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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f5f6fa;
    color: #333;
    min-height: 100vh;
}

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

.sidebar {
    width: 220px;
    background: linear-gradient(180deg, #1a1a2e 0%, #16213e 100%);
    color: #fff;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h1 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 4px;
}

.sidebar-header span {
    font-size: 12px;
    color: rgba(255,255,255,0.6);
}

.sidebar-nav {
    flex: 1;
    padding: 15px 0;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(255,255,255,0.1);
    color: #fff;
}

.nav-item.active {
    background: rgba(255,255,255,0.15);
    color: #fff;
    border-left-color: #4a9eff;
}

.nav-icon {
    margin-right: 12px;
    font-size: 16px;
}

.sidebar-footer {
    padding: 15px 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.server-status {
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.server-status.online { color: #52c41a; }
.server-status.offline { color: #f5222d; }

.main-content {
    flex: 1;
    margin-left: 220px;
    padding: 25px;
    max-width: calc(100% - 220px);
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.page-header h2 {
    font-size: 24px;
    font-weight: 600;
    color: #1a1a2e;
}

.header-actions {
    display: flex;
    gap: 10px;
}

.section {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.section h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 15px;
    color: #333;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin-bottom: 20px;
}

.stat-card {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.stat-icon {
    font-size: 32px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: #333;
}

.stat-label {
    font-size: 13px;
    color: #888;
}

.stat-card.success .stat-icon { color: #52c41a; }
.stat-card.warning .stat-icon { color: #fa8c16; }
.stat-card.danger .stat-icon { color: #f5222d; }

.nodes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
}

.node-card {
    background: #fff;
    border-radius: 10px;
    padding: 15px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    border-left: 4px solid #52c41a;
}

.node-card.warning { border-left-color: #fa8c16; }
.node-card.offline { border-left-color: #f5222d; }

.node-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.node-header h3 {
    font-size: 16px;
    font-weight: 500;
}

.status-badge {
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 500;
}

.status-badge.online { background: #e6f7e6; color: #52c41a; }
.status-badge.warning { background: #fff1e6; color: #fa8c16; }
.status-badge.offline { background: #fff1f0; color: #f5222d; }

.node-info {
    font-size: 13px;
    color: #666;
    margin-bottom: 12px;
}

.node-info p {
    margin-bottom: 4px;
}

.node-actions {
    display: flex;
    gap: 8px;
}

.nodes-table {
    overflow-x: auto;
}

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

.table th, .table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.table th {
    background: #fafafa;
    font-weight: 500;
    color: #666;
    font-size: 13px;
}

.table tr:hover {
    background: #fafafa;
}

.config-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.config-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    font-size: 13px;
    color: #666;
    margin-bottom: 6px;
}

.form-row {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.form-row .form-group {
    flex: 1;
    margin-bottom: 0;
}

.input-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.input, .select, .textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #e8e8e8;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.input:focus, .select:focus, .textarea:focus {
    outline: none;
    border-color: #4a9eff;
}

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

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    background: #4a9eff;
    color: #fff;
}

.btn:hover {
    background: #3a8eff;
}

.btn-secondary {
    background: #f5f5f5;
    color: #666;
}

.btn-secondary:hover {
    background: #e8e8e8;
}

.btn-danger {
    background: #fff1f0;
    color: #f5222d;
}

.btn-danger:hover {
    background: #ffccc7;
}

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

.btn-lg {
    padding: 12px 30px;
    font-size: 15px;
}

.btn-xs {
    padding: 3px 8px;
    font-size: 11px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 5px;
    white-space: nowrap;
    font-size: 13px;
}

.checkbox-inline {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-right: 15px;
    font-size: 13px;
}

.event-types {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.send-form, .broadcast-form {
    max-width: 500px;
}

.send-form .btn-lg, .broadcast-form .btn-lg {
    width: 100%;
}

.api-info {
    max-width: 700px;
}

.api-endpoint {
    margin-bottom: 20px;
}

.api-endpoint label, .api-example label {
    display: block;
    font-size: 13px;
    color: #666;
    margin-bottom: 8px;
}

.code-block {
    background: #f5f5f5;
    border-radius: 6px;
    padding: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
}

.code-block code {
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 13px;
    color: #333;
    word-break: break-all;
}

.code-block pre {
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 12px;
    color: #333;
    white-space: pre-wrap;
    margin: 0;
}

.docs-content h3 {
    margin-top: 25px;
    margin-bottom: 12px;
}

.docs-content h3:first-child {
    margin-top: 0;
}

.docs-content p {
    color: #666;
    margin-bottom: 10px;
}

.docs-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.docs-table th, .docs-table td {
    padding: 10px 12px;
    text-align: left;
    border: 1px solid #e8e8e8;
}

.docs-table th {
    background: #fafafa;
    font-weight: 500;
}

.about-info {
    color: #666;
    line-height: 1.8;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: #fff;
    border-radius: 12px;
    padding: 25px;
    width: 450px;
    max-width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
}

.modal-content h2 {
    margin-bottom: 20px;
    font-size: 18px;
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 24px;
    cursor: pointer;
    color: #999;
}

.close:hover {
    color: #333;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 15px 0 10px;
    padding: 8px 12px;
    background: #f5f5f5;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-color);
}

.section-header:hover {
    background: #e8e8e8;
}

.section-arrow {
    font-size: 12px;
    color: #999;
}

.section-content {
    padding-left: 5px;
}

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

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 12px 25px;
    border-radius: 8px;
    font-size: 14px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s;
    z-index: 2000;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast.success {
    background: #e6f7e6;
    color: #52c41a;
}

.toast.error {
    background: #fff1f0;
    color: #f5222d;
}

.status-online { color: #52c41a; }
.status-inactive { color: #999; }
.status-error { color: #f5222d; }
.status-wechat-online { color: #52c41a; }
.status-wechat-offline { color: #f5222d; }
.status-wechat-unknown { color: #999; }

small {
    font-size: 12px;
    color: #999;
    display: block;
    margin-top: 4px;
}

.empty {
    text-align: center;
    color: #999;
    padding: 40px;
}

@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 60px;
    }

    .sidebar-header h1, .sidebar-header span, .nav-item span {
        display: none;
    }

    .nav-item {
        justify-content: center;
        padding: 15px;
    }

    .nav-icon {
        margin-right: 0;
    }

    .main-content {
        margin-left: 60px;
        max-width: calc(100% - 60px);
    }

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

.log-section {
    max-height: calc(100vh - 200px);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.log-container {
    flex: 1;
    overflow-y: auto;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 12px;
    line-height: 1.6;
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 15px;
    border-radius: 8px;
    min-height: 400px;
    max-height: calc(100vh - 250px);
}

.log-entry {
    padding: 4px 0;
    border-bottom: 1px solid #333;
    display: flex;
    gap: 10px;
    align-items: flex-start;
}

.log-entry:last-child {
    border-bottom: none;
}

.log-time {
    color: #888;
    white-space: nowrap;
}

.log-level {
    font-weight: 600;
    min-width: 60px;
}

.log-source {
    color: #9cdcfe;
    min-width: 80px;
}

.log-message {
    flex: 1;
    word-break: break-all;
}