/* ==================== 重置与基础 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --success: #22c55e;
    --success-hover: #16a34a;
    --warning: #f59e0b;
    --warning-hover: #d97706;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --info: #06b6d4;
    --info-hover: #0891b2;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-muted: #64748b;
    --shadow: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
    --radius: 8px;
    --radius-lg: 12px;
    --transition: all 0.2s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* ==================== 顶部导航栏 ==================== */
.topbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.topbar-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
}

.topbar-status {
    font-size: 0.85rem;
    padding: 4px 10px;
    border-radius: 20px;
    background: var(--border);
    color: var(--text-muted);
}

.topbar-status.connected {
    background: #dcfce7;
    color: #166534;
}

/* ==================== 主容器 ==================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 20px;
}

/* ==================== 侧边栏 ==================== */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.panel {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.panel h2 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group {
    margin-bottom: 14px;
}

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

.form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    transition: var(--transition);
    background: var(--card-bg);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.form-hint code {
    background: #f1f5f9;
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 0.7rem;
}

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 16px;
    border: none;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover:not(:disabled) { background: var(--success-hover); }

.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover:not(:disabled) { background: var(--warning-hover); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover:not(:disabled) { background: var(--danger-hover); }

.btn-info { background: var(--info); color: #fff; }
.btn-info:hover:not(:disabled) { background: var(--info-hover); }

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}
.btn-outline:hover:not(:disabled) {
    background: var(--bg);
    border-color: var(--primary);
    color: var(--primary);
}

.batch-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.login-msg {
    margin-top: 10px;
    font-size: 0.8rem;
    min-height: 20px;
}
.login-msg.success { color: var(--success); }
.login-msg.error { color: var(--danger); }

/* ==================== 主内容区 ==================== */
.main-content {
    min-width: 0;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.panel-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.panel-header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.server-count {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ==================== 加载/空状态 ==================== */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 12px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

/* ==================== 表格 ==================== */
.table-wrapper {
    overflow-x: auto;
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.server-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

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

.server-table th {
    background: #f8fafc;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

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

.server-table tbody tr:last-child td {
    border-bottom: none;
}

/* 状态徽章 */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.status-badge.on { background: #dcfce7; color: #166534; }
.status-badge.off { background: #fee2e2; color: #991b1b; }
.status-badge.unknown { background: #fef3c7; color: #92400e; }
.status-badge.loading { background: #e0e7ff; color: #3730a3; }

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
}

/* 操作按钮 */
.action-btn {
    padding: 6px 10px;
    font-size: 0.75rem;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    margin-right: 4px;
}
.action-btn:last-child { margin-right: 0; }
.action-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ==================== 弹窗 ==================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 480px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

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

.modal-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
    line-height: 1;
    padding: 0;
}
.modal-close:hover { color: var(--text); }

.modal-body {
    padding: 20px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}

/* ==================== Toast 通知 ==================== */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    background: var(--card-bg);
    border-left: 4px solid var(--primary);
    min-width: 280px;
    max-width: 400px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }
.toast.info { border-left-color: var(--info); }

.toast-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

.toast-message {
    flex: 1;
    font-size: 0.875rem;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: 0;
    line-height: 1;
}

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
    .container {
        grid-template-columns: 1fr;
    }
    .sidebar {
        flex-direction: row;
        flex-wrap: wrap;
    }
    .sidebar .panel {
        flex: 1;
        min-width: 280px;
    }
}

@media (max-width: 768px) {
    .topbar-inner { padding: 12px 16px; }
    .container { padding: 16px; }
    .panel { padding: 16px; }
    .server-table th, .server-table td { padding: 10px 12px; }
    .batch-buttons { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
    .batch-buttons { grid-template-columns: 1fr; }
    .modal { margin: 10px; }
    .toast { min-width: auto; max-width: calc(100vw - 40px); }
}

/* ==================== 系统日志窗口 ==================== */
.log-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: #0d1117;
    border-top: 1px solid #30363d;
    z-index: 500;
    display: flex;
    flex-direction: column;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.75rem;
    line-height: 1.5;
    color: #e6edf3;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.3);
    transform: translateY(0);
    transition: transform 0.3s ease;
}

.log-panel.collapsed {
    transform: translateY(calc(100% - 36px));
}

.log-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background: #161b22;
    border-bottom: 1px solid #30363d;
    height: 36px;
    flex-shrink: 0;
}

.log-title {
    font-weight: 600;
    color: #58a6ff;
    font-size: 0.8rem;
}

.log-controls {
    display: flex;
    gap: 6px;
}

.log-content {
    flex: 1;
    overflow-y: auto;
    padding: 8px 16px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.log-entry {
    display: flex;
    gap: 8px;
    padding: 2px 0;
    border-bottom: 1px solid #21262d;
    word-break: break-all;
}

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

.log-time {
    color: #8b949e;
    white-space: nowrap;
    flex-shrink: 0;
    font-variant-numeric: tabular-nums;
}

.log-level {
    padding: 0 6px;
    border-radius: 3px;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    white-space: nowrap;
    flex-shrink: 0;
}

.log-level.info { background: #1f6feb; color: #fff; }
.log-level.success { background: #238636; color: #fff; }
.log-level.warning { background: #9e6a03; color: #fff; }
.log-level.error { background: #da3633; color: #fff; }
.log-level.debug { background: #6e7681; color: #fff; }

.log-message {
    flex: 1;
    color: #e6edf3;
    word-break: break-word;
}

.log-message.error { color: #f85149; }
.log-message.warning { color: #d29922; }
.log-message.success { color: #3fb950; }
.log-message.debug { color: #8b949e; }

.log-detail {
    margin-top: 4px;
    padding: 6px 10px;
    background: #161b22;
    border-radius: 4px;
    border: 1px solid #30363d;
    font-size: 0.7rem;
    color: #8b949e;
    white-space: pre-wrap;
    word-break: break-all;
}

@media (max-width: 768px) {
    .log-panel {
        height: 180px;
    }
    .log-content {
        padding: 6px 12px;
    }
}