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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: #f0f2f5;
    color: #333;
    min-height: 100vh;
}

/* Navbar */
.navbar {
    background: #1a1a2e;
    color: #fff;
    padding: 0 16px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    height: 56px;
    flex-wrap: wrap;
}

.nav-brand {
    color: #fff;
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    margin-left: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
}

.nav-link {
    color: #ccc;
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 14px;
    white-space: nowrap;
    transition: background 0.2s, color 0.2s;
}

.nav-link:hover {
    background: rgba(255,255,255,0.12);
    color: #fff;
}

.nav-active, .nav-link.nav-active {
    background: rgba(74,108,247,0.35);
    color: #fff;
    font-weight: 600;
}

.nav-user {
    color: #aaa;
    font-size: 14px;
    padding: 0 12px;
    white-space: nowrap;
}

.product-switcher {
    margin-left: 12px;
}

.product-switcher select option {
    color: #333;
    background: #fff;
}

@media (max-width: 768px) {
    .product-switcher {
        margin: 6px 0;
        width: 100%;
    }
    .product-switcher select {
        width: 100%;
    }
}

.nav-logout {
    color: #ff6b6b;
}

/* Container */
.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 20px 16px;
}

/* Card */
.card {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    padding: 24px;
    margin-bottom: 20px;
}

.card h2 {
    font-size: 20px;
    margin-bottom: 16px;
    color: #1a1a2e;
}

/* Tables */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    position: relative;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 14px;
    min-width: 700px;
}

th, td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid #eee;
    white-space: nowrap;
}

th {
    background: #f8f9fa;
    font-weight: 600;
    color: #555;
}

tr:hover td {
    background: #f5f5f5;
}

th:last-child,
td:last-child {
    position: sticky;
    right: 0;
    z-index: 2;
}

th:last-child {
    background: #f8f9fa;
    box-shadow: -4px 0 8px rgba(0,0,0,0.06);
}

td:last-child {
    background: #fff;
}

tr:hover td:last-child {
    background: #f5f5f5;
}

/* Forms */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 14px;
    color: #555;
}

.form-control {
    width: 100%;
    max-width: 500px;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: #4a6cf7;
    box-shadow: 0 0 0 3px rgba(74,108,247,0.15);
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

select.form-control {
    max-width: 300px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s, opacity 0.2s;
}

.btn:hover {
    opacity: 0.9;
}

.btn-primary {
    background: #4a6cf7;
    color: #fff;
}

.btn-success {
    background: #22c55e;
    color: #fff;
}

.btn-danger {
    background: #ef4444;
    color: #fff;
}

.btn-warning {
    background: #f59e0b;
    color: #fff;
}

.btn-default {
    background: #fff;
    color: #666;
    border: 1px solid #ddd;
}

.btn-default:hover {
    background: #f5f5f5;
}

.btn-info {
    background: #3b82f6;
    color: #fff;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

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

.badge-success {
    background: #dcfce7;
    color: #166534;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-info {
    background: #dbeafe;
    color: #1e40af;
}

.badge-secondary {
    background: #e2e8f0;
    color: #475569;
}

/* Alert */
.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 14px;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-danger {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fde68a;
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

/* Auth pages */
.auth-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #f0f2f5;
}

.auth-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    padding: 32px;
    width: 100%;
    max-width: 400px;
}

.auth-card h1 {
    text-align: center;
    margin-bottom: 24px;
    font-size: 24px;
    color: #1a1a2e;
}

.auth-card .form-control {
    max-width: 100%;
}

.auth-card .btn {
    width: 100%;
}

.auth-card .captcha-row {
    display: flex;
    gap: 10px;
    align-items: center;
}

.auth-card .captcha-row .form-control {
    flex: 1;
}

.auth-card .captcha-row img {
    border-radius: 6px;
    cursor: pointer;
    height: 42px;
}

.auth-footer {
    text-align: center;
    margin-top: 16px;
    font-size: 14px;
    color: #777;
}

.auth-footer a {
    color: #4a6cf7;
    text-decoration: none;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.pagination a, .pagination span:not(.page-jump span) {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 14px;
    text-decoration: none;
    color: #4a6cf7;
    background: #fff;
    border: 1px solid #ddd;
}

.pagination .active {
    background: #4a6cf7;
    color: #fff;
    border-color: #4a6cf7;
}

.pagination a:hover {
    background: #eef2ff;
}

.pagination span.disabled {
    color: #bbb;
    background: #f9f9f9;
    border-color: #eee;
    cursor: not-allowed;
}

.pagination span.ellipsis {
    border: none;
    color: #999;
    background: transparent;
    padding: 6px 4px;
}

.pagination .page-jump {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-left: 8px;
    font-size: 13px;
    color: #666;
}

.pagination .page-jump input[type="number"] {
    width: 60px;
    padding: 5px 6px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 13px;
    text-align: center;
}

.pagination .page-jump button {
    padding: 5px 10px;
    border: 1px solid #4a6cf7;
    border-radius: 4px;
    background: #4a6cf7;
    color: #fff;
    cursor: pointer;
    font-size: 13px;
}

.pagination .page-jump button:hover {
    background: #3b5de7;
}

/* Stats grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background: #fff;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    text-align: center;
}

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 700;
    color: #1a1a2e;
}

.stat-card .stat-label {
    font-size: 14px;
    color: #777;
    margin-top: 4px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 200;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-content h3 {
    margin-bottom: 16px;
}

.modal-close {
    float: right;
    font-size: 24px;
    cursor: pointer;
    color: #999;
}

/* Action buttons group */
.action-group {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

/* File input */
.form-control-file {
    max-width: 500px;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        display: none;
        width: 100%;
        flex-direction: column;
        padding: 8px 0 16px;
        gap: 2px;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-link, .nav-user {
        width: 100%;
        padding: 10px 12px;
    }

    .card {
        padding: 16px;
    }

    th, td {
        padding: 8px 10px;
        font-size: 13px;
    }

    .auth-card {
        margin: 16px;
        padding: 24px;
    }

    .action-group {
        flex-direction: column;
    }

    .action-group .btn-sm {
        width: 100%;
        text-align: center;
    }
}