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

:root {
    --primary: #4CAF50;
    --primary-dark: #388E3C;
    --primary-light: #C8E6C9;
    --danger: #f44336;
    --warning: #ff9800;
    --success: #4caf50;
    --info: #2196f3;
    --bg: #f5f7fa;
    --card-bg: #ffffff;
    --text: #333333;
    --text-secondary: #666666;
    --border: #e0e0e0;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 16px rgba(0,0,0,0.15);
    --radius: 12px;
    --radius-sm: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--text);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 登录/注册页面 */
.login-box {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 40px;
    max-width: 400px;
    margin: 50px auto;
    box-shadow: var(--shadow-hover);
    text-align: center;
}

.logo {
    margin-bottom: 20px;
}

.logo h1 {
    font-size: 28px;
    color: var(--primary);
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 14px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
    color: var(--text);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: all 0.3s;
    outline: none;
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

.btn-primary {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    padding: 10px 20px;
    background: var(--info);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-danger {
    padding: 10px 20px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.link-text {
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 14px;
}

.link-text a {
    color: var(--primary);
    text-decoration: none;
}

.error-msg {
    background: #ffebee;
    color: var(--danger);
    padding: 12px;
    border-radius: var(--radius-sm);
    margin-top: 16px;
    font-size: 14px;
}

/* 主面板 */
.header {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px 30px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.header h1 {
    font-size: 24px;
    color: var(--primary);
}

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

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}

/* 状态卡片 */
.status-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.status-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.status-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.status-card .card-title {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.status-card .card-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text);
}

.status-card .card-value.positive {
    color: var(--success);
}

.status-card .card-value.negative {
    color: var(--danger);
}

/* 参数面板 */
.params-panel {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.params-section {
    margin-bottom: 30px;
}

.params-section h3 {
    font-size: 18px;
    color: var(--primary);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-light);
}

.params-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.param-item {
    display: flex;
    flex-direction: column;
}

.param-item label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}

.param-item input,
.param-item select {
    padding: 10px 12px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: all 0.3s;
    outline: none;
}

.param-item input:focus,
.param-item select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

.param-item .help-text {
    font-size: 12px;
    color: #999;
    margin-top: 4px;
}

/* 按钮组 */
.btn-group {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.btn-save {
    padding: 12px 30px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-save:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-start {
    padding: 12px 30px;
    background: var(--success);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-stop {
    padding: 12px 30px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-restart {
    padding: 12px 30px;
    background: var(--warning);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

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

/* 日志面板 */
.logs-panel {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.logs-panel h3 {
    font-size: 18px;
    color: var(--primary);
    margin-bottom: 15px;
}

.log-item {
    padding: 10px;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
}

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

.log-time {
    color: #999;
    margin-right: 10px;
}

.log-action {
    color: var(--info);
    font-weight: 500;
}

/* 加载动画 */
.loading {
    display: none;
    text-align: center;
    padding: 20px;
}

.loading.active {
    display: block;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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

/* 响应式 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header {
        padding: 15px;
    }
    
    .params-panel {
        padding: 20px;
    }
    
    .params-grid {
        grid-template-columns: 1fr;
    }
    
    .status-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .login-box {
        margin: 20px auto;
        padding: 30px 20px;
    }
}