/**
 * LinkMaster - 全局样式
 * 简洁清爽的现代设计风格
 */

:root {
    --primary: #1a6fd4;
    --primary-hover: #1558ad;
    --primary-soft: rgba(26, 111, 212, 0.1);
    --success: #0d8a5b;
    --success-soft: rgba(13, 138, 91, 0.1);
    --danger: #dc2626;
    --danger-soft: rgba(220, 38, 38, 0.1);
    --warning: #d97706;
    --warning-soft: rgba(217, 119, 6, 0.1);
    
    --bg: #f8fafc;
    --bg-deep: #e8edf3;
    --surface: #ffffff;
    --border: #e2e8f0;
    --text: #1a2332;
    --text-secondary: #5a6b82;
    --text-muted: #94a3b8;
    
    --radius: 10px;
    --radius-sm: 6px;
    --radius-lg: 14px;
    --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 4px 14px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 4px 6px rgba(15, 23, 42, 0.1), 0 10px 30px rgba(15, 23, 42, 0.1);
    
    --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
    --transition: 0.2s ease;
}

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

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* 通用布局 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部导航 */
.header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.brand svg { width: 32px; height: 32px; }

.nav { display: flex; align-items: center; gap: 8px; }

.nav a {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all var(--transition);
}

.nav a:hover, .nav a.active {
    background: var(--primary-soft);
    color: var(--primary);
}

.user-menu {
    position: relative;
}

.user-avatar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background var(--transition);
}

.user-avatar:hover { background: var(--bg); }

.dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    display: none;
    overflow: hidden;
}

.dropdown.show { display: block; }

.dropdown a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    color: var(--text);
    text-decoration: none;
    transition: background var(--transition);
}

.dropdown a:hover { background: var(--bg); }
.dropdown a.danger { color: var(--danger); }

/* 主内容区 */
.main { padding: 30px 0; min-height: calc(100vh - 64px); }

.page-header {
    margin-bottom: 30px;
}

.page-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}

.page-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* 卡片 */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
}

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

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.card-body { padding: 24px; }

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.stat-icon.blue { background: var(--primary-soft); color: var(--primary); }
.stat-icon.green { background: var(--success-soft); color: var(--success); }
.stat-icon.orange { background: var(--warning-soft); color: var(--warning); }
.stat-icon.red { background: var(--danger-soft); color: var(--danger); }

.stat-info h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.stat-info p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition);
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(26, 111, 212, 0.3);
}

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { filter: brightness(1.1); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { filter: brightness(1.1); }

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: var(--bg);
    color: var(--text);
}

.btn-sm { padding: 6px 12px; font-size: 0.8rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }

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

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

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    transition: border-color var(--transition);
    background: var(--surface);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-soft);
}

.form-input::placeholder { color: var(--text-muted); }

.form-hint {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 6px;
}

.form-error {
    font-size: 0.8rem;
    color: var(--danger);
    margin-top: 6px;
}

textarea.form-input { min-height: 120px; resize: vertical; }

select.form-input {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%235a6b82' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* 表格 */
.table-wrapper {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th, .table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.table th {
    background: var(--bg);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tr:hover { background: var(--bg); }

.table td { font-size: 0.9rem; }

/* 徽章 */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success { background: var(--success-soft); color: var(--success); }
.badge-warning { background: var(--warning-soft); color: var(--warning); }
.badge-danger { background: var(--danger-soft); color: var(--danger); }
.badge-primary { background: var(--primary-soft); color: var(--primary); }
.badge-gray { background: var(--bg); color: var(--text-secondary); }

/* 切换开关 */
.switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 26px;
}

.switch input { opacity: 0; width: 0; height: 0; }

.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--border);
    border-radius: 26px;
    transition: var(--transition);
}

.slider:before {
    content: "";
    position: absolute;
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background: var(--surface);
    border-radius: 50%;
    transition: var(--transition);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

input:checked + .slider { background: var(--primary); }
input:checked + .slider:before { transform: translateX(22px); }

/* 分页 */
.pagination {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
    margin-top: 24px;
}

.pagination a, .pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 12px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    text-decoration: none;
    color: var(--text-secondary);
    background: var(--surface);
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination a.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 提示框 */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.alert-success { background: var(--success-soft); color: var(--success); }
.alert-danger { background: var(--danger-soft); color: var(--danger); }
.alert-warning { background: var(--warning-soft); color: var(--warning); }
.alert-info { background: var(--primary-soft); color: var(--primary); }

/* 模态框 */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--surface);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow: auto;
    transform: scale(0.9);
    transition: transform var(--transition);
}

.modal-overlay.show .modal { transform: scale(1); }

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

.modal-title { font-size: 1.1rem; font-weight: 600; }

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition);
}

.modal-close:hover { background: var(--bg); color: var(--text); }

.modal-body { padding: 24px; }

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* 标签页 */
.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
}

.tab {
    padding: 12px 20px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    position: relative;
    transition: color var(--transition);
}

.tab:hover { color: var(--text); }

.tab.active {
    color: var(--primary);
}

.tab.active::after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--text);
}

/* 操作按钮组 */
.action-group {
    display: flex;
    gap: 8px;
}

/* 列表项 */
.list-item {
    display: flex;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}

.list-item:hover { background: var(--bg); }
.list-item:last-child { border-bottom: none; }

/* 复选框 */
.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox input {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* 搜索框 */
.search-box {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px 14px;
}

.search-box input {
    border: none;
    background: transparent;
    flex: 1;
    font-size: 0.9rem;
    outline: none;
}

/* 二维码卡片 */
.qr-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
}

.qr-card img {
    width: 100%;
    max-width: 200px;
    margin-bottom: 12px;
}

.qr-card-url {
    font-size: 0.8rem;
    color: var(--text-secondary);
    word-break: break-all;
    margin-bottom: 12px;
}

/* 响应式 */
@media (max-width: 768px) {
    .header-inner { padding: 0 16px; }
    .nav a { padding: 8px 12px; }
    .container { padding: 0 16px; }
    .stats-grid { grid-template-columns: 1fr; }
    .card-body { padding: 16px; }
    .table th, .table td { padding: 10px 12px; }
}

/* 工具类 */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-secondary); }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.font-bold { font-weight: 700; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.hidden { display: none !important; }