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

:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --success: #059669;
    --success-hover: #047857;
    --danger: #dc2626;
    --warning: #d97706;
    --bg: #f1f5f9;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-secondary: #64748b;
    --sidebar-bg: #1e293b;
    --sidebar-text: #cbd5e1;
    --sidebar-active: #4f46e5;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.login-card h1 {
    font-size: 22px;
    text-align: center;
    color: var(--text);
    margin-bottom: 4px;
}

.subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 28px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}

.form-group input {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.2s;
    outline: none;
}

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

.error-msg {
    color: var(--danger);
    font-size: 13px;
    min-height: 20px;
    margin-bottom: 8px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
}

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

.btn-success:hover:not(:disabled) {
    background: var(--success-hover);
}

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

.btn-sm {
    padding: 5px 12px;
    font-size: 13px;
}

.btn-xs {
    padding: 3px 10px;
    font-size: 12px;
}

.btn-block {
    width: 100%;
    padding: 12px;
    font-size: 15px;
}

/* Topbar */
.topbar {
    background: #fff;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 56px;
}

.logo {
    font-size: 17px;
    font-weight: 700;
    color: var(--primary);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-info {
    font-size: 13px;
    color: var(--text-secondary);
}

/* Main Container */
.main-container {
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    min-height: calc(100vh - 56px);
}

/* Sidebar */
.sidebar {
    width: 200px;
    background: var(--sidebar-bg);
    padding: 16px 0;
    flex-shrink: 0;
}

.nav-item {
    display: block;
    padding: 10px 24px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(255,255,255,0.05);
}

.nav-item.active {
    color: #fff;
    background: rgba(79,70,229,0.3);
    border-left-color: var(--sidebar-active);
}

/* Content */
.content {
    flex: 1;
    padding: 24px;
    overflow-x: auto;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

/* Stats */
.stats-bar {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background: #fff;
    border-radius: 10px;
    padding: 16px 24px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    min-width: 140px;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-value {
    font-size: 26px;
    font-weight: 700;
}

.stat-green { color: var(--success); }
.stat-red { color: var(--danger); }
.stat-warning { color: var(--warning); }

/* Toolbar */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 10px;
}

.toolbar-left, .toolbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.input-search {
    padding: 8px 12px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    width: 220px;
}

.input-search:focus {
    border-color: var(--primary);
}

.input-lg {
    width: 400px;
    padding: 10px 14px;
    font-size: 15px;
}

.select-filter {
    padding: 8px 12px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    background: #fff;
    cursor: pointer;
}

.selected-hint {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Table */
.table-wrap {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.data-table th {
    background: #f8fafc;
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}

.data-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.data-table tbody tr:hover {
    background: #f8fafc;
}

.loading-td {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px !important;
}

.title-cell {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Status Badge */
.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 20px;
}

.page-btn {
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #fff;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}

.page-btn:hover:not(.active):not(:disabled) {
    border-color: var(--primary);
    color: var(--primary);
}

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

.page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Search Test */
.search-test-card {
    background: #fff;
    border-radius: 10px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.search-test-card h2 {
    font-size: 18px;
    margin-bottom: 6px;
}

.desc {
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 20px;
}

.search-test-form {
    margin-bottom: 20px;
}

.form-row {
    display: flex;
    gap: 10px;
    align-items: center;
}

.placeholder-text {
    color: var(--text-secondary);
    text-align: center;
    padding: 40px;
    font-size: 14px;
}

/* Search Results */
.search-result-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 8px;
    gap: 16px;
    transition: background 0.2s;
}

.search-result-item:hover {
    background: #f8fafc;
}

.result-score {
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    min-width: 60px;
    text-align: center;
}

.result-info {
    flex: 1;
    min-width: 0;
}

.result-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.result-keyword {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.result-intro {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.result-thumb {
    width: 60px;
    height: 60px;
    border-radius: 6px;
    object-fit: cover;
    background: #f1f5f9;
    flex-shrink: 0;
}

.no-results {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px;
    font-size: 14px;
}

/* Toast */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 24px;
    border-radius: 8px;
    color: #fff;
    font-size: 14px;
    z-index: 9999;
    display: none;
    animation: slideIn 0.3s ease;
}

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

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Intro modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-content h3 {
    margin-bottom: 12px;
}

.modal-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.modal-close {
    float: right;
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .main-container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        display: flex;
        padding: 0;
    }
    .nav-item {
        flex: 1;
        text-align: center;
        border-left: none;
        border-bottom: 3px solid transparent;
    }
    .nav-item.active {
        border-left: none;
        border-bottom-color: var(--sidebar-active);
    }
    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }
    .toolbar-left, .toolbar-right {
        flex-wrap: wrap;
    }
    .input-lg {
        width: 100%;
    }
    .form-row {
        flex-wrap: wrap;
    }
}