:root {
    --primary-color: #6366f1;
    --success-color: #22c55e;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
}

/* 深色主题 */
[data-theme="dark"] {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
}

/* 浅色主题 */
[data-theme="light"] {
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
}

* {
    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-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 20px;
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: #4f46e5;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-icon {
    padding: 10px;
    background: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-icon:hover {
    background: var(--border-color);
    transform: translateY(-2px);
}

.btn-icon svg {
    display: block;
}

.theme-icon {
    font-size: 18px;
    display: block;
    line-height: 1;
}

.auto-refresh label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 14px;
}

.stats-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-value.small {
    font-size: 16px;
    font-weight: 500;
}

.stat-card.online .stat-value {
    color: var(--success-color);
}

.stat-card.offline .stat-value {
    color: var(--error-color);
}

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

.error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid var(--error-color);
}

.endpoints-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

.endpoint-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    transition: all 0.3s;
}

.endpoint-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.endpoint-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.endpoint-name {
    font-size: 18px;
    font-weight: 700;
}

.status-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.status-badge.online {
    background: rgba(34, 197, 94, 0.2);
    color: var(--success-color);
}

.status-badge.offline {
    background: rgba(239, 68, 68, 0.2);
    color: var(--error-color);
}

.status-badge.testing {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning-color);
}

.status-badge.unknown {
    background: rgba(148, 163, 184, 0.2);
    color: var(--text-secondary);
}

.endpoint-url {
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 16px;
    word-break: break-all;
}

.endpoint-url-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
}

.endpoint-url-row .endpoint-url {
    margin-bottom: 0;
    flex: 1;
}

.invite-link {
    color: var(--primary-color);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    padding: 4px 12px;
    border-radius: 6px;
    background: rgba(99, 102, 241, 0.1);
    transition: all 0.3s;
}

.invite-link:hover {
    background: rgba(99, 102, 241, 0.2);
    transform: translateY(-1px);
}

.endpoint-metrics {
    display: grid;
    gap: 12px;
}

.metric {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.metric:last-child {
    border-bottom: none;
}

.metric-label {
    color: var(--text-secondary);
    font-size: 14px;
}

.metric-value {
    font-weight: 600;
    font-size: 14px;
}

.metric-value.fast {
    color: var(--success-color);
}

.metric-value.medium {
    color: var(--warning-color);
}

.metric-value.slow {
    color: var(--error-color);
}

.error-message {
    color: var(--error-color);
    font-size: 13px;
    padding: 10px;
    background: rgba(239, 68, 68, 0.1);
    border-radius: 6px;
    position: fixed;
    z-index: 1001;
    max-width: 400px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(239, 68, 68, 0.3);
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.error-message.show {
    display: block;
}

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

.error-indicator {
    color: var(--error-color);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
    padding: 4px 12px;
    border-radius: 6px;
    background: rgba(239, 68, 68, 0.1);
    transition: all 0.3s;
    display: inline-block;
}

.error-indicator:hover {
    background: rgba(239, 68, 68, 0.2);
    transform: translateY(-1px);
}

/* 按钮样式 */
.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-success:hover {
    background: #16a34a;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(34, 197, 94, 0.4);
}

.btn-secondary {
    background: var(--border-color);
    color: var(--text-primary);
}

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

.btn-info {
    background: #0ea5e9;
    color: white;
}

.btn-info:hover {
    background: #0284c7;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.4);
}

/* 公告弹窗样式 */
.announcement-content {
    padding: 20px 0;
}

.announcement-content p {
    margin-bottom: 16px;
    line-height: 1.6;
    color: var(--text-primary);
}

.announcement-content h3 {
    color: var(--primary-color);
    margin-bottom: 16px;
    font-size: 1.2rem;
}

.announcement-content ul {
    margin: 20px 0;
    padding-left: 20px;
}

.announcement-content li {
    margin-bottom: 12px;
    line-height: 1.5;
}

.announcement-content strong {
    color: var(--primary-color);
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
}

.modal-body {
    padding: 24px;
}

/* 模态弹窗 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

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

.modal-content {
    background: var(--card-bg);
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 32px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s;
}

.modal-close:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

/* 表单样式 */
form {
    padding: 24px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    background: var(--bg-color);
    color: var(--text-primary);
    transition: all 0.3s;
    box-sizing: border-box;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group small {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-secondary);
}

.form-group small.warning {
    color: var(--warning-color);
    font-weight: 600;
}

.form-group input:disabled {
    background: var(--border-color);
    color: var(--text-secondary);
    cursor: not-allowed;
    opacity: 0.7;
}

.form-group input:disabled:focus {
    outline: none;
    border-color: var(--border-color);
    box-shadow: none;
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

@media (max-width: 768px) {
    h1 {
        font-size: 1.5rem;
    }

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

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