/* ========================================
   授权管理系统 - 现代化 UI 样式
   ======================================== */

:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #eef2ff;
    --success: #059669;
    --success-light: #ecfdf5;
    --warning: #d97706;
    --warning-light: #fffbeb;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --danger-light: #fef2f2;
    --info: #2563eb;
    --info-hover: #1d4ed8;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --radius: 10px;
    --radius-sm: 6px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.1), 0 10px 10px rgba(0,0,0,0.04);
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #f0f4ff 0%, #f5f3ff 50%, #fdf2f8 100%);
    background-attachment: fixed;
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
}

/* ========== 容器 ========== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 登录页 ========== */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-box {
    background: white;
    padding: 48px 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 420px;
}

.login-box h1 {
    text-align: center;
    margin-bottom: 12px;
    color: var(--gray-900);
    font-size: 28px;
    font-weight: 700;
}

.login-box h1::after {
    content: '';
    display: block;
    width: 48px;
    height: 3px;
    background: var(--primary);
    margin: 12px auto 0;
    border-radius: 2px;
}

/* ========== 顶部导航 ========== */
.header {
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(229,231,235,0.6);
    padding: 0;
    margin-bottom: 32px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.header h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.header h1::before {
    content: '';
    display: inline-block;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    border-radius: 8px;
}

.nav {
    display: flex;
    gap: 4px;
    background: var(--gray-100);
    padding: 4px;
    border-radius: 10px;
}

.nav a {
    text-decoration: none;
    color: var(--gray-600);
    padding: 8px 18px;
    border-radius: 7px;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}

.nav a:hover {
    color: var(--gray-900);
    background: white;
    box-shadow: var(--shadow-sm);
}

.nav a.active {
    background: white;
    color: var(--primary);
    font-weight: 600;
    box-shadow: var(--shadow);
}

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

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 13px;
    color: var(--gray-700);
    letter-spacing: 0.01em;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--gray-800);
    background: white;
    transition: var(--transition);
    outline: none;
    font-family: inherit;
}

.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
    border-color: var(--gray-300);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

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

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--primary);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 4px 12px rgba(79,70,229,0.3);
}

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

.btn-success:hover {
    background: var(--info-hover);
    box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}

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

.btn-danger:hover {
    background: var(--danger-hover);
    box-shadow: 0 4px 12px rgba(220,38,38,0.3);
}

.btn-outline {
    background: white;
    color: var(--gray-700);
    border: 1.5px solid var(--gray-200);
}

.btn-outline:hover {
    border-color: var(--gray-300);
    background: var(--gray-50);
}

.btn-sm {
    padding: 5px 12px;
    font-size: 12px;
    border-radius: 5px;
}

/* ========== 卡片 ========== */
.card {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-100);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-100);
    background: var(--gray-50);
}

.card-header h2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.3px;
}

/* ========== 表格 ========== */
table {
    width: 100%;
    border-collapse: collapse;
}

table th,
table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--gray-100);
    font-size: 14px;
}

table th {
    background: var(--gray-50);
    font-weight: 600;
    font-size: 12px;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--gray-200);
}

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

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: 20px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.01em;
}

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

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

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

/* ========== 模态框 ========== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    padding: 0;
    border-radius: 14px;
    width: 100%;
    max-width: 540px;
    max-height: 85vh;
    overflow-y: auto;
    margin: 20px;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-content form {
    padding: 24px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-100);
    background: var(--gray-50);
    border-radius: 14px 14px 0 0;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
}

.modal-close {
    background: var(--gray-100);
    border: none;
    font-size: 20px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-500);
    transition: var(--transition);
    line-height: 1;
}

.modal-close:hover {
    background: var(--gray-200);
    color: var(--gray-800);
}

/* ========== 提示框 ========== */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
    font-weight: 500;
    border-left: 4px solid;
}

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

.alert-error {
    background: var(--danger-light);
    color: #991b1b;
    border-left-color: var(--danger);
}

/* ========== 动画 ========== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.97);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ========== 统计卡片 ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background: white;
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-100);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    border-radius: 4px 0 0 4px;
}

.stat-card:nth-child(1)::before { background: var(--primary); }
.stat-card:nth-child(2)::before { background: var(--success); }
.stat-card:nth-child(3)::before { background: var(--warning); }
.stat-card:nth-child(4)::before { background: var(--info); }

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

.stat-card .stat-label {
    font-size: 13px;
    color: var(--gray-500);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.stat-card .stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -1px;
}

/* ========== 空状态 ========== */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--gray-400);
}

.empty-state .empty-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        height: auto;
        padding: 12px 16px;
        gap: 12px;
    }

    .nav {
        flex-wrap: wrap;
        justify-content: center;
        width: 100%;
    }

    .nav a {
        font-size: 12px;
        padding: 6px 12px;
    }

    table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .card-header {
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }

    .card-header .btn {
        width: 100%;
        justify-content: center;
    }

    .modal-content {
        margin: 10px;
        max-height: 90vh;
        border-radius: 12px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .stat-card .stat-value {
        font-size: 24px;
    }
}

/* ========== 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);
}