/* 系统设置 → 使用记录 (boss only). Phone-first; one series, so one hue and no legend. */

#systemSettingsUsageSection {
    --usage-ink: var(--classic-text, #1f2937);
    --usage-soft: var(--classic-text-soft, #5f6b7a);
    --usage-faint: var(--classic-text-faint, #94a3b8);
    --usage-line: var(--classic-line, #e2e8f0);
    --usage-panel: var(--classic-surface-muted, #f6f8fb);
    --usage-accent: var(--classic-blue-strong, #1d4ed8);
    --usage-fail: var(--classic-red-strong, #c0262d);
    --usage-fail-soft: var(--classic-red-soft, #fdecec);
    --usage-series: #2a78d6;
    min-width: 0;
}

.usage-muted { margin: 4px 0 0; font-size: 13px; line-height: 1.5; color: var(--usage-soft); }
.usage-subhead { margin: 14px 0 6px; font-size: 14px; font-weight: 800; color: var(--usage-ink); }

/* range chips */
.usage-chips { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; }
.usage-chips::-webkit-scrollbar { display: none; }
.usage-chip { flex: none; min-height: 36px; padding: 0 14px; border-radius: 999px; border: 1px solid var(--usage-line);
    background: #fff; color: var(--usage-ink); font-size: 14px; font-weight: 700; }
.usage-chip.active { background: var(--usage-accent); border-color: var(--usage-accent); color: #fff; }
.usage-chip:focus-visible, .usage-person:focus-visible { outline: 2px solid var(--usage-accent); outline-offset: 2px; }

/* notes */
.usage-notes { margin: 6px 0 0; padding-left: 18px; display: grid; gap: 6px; font-size: 14px; line-height: 1.5; color: var(--usage-ink); }

/* people */
.usage-people { display: grid; gap: 8px; margin-top: 10px; }
.usage-person { display: grid; gap: 6px; width: 100%; padding: 12px; border: 1px solid var(--usage-line); border-radius: 12px;
    background: #fff; text-align: left; color: var(--usage-ink); font: inherit; cursor: pointer; min-width: 0; }
.usage-person:hover { border-color: var(--classic-line-strong, #cbd5e1); }
.usage-person-idle { background: var(--usage-panel); }
.usage-person-head { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; font-size: 15px; }
.usage-role { font-size: 12px; color: var(--usage-soft); }
.usage-last { margin-left: auto; font-size: 12px; color: var(--usage-soft); font-variant-numeric: tabular-nums; }
.usage-stats { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 13px; color: var(--usage-soft); }
.usage-stats b { color: var(--usage-ink); font-size: 15px; font-variant-numeric: tabular-nums; }
.usage-line { font-size: 13px; line-height: 1.5; color: var(--usage-ink); overflow-wrap: anywhere; }
.usage-line-key { display: inline-block; margin-right: 6px; font-size: 12px; color: var(--usage-faint); }
.usage-fail { margin-left: 6px; padding: 1px 6px; border-radius: 999px; background: var(--usage-fail-soft); color: var(--usage-fail);
    font-size: 11px; font-style: normal; font-weight: 700; white-space: nowrap; }

/* hour columns */
.usage-hours { display: grid; grid-template-columns: repeat(24, minmax(0, 1fr)); gap: 2px; margin-top: 10px; align-items: end; }
.usage-hour { display: flex; flex-direction: column; align-items: center; gap: 4px; min-width: 0; }
.usage-hour-bar { display: flex; align-items: flex-end; width: 100%; height: 80px; }
.usage-hour-bar i { display: block; width: 100%; min-height: 2px; border-radius: 4px 4px 0 0; background: var(--usage-series); }
.usage-hour-label { height: 14px; font-size: 10px; color: var(--usage-soft); font-variant-numeric: tabular-nums; }
.usage-table-wrap summary { min-height: 40px; display: flex; align-items: center; cursor: pointer; font-size: 13px; font-weight: 700; color: var(--usage-accent); }
.usage-table { width: 100%; border-collapse: collapse; font-size: 13px; font-variant-numeric: tabular-nums; }
.usage-table th, .usage-table td { padding: 6px 8px; text-align: right; border-bottom: 1px solid var(--usage-line); }
.usage-table th:first-child, .usage-table td:first-child { text-align: left; }
.usage-table th { color: var(--usage-soft); font-weight: 600; }

/* meter rows */
.usage-meters { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 8px; font-size: 14px; color: var(--usage-ink); }
.usage-meters li { display: grid; grid-template-columns: minmax(4.5em, 28%) minmax(0, 1fr) auto; align-items: center; gap: 10px; min-width: 0; }
.usage-meter-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.usage-meter { display: block; height: 8px; border-radius: 4px; background: var(--usage-panel); overflow: hidden; min-width: 0; }
.usage-meter i { display: block; height: 100%; border-radius: 4px; background: var(--usage-series); }
.usage-meter-value { font-size: 13px; color: var(--usage-soft); white-space: nowrap; font-variant-numeric: tabular-nums; }

/* one person */
.usage-person-title { display: flex; align-items: center; gap: 12px; }
.usage-day { margin-top: 12px; }
.usage-day-title { position: sticky; top: 0; z-index: 1; padding: 6px 0; background: var(--classic-surface, #fff);
    font-size: 14px; font-weight: 800; color: var(--usage-ink); }
.usage-events { list-style: none; margin: 0; padding: 0; }
.usage-event { display: grid; grid-template-columns: 3.2em minmax(0, 1fr); gap: 8px; padding: 6px 0; font-size: 14px;
    line-height: 1.45; color: var(--usage-ink); border-bottom: 1px solid var(--usage-line); }
.usage-event-time { color: var(--usage-soft); font-variant-numeric: tabular-nums; }
.usage-event-page .usage-event-text, .usage-event-open .usage-event-text { color: var(--usage-soft); }
.usage-event-failed .usage-event-text { color: var(--usage-fail); }
.usage-area { margin-left: 6px; font-size: 12px; color: var(--usage-faint); }
.usage-visit-mark { display: flex; align-items: center; gap: 8px; margin-top: 10px; padding: 4px 0; font-size: 12px; font-weight: 700; color: var(--usage-accent); }
.usage-visit-mark::after { content: ""; flex: 1; height: 1px; background: var(--usage-line); }
.usage-day .usage-visit-mark:first-child { margin-top: 0; }