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

:root {
    --bg-dark: #1a1e2e;
    --bg-sidebar: #141824;
    --bg-main: #f5f7fa;
    --bg-card: #ffffff;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #e2e8f0;
    --text-sidebar: #a0aec0;
    --border: #e2e8f0;
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --radius: 8px;
    --transition: 0.2s ease;
}

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

#app {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background: var(--bg-sidebar);
    color: var(--text-light);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    z-index: 100;
}

.brand {
    padding: 20px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.brand h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
}

.nav-menu {
    padding: 16px 12px;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    color: var(--text-sidebar);
    text-decoration: none;
    border-radius: var(--radius);
    margin-bottom: 4px;
    transition: all var(--transition);
    font-size: 0.95rem;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.nav-item.active {
    background: var(--primary);
    color: #fff;
    font-weight: 600;
}

.nav-item .icon {
    width: 24px;
    text-align: center;
    margin-right: 12px;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

.top-bar {
    background: var(--bg-card);
    padding: 16px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 50;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

.top-bar h1 {
    flex: 1;
    font-size: 1.3rem;
    font-weight: 600;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: 20px;
    font-size: 0.85rem;
    color: #15803d;
    font-weight: 500;
}

.status-badge .dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Content Area */
.content-area {
    padding: 24px;
    flex: 1;
}

.view {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.hidden {
    display: none;
}

/* Stats Grid */
.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-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 16px;
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon.blue { background: #eff6ff; }
.stat-icon.green { background: #f0fdf4; }
.stat-icon.yellow { background: #fefce8; }
.stat-icon.purple { background: #f5f3ff; }

.stat-info h3 {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-info .value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* View Header */
.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.view-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

/* Data Table */
.table-container {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow-x: auto;
}

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

.data-table th,
.data-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    background: #f8fafc;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

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

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

.badge-success {
    background: #f0fdf4;
    color: #15803d;
    border: 1px solid #bbf7d0;
}

.badge-warning {
    background: #fefce8;
    color: #a16207;
    border: 1px solid #fde047;
}

.badge-danger {
    background: #fef2f2;
    color: #b91c1c;
    border: 1px solid #fecaca;
}

.badge-info {
    background: #eff6ff;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

/* Buttons */
.btn-primary {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 8px 16px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background var(--transition);
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-sm {
    background: var(--bg-main);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all var(--transition);
}

.btn-sm:hover {
    background: #e2e8f0;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
    border: none;
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px 8px;
    font-size: 1rem;
    transition: opacity var(--transition);
}

.btn-icon:hover {
    opacity: 0.7;
}

/* Search Box */
.search-box {
    display: flex;
    align-items: center;
    gap: 8px;
}

.search-box input {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    outline: none;
    transition: border var(--transition);
}

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

.search-box button {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 8px 12px;
    border-radius: var(--radius);
    cursor: pointer;
}

/* Chart Section */
.chart-section {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.chart-section h3 {
    margin-bottom: 12px;
    font-weight: 600;
}

/* Channel Grid */
.channel-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.channel-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 16px;
}

.channel-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.channel-icon.alipay {
    background: #eff6ff;
    color: #2563eb;
}

.channel-icon.wechat {
    background: #f0fdf4;
    color: #16a34a;
}

.channel-icon.unionpay {
    background: #fef2f2;
    color: #dc2626;
}

.channel-info {
    flex: 1;
}

.channel-info h4 {
    font-weight: 600;
    margin-bottom: 4px;
}

.channel-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Config Card */
.config-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

.config-card h4 {
    margin-bottom: 16px;
    font-weight: 600;
}

.config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin: 20px 0;
}

.config-item {
    padding: 16px;
    background: var(--bg-main);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.config-item label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.config-item code {
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    background: #fff;
    padding: 6px 10px;
    border-radius: 4px;
    border: 1px solid var(--border);
    font-size: 0.85rem;
    word-break: break-all;
    display: block;
}

.alert {
    padding: 16px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert.info {
    background: #eff6ff;
    border-color: var(--info);
}

.alert.info strong {
    color: #1e40af;
}

.code-block {
    margin-top: 16px;
    background: var(--bg-sidebar);
    border-radius: var(--radius);
    padding: 16px;
    color: var(--text-light);
}

.code-block h5 {
    color: #fff;
    margin-bottom: 8px;
}

.code-block pre {
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    overflow-x: auto;
    margin-bottom: 12px;
}

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

.modal-overlay.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 500px;
    animation: slideUp 0.3s ease;
}

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

.modal-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    line-height: 1;
}

.modal-body {
    padding: 24px;
}

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

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    outline: none;
    transition: border var(--transition);
}

.config-item input,
.config-item select,
.config-item textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.85rem;
    outline: none;
    transition: border var(--transition);
    background: #fff;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 20px;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--bg-sidebar);
    color: #fff;
    padding: 12px 20px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    transform: translateX(120%);
    transition: transform 0.3s ease;
    z-index: 2000;
}

.toast.show {
    transform: translateX(0);
}

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--danger);
}

/* Auth View */
.login-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.login-overlay.show {
    display: flex;
}

.auth-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    max-width: 420px;
    width: 100%;
    animation: slideUp 0.3s ease;
}

.auth-logo {
    font-size: 3rem;
    margin-bottom: 12px;
}

.auth-card h2 {
    margin-bottom: 8px;
    font-size: 1.4rem;
}

.auth-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.auth-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    outline: none;
    transition: border var(--transition);
    text-align: center;
}

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

.auth-error {
    color: var(--danger);
    font-size: 0.85rem;
    margin-top: 8px;
    min-height: 20px;
}

.btn-block {
    width: 100%;
    padding: 12px;
    font-size: 1rem;
}

/* Key Management */
.key-management {
    margin-top: 24px;
}

.key-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 16px;
}

.key-item {
    padding: 16px;
    background: var(--bg-main);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.key-item label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.key-value {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.key-value code {
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    background: #fff;
    padding: 8px 12px;
    border-radius: 4px;
    border: 1px solid var(--border);
    font-size: 0.85rem;
    word-break: break-all;
    flex: 1;
    min-width: 120px;
}

.key-item small {
    display: block;
    color: var(--text-secondary);
    font-size: 0.78rem;
    line-height: 1.5;
}

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

.btn-warning:hover {
    background: #d97706;
    border-color: #d97706;
}

/* Modal Form */
.modal-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.modal-form label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.modal-form input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    outline: none;
}

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

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: -250px;
        bottom: 0;
        height: 100vh;
    }

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

    .menu-toggle {
        display: block;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .data-table {
        font-size: 0.8rem;
    }

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