/* =============================================
   懒惰虫考勤系统 - 全局设计系统
   版本: 2.0
   ============================================= */

:root {
    /* 主色 - 渐变蓝紫 */
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --primary-50: #eef2ff;
    --primary-100: #e0e7ff;
    --primary-200: #c7d2fe;

    /* 辅色 */
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --info: #3b82f6;
    --info-light: #dbeafe;

    /* 中性色 */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --gray-950: #020617;

    /* 表面 */
    --surface: #ffffff;
    --surface-elevated: #ffffff;
    --surface-hover: #f8fafc;
    --surface-active: #f1f5f9;

    /* 圆角 */
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    /* 阴影 */
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.15);

    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;

    /* 过渡 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* =============================================
   基础重置
   ============================================= */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--gray-50);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

/* =============================================
   卡片系统
   ============================================= */
.card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition), border-color var(--transition);
    margin-bottom: 20px;
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow);
    border-color: var(--gray-300);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-100);
    flex-wrap: wrap;
    gap: 12px;
}

.card-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    letter-spacing: -0.01em;
}

.card-body {
    padding: 24px;
}

/* =============================================
   统计卡片
   ============================================= */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

.stat-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    padding: 20px 24px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    opacity: 0;
    transition: opacity var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-200);
    transform: translateY(-2px);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-card h4 {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--gray-500);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-card .value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 4px;
}

.stat-card .change {
    font-size: 0.8rem;
    color: var(--gray-400);
}

.stat-card .change.positive {
    color: var(--success);
}

.stat-card .change.negative {
    color: var(--danger);
}

/* =============================================
   按钮系统
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    text-decoration: none;
    transition: all var(--transition);
    white-space: nowrap;
    line-height: 1.4;
    position: relative;
    overflow: hidden;
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 1px 3px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
    color: white;
    transform: translateY(-1px);
}

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

.btn-success:hover {
    background: #059669;
    color: white;
}

.btn-warning {
    background: var(--warning);
    color: white;
}

.btn-warning:hover {
    background: #d97706;
    color: white;
}

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

.btn-danger:hover {
    background: #dc2626;
    color: white;
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
}

.btn-secondary:hover {
    background: var(--gray-200);
    color: var(--gray-800);
}

.btn-ghost {
    background: transparent;
    color: var(--gray-600);
}

.btn-ghost:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
    border-radius: var(--radius-lg);
}

/* =============================================
   表单系统
   ============================================= */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--gray-700);
    font-size: 0.875rem;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-family: inherit;
    color: var(--gray-800);
    background: var(--surface);
    transition: all var(--transition);
    line-height: 1.5;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-control::placeholder {
    color: var(--gray-400);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 12px center;
    background-repeat: no-repeat;
    background-size: 16px;
    padding-right: 40px;
}

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

.help-text {
    margin-top: 6px;
    font-size: 0.8rem;
    color: var(--gray-400);
}

/* =============================================
   表格系统
   ============================================= */
.table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-600);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
    white-space: nowrap;
}

.table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--gray-100);
    font-size: 0.875rem;
    color: var(--gray-700);
    vertical-align: middle;
}

.table tbody tr {
    transition: background var(--transition-fast);
}

.table tbody tr:hover {
    background: var(--gray-50);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* =============================================
   徽章
   ============================================= */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

.badge-success {
    background: var(--success-light);
    color: #065f46;
}

.badge-warning {
    background: var(--warning-light);
    color: #92400e;
}

.badge-danger {
    background: var(--danger-light);
    color: #991b1b;
}

.badge-info {
    background: var(--info-light);
    color: #1e40af;
}

.badge-secondary {
    background: var(--gray-100);
    color: var(--gray-600);
}

/* =============================================
   模态框
   ============================================= */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(4px);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal.show {
    display: flex;
    animation: modalFadeIn 200ms ease-out;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--surface);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 520px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-100);
}

.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-900);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    color: var(--gray-400);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--gray-100);
    color: var(--gray-700);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 16px 24px;
    border-top: 1px solid var(--gray-100);
}

/* =============================================
   过滤表单
   ============================================= */
.filter-form {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: flex-end;
}

.filter-group {
    flex: 1;
    min-width: 160px;
}

@media (max-width: 576px) {
    .filter-form {
        flex-direction: column;
    }
    .filter-group {
        min-width: 100%;
    }
    .form-control {
        font-size: 16px;
    }
}

/* =============================================
   分页
   ============================================= */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-top: 24px;
    padding: 20px 0;
}

.page-info {
    color: var(--gray-500);
    font-size: 0.85rem;
}

/* =============================================
   工具类
   ============================================= */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--gray-400); }
.font-mono { font-family: var(--font-mono); }

/* =============================================
   响应式
   ============================================= */
@media (max-width: 768px) {
    .table {
        font-size: 0.8rem;
    }
    .table th, .table td {
        padding: 10px 12px;
    }
    .card-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .card-actions {
        width: 100%;
    }
}

@media (max-width: 576px) {
    .btn {
        width: 100%;
        justify-content: center;
    }
    .btn-sm {
        width: auto;
    }
    .modal-content {
        width: 100%;
        max-height: 100vh;
        border-radius: var(--radius-lg);
    }
}

/* =============================================
   滚动条美化
   ============================================= */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* =============================================
   选择高亮
   ============================================= */
::selection {
    background: var(--primary-200);
    color: var(--gray-900);
}