:root {
    --bg-primary: #FAF6F1;
    --bg-secondary: #FFFFFF;
    --bg-card: #FFFFFF;
    --bg-input: #FDF9F5;
    --bg-hover: #F5EDE3;
    --bg-sidebar: #F7F1EA;
    --border-color: #E8DDD0;
    --border-light: #F0E8DC;
    --text-primary: #3D2B1F;
    --text-secondary: #7A6555;
    --text-muted: #A08E7C;
    --text-light: #C4B5A5;
    --accent: #A0896C;
    --accent-hover: #8B7355;
    --accent-light: #C4B5A5;
    --accent-lighter: #E8DDD0;
    --success: #6B8E5A;
    --success-bg: #F0F5ED;
    --danger: #C4564A;
    --danger-bg: #FDF0EF;
    --warning: #C49A3A;
    --warning-bg: #FDF8ED;
    --info: #6A8EAE;
    --info-bg: #EDF3F8;
    --shadow-sm: 0 1px 3px rgba(61, 43, 31, 0.06);
    --shadow-md: 0 4px 12px rgba(61, 43, 31, 0.08);
    --shadow-lg: 0 8px 24px rgba(61, 43, 31, 0.1);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-hover);
}

.layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 240px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    padding: 24px 0;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-logo {
    padding: 0 20px 24px;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 16px;
}

.sidebar-logo h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.sidebar-logo span {
    font-size: 12px;
    color: var(--text-muted);
}

.sidebar-nav {
    list-style: none;
}

.sidebar-nav li {
    margin: 2px 8px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    transition: all 0.2s;
}

.sidebar-nav a:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.sidebar-nav a.active {
    background: var(--accent);
    color: #fff;
}

.sidebar-nav .nav-icon {
    width: 20px;
    text-align: center;
    font-size: 16px;
}

.sidebar-section {
    padding: 16px 20px 6px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-light);
}

.main-content {
    flex: 1;
    margin-left: 240px;
    padding: 32px;
    max-width: 1200px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
}

.page-header h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.page-header p {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 4px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    margin-bottom: 20px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-light);
}

.card-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.stat-card .stat-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    margin-bottom: 12px;
}

.stat-card .stat-icon.brown {
    background: var(--accent-lighter);
    color: var(--accent);
}

.stat-card .stat-icon.green {
    background: var(--success-bg);
    color: var(--success);
}

.stat-card .stat-icon.red {
    background: var(--danger-bg);
    color: var(--danger);
}

.stat-card .stat-icon.blue {
    background: var(--info-bg);
    color: var(--info);
}

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-card .stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    line-height: 1.5;
}

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

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

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

.btn-secondary:hover {
    background: var(--accent-lighter);
    color: var(--text-primary);
}

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

.btn-danger:hover {
    background: #B04A3E;
    color: #fff;
}

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

.btn-success:hover {
    background: #5A7D4A;
    color: #fff;
}

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

.btn-lg {
    padding: 12px 28px;
    font-size: 16px;
}

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

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

table th {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--bg-input);
}

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

.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

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

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

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

.badge-info {
    background: var(--info-bg);
    color: var(--info);
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-group .form-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
input[type="url"],
select,
textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-input);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(160, 137, 108, 0.15);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.alert {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    margin-bottom: 20px;
    border: 1px solid transparent;
}

.alert-success {
    background: var(--success-bg);
    color: var(--success);
    border-color: #D5E5CC;
}

.alert-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: #ECC7C4;
}

.alert-warning {
    background: var(--warning-bg);
    color: var(--warning);
    border-color: #E8D9A8;
}

.alert-info {
    background: var(--info-bg);
    color: var(--info);
    border-color: #C5D8E8;
}

.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    padding: 20px;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 40px;
    width: 100%;
    max-width: 420px;
}

.auth-card .logo {
    text-align: center;
    margin-bottom: 32px;
}

.auth-card .logo h1 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
}

.auth-card .logo p {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 4px;
}

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

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

.auth-card .auth-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
    color: var(--text-muted);
}

.key-display {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 13px;
    color: var(--text-primary);
    word-break: break-all;
}

.key-display .copy-btn {
    flex-shrink: 0;
    padding: 4px 10px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    white-space: nowrap;
}

.key-display .copy-btn:hover {
    background: var(--accent-hover);
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(61, 43, 31, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 28px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

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

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    margin-top: 20px;
}

.pagination a,
.pagination span {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.pagination a:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

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

.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--text-muted);
}

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

.empty-state p {
    font-size: 14px;
}

.sensitive-field {
    position: relative;
}

.sensitive-field .toggle-visibility {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: var(--text-muted);
    font-size: 14px;
    background: none;
    border: none;
}

.sensitive-field input {
    padding-right: 36px;
}

.user-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    border-top: 1px solid var(--border-light);
    margin-top: auto;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-sidebar);
}

.user-bar .user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent-lighter);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
}

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

.user-bar .user-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-bar .user-role {
    font-size: 11px;
    color: var(--text-muted);
}

.captcha-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(61, 43, 31, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(4px);
}

.captcha-panel {
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    width: 340px;
}

.captcha-header {
    display: flex;
    align-items: center;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-light);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.captcha-body {
    padding: 16px;
}

.captcha-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-top: 1px solid var(--border-light);
}

.captcha-footer a {
    color: var(--text-muted);
    font-size: 12px;
}

.captcha-footer .footer-btns {
    display: flex;
    gap: 8px;
}

.captcha-footer button {
    padding: 5px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: #fff;
    cursor: pointer;
    font-size: 12px;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.captcha-footer button:hover {
    background: var(--bg-hover);
}

.tips {
    margin-top: 12px;
    font-size: 12px;
    text-align: center;
    min-height: 18px;
}

.tips.error {
    color: var(--danger);
}

.tips.success {
    color: var(--success);
}

.slider-container {
    position: relative;
    margin-top: 16px;
    background: var(--bg-input);
    border-radius: var(--radius-sm);
    height: 40px;
    border: 1px solid var(--border-color);
}

.slider-track {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: var(--accent-lighter);
    width: 0;
    border-radius: var(--radius-sm);
    transition: none;
}

.slider-btn {
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 40px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    box-shadow: var(--shadow-sm);
    user-select: none;
    transition: none;
    color: var(--accent);
}

.slider-text {
    text-align: center;
    line-height: 40px;
    font-size: 12px;
    color: var(--text-muted);
    pointer-events: none;
}

.bg-img-wrapper {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
}

.bg-img {
    width: 100%;
    display: block;
}

.slide-img {
    position: absolute;
    left: 0;
    display: none;
}

.refresh-icon {
    cursor: pointer;
    margin-left: auto;
    color: var(--text-muted);
    font-size: 16px;
    transition: color 0.2s;
}

.refresh-icon:hover {
    color: var(--danger);
}

.quota-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-hover);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 8px;
}

.quota-bar .quota-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.3s;
}

.quota-fill.green {
    background: var(--success);
}

.quota-fill.yellow {
    background: var(--warning);
}

.quota-fill.red {
    background: var(--danger);
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 16px;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    table {
        font-size: 12px;
    }

    table th,
    table td {
        padding: 8px 10px;
    }

    .mobile-menu-btn {
        display: block !important;
    }
}

.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 200;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    cursor: pointer;
    font-size: 18px;
    box-shadow: var(--shadow-sm);
    align-items: center;
    justify-content: center;
}