/* ========== CSS 变量（主题色） ========== */
:root {
    --bg-start: #e0f2fe;
    --bg-end: #f0e7ff;
    --bg-solid: #e0f2fe;
    --glass-bg: rgba(255, 255, 255, 0.65);
    --glass-border: rgba(255, 255, 255, 0.7);
    --glass-hover: rgba(255, 255, 255, 0.8);
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --text-hint: #666;
    --input-bg: rgba(255, 255, 255, 0.8);
    --input-border: rgba(203, 213, 225, 0.6);
    --day-empty-bg: rgba(248, 250, 252, 0.7);
    --day-empty-color: #b8c2ce;
    --day-work-bg: rgba(219, 234, 254, 0.75);
    --day-work-color: #1d4ed8;
    --day-rest-bg: rgba(220, 252, 231, 0.75);
    --day-rest-color: #16a34a;
    --day-leave-bg: rgba(254, 226, 230, 0.75);
    --day-leave-color: #dc2626;
    --tab-bg: rgba(255, 255, 255, 0.8);
    --tab-inactive: #64748b;
    --title-bg: rgba(255, 255, 255, 0.78);
    --card-sub-bg: rgba(255, 255, 255, 0.5);
    --shadow: rgba(31, 38, 135, 0.1);
    --modal-bg: rgba(255, 255, 255, 0.95);
    --detail-bg: rgba(255, 255, 255, 0.92);
    --border-light: rgba(222, 226, 230, 0.5);
    --error-bg: #fef2f2;
    --error-border: #fecaca;
    --error-text: #991b1b;
    --primary: #2563eb;
    --primary-light: #3b82f6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --purple: #9333ea;
}

[data-theme="dark"] {
    --bg-start: #0f172a;
    --bg-end: #1e293b;
    --bg-solid: #0f172a;
    --glass-bg: rgba(30, 41, 59, 0.65);
    --glass-border: rgba(71, 85, 105, 0.5);
    --glass-hover: rgba(30, 41, 59, 0.8);
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-hint: #94a3b8;
    --input-bg: rgba(30, 41, 59, 0.8);
    --input-border: rgba(71, 85, 105, 0.6);
    --day-empty-bg: rgba(30, 41, 59, 0.5);
    --day-empty-color: #64748b;
    --day-work-bg: rgba(30, 58, 138, 0.45);
    --day-work-color: #93c5fd;
    --day-rest-bg: rgba(20, 83, 45, 0.35);
    --day-rest-color: #86efac;
    --day-leave-bg: rgba(127, 29, 29, 0.35);
    --day-leave-color: #fca5a5;
    --tab-bg: rgba(30, 41, 59, 0.8);
    --tab-inactive: #94a3b8;
    --title-bg: rgba(15, 23, 42, 0.85);
    --card-sub-bg: rgba(30, 41, 59, 0.5);
    --shadow: rgba(0, 0, 0, 0.3);
    --modal-bg: rgba(30, 41, 59, 0.95);
    --detail-bg: rgba(30, 41, 59, 0.92);
    --border-light: rgba(71, 85, 105, 0.3);
    --error-bg: rgba(127, 29, 29, 0.3);
    --error-border: rgba(220, 38, 38, 0.4);
    --error-text: #fca5a5;
}