:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #ca8a04;
    --bg: #f3f4f6;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #e5e7eb;
    --radius: 8px;
}

* {
    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);
    line-height: 1.5;
}

.navbar {
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 56px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.brand {
    font-size: 18px;
    font-weight: 600;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 8px;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: rgba(255,255,255,0.9);
    text-decoration: none;
    padding: 8px 14px;
    border-radius: var(--radius);
    font-size: 14px;
    transition: background 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    background: rgba(255,255,255,0.15);
    color: #fff;
}

.container {
    max-width: 1200px;
    margin: 24px auto;
    padding: 0 24px;
}

h1 {
    font-size: 24px;
    margin: 0 0 16px;
}

h2 {
    font-size: 18px;
    margin: 24px 0 12px;
}

.card {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    padding: 20px;
    margin-bottom: 20px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 4px;
}

input, select, textarea {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-success {
    background: var(--success);
    color: #fff;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 12px;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

th, td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
}

th {
    background: #f9fafb;
    font-weight: 600;
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

tr:hover td {
    background: #f9fafb;
}

.actions {
    display: flex;
    gap: 6px;
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success {
    background: #dcfce7;
    color: var(--success);
}

.badge-muted {
    background: #f3f4f6;
    color: var(--muted);
}

.today-hero {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-radius: var(--radius);
    padding: 22px 24px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(37,99,235,0.25);
}
.today-hero-label {
    font-size: 14px;
    opacity: 0.9;
}
.today-hero-value {
    font-size: 40px;
    font-weight: 800;
    line-height: 1.2;
    margin: 4px 0;
}
.today-hero-sub {
    font-size: 13px;
    opacity: 0.85;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    color: var(--muted);
    font-size: 13px;
    margin-top: 4px;
}

.date-filter {
    display: flex;
    gap: 12px;
    align-items: flex-end;
    flex-wrap: wrap;
}

.quick-range {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    width: 100%;
    margin-bottom: 4px;
}

.quick-range .btn-sm {
    background: var(--bg-soft);
    color: var(--text);
    border: 1px solid var(--border);
    white-space: nowrap;
    flex-shrink: 0;
}

.quick-range .btn-sm:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.empty-tip {
    text-align: center;
    color: var(--muted);
    padding: 40px;
}

.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--text);
    color: #fff;
    padding: 12px 18px;
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    z-index: 200;
}

.toast.show {
    opacity: 1;
}

.toast.error {
    background: var(--danger);
}

.toast.success {
    background: var(--success);
}

.hidden {
    display: none !important;
}

@media (max-width: 640px) {
    body {
        font-size: 15px;
    }
    .navbar {
        flex-direction: column;
        height: auto;
        padding: 10px 12px 8px;
    }
    .brand {
        font-size: 16px;
        margin-bottom: 8px;
        align-self: flex-start;
    }
    .nav-links {
        flex-wrap: nowrap;
        justify-content: flex-start;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        width: 100%;
        padding-bottom: 4px;
    }
    .nav-links a {
        white-space: nowrap;
        flex-shrink: 0;
        padding: 7px 12px;
        font-size: 14px;
    }
    .container {
        margin: 14px auto;
        padding: 0 12px;
    }
    h1 {
        font-size: 20px;
    }
    h2 {
        font-size: 16px;
    }
    .card {
        padding: 14px;
        margin-bottom: 14px;
    }
    .form-grid {
        grid-template-columns: 1fr;
    }
    .date-filter {
        flex-direction: column;
        gap: 10px;
    }
    .date-filter .form-group,
    .date-filter .btn {
        width: 100%;
    }
    .date-filter .btn {
        justify-content: center;
    }
    .toolbar {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }
    .toolbar > * {
        width: 100%;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .quick-range {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 6px;
        overflow-x: visible;
    }
    .quick-range .btn-sm {
        width: 100%;
        justify-content: center;
        flex-shrink: 1;
    }
    th, td {
        padding: 8px 10px;
        font-size: 13px;
    }
}


/* 首页：今日 + 本月 双卡片 */
.hero-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}
.month-hero {
    background: linear-gradient(135deg, #0f9d76, #0b6b52);
    color: #fff;
    border-radius: var(--radius);
    padding: 22px 24px;
    box-shadow: 0 2px 8px rgba(15, 157, 118, 0.25);
}