up { color: var(--peak); }
.card .delta-down { color: var(--low); }

.card.level-low .pct { color: var(--low); }
.card.level-medium .pct { color: var(--medium); }
.card.level-high .pct { color: var(--high); }
.card.level-peak .pct { color: var(--peak); }
.card.level-closed { opacity: 0.55; }
.card.level-closed .pct { color: var(--closed); }

.chart-wrapper {
    position: relative;
    width: 100%;
    height: 320px;
}
@media (max-width: 600px) {
    .chart-wrapper { height: 380px; }
}
#today-chart { width: 100% !important; height: 100% !important; }

.chart-tooltip {
    margin-top: 0.75rem;
    padding: 0.5rem 0.75rem;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.8rem;
    min-height: 2.75rem;
    visibility: hidden;
}
.chart-tooltip.visible { visibility: visible; }
.chart-tooltip .tt-title {
    color: var(--muted);
    font-size: 0.75rem;
    margin-bottom: 0.3rem;
}
.chart-tooltip .tt-rows {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem 0.9rem;
}
.chart-tooltip .tt-row {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}
.chart-tooltip .tt-dot {
    width: 0.55rem;
    height: 0.55rem;
    border-radius: 50%;
    display: inline-block;
    flex-shrink: 0;
}

#gym-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}
#gym-selector button {
    background: var(--card-bg);
    color: var(--fg);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.35rem 0.7rem;
    cursor: pointer;
    font-size: 0.85rem;
}
#gym-selector button.active {
    border-color: var(--fg);
    background: var(--border);
}

#heatmap {
    display: grid;
    grid-template-columns: 3rem repeat(7, 1fr);
    gap: 2px;
    font-size: 0.7rem;
}
.hm-label {
    color: var(--muted);
    padding: 0.25rem;
    text-align: center;
    min-width: 0;
    overflow: hidden;
}
.hm-cell {
    aspect-ratio: 2 / 1;
    border-radius: 2px;
    min-height: 14px;
    min-width: 0;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 600;
    color: #f0f6fc;
    text-shadow: 0 0 2px rgba(0, 0, 0, 0.6);
    line-height: 1;
}
@media (max-width: 600px) {
    #heatmap {
        grid-template-columns: 2rem repeat(7, 1fr);
        font-size: 0.6rem;
    }
    .hm-cell { font-size: 0.55rem; }
}

#peaks-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
#peaks-table th, #peaks-table td {
    padding: 0.5rem 0.6rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
#peaks-table th { color: var(--muted); font-weight: 500; }

footer { padding: 1rem; color: var(--muted); font-size: 0.8rem; text-align: center; }
footer a { color: var(--muted); }