/* 练习配置页面样式 */

.config-container {
    max-width: 800px;
    margin: 40px auto;
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(147, 51, 234, 0.1);
    border: 1px solid var(--border-color);
}

.config-header {
    text-align: center;
    margin-bottom: 40px;
}

.config-header h1 {
    color: var(--color-primary);
    font-size: 2.2rem;
    margin-bottom: 15px;
}

.config-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

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

.config-section h3 {
    color: var(--text-main);
    margin-bottom: 15px;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.config-section h3 i {
    color: var(--color-primary);
}

.difficulty-selector {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 20px;
}

.difficulty-selector .selector-group {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 200px;
}

.difficulty-selector label {
    font-weight: 700;
    color: var(--color-primary);
    font-size: 1rem;
    white-space: nowrap;
}

.difficulty-selector select {
    padding: 10px 15px;
    border-radius: 10px;
    border: 2px solid var(--border-color);
    background: white;
    color: var(--text-main);
    outline: none;
    transition: 0.3s;
    min-width: 120px;
    flex: 1;
    font-size: 1rem;
}

.difficulty-selector select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(147, 51, 234, 0.1);
}

.switch-container {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-top: 20px;
}

.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--color-primary);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.switch-label {
    font-weight: 700;
    color: var(--color-primary);
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.switch-description {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-left: 5px;
}

/* 统一的信息框样式 */
.info-box {
    background: rgba(147, 51, 234, 0.05);
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
    border-left: 4px solid var(--color-primary);
}

/* 桌面端布局 - 默认 */
.info-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.info-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.info-label {
    font-size: 1rem;
    color: var(--text-main);
}

.info-value {
    font-size: 1rem;
    color: var(--color-primary);
    font-weight: bold;
}

.theme-content {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.theme-label {
    font-size: 1rem;
    color: var(--text-main);
}

.theme-value {
    font-size: 1rem;
    color: var(--color-primary);
    font-weight: bold;
}

.btn-change {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 15px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
    display: inline-flex;
    align-items: center;
    gap: 5px;
    white-space: nowrap;
}

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

.start-button-container {
    text-align: center;
    margin-top: 40px;
}

.btn-start {
    background: linear-gradient(135deg, var(--color-primary) 0%, #7e22ce 100%);
    color: white;
    border: none;
    padding: 15px 40px;
    border-radius: 30px;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(147, 51, 234, 0.3);
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.btn-start:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(147, 51, 234, 0.4);
}

/* 手机端布局 */
@media (max-width: 768px) {
    .config-container {
        margin: 20px;
        padding: 25px;
    }
    
    .difficulty-selector {
        flex-direction: column;
        gap: 15px;
    }
    
    .difficulty-selector .selector-group {
        width: 100%;
    }
    
    .switch-container {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .info-box {
        padding: 15px;
    }
    
    /* 手机端网格布局 */
    .info-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 15px;
    }
    
    .info-item {
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
    }
    
    .info-label {
        font-size: 0.85rem;
        color: var(--text-muted);
        margin-bottom: 3px;
    }
    
    .info-value {
        font-size: 1rem;
    }
    
    /* 主题内容区域特殊样式 */
    .theme-content {
        grid-column: span 2; /* 主题内容占据两列 */
        flex-direction: column;
        align-items: flex-start;
        margin-bottom: 10px;
    }
    
    .theme-label {
        font-size: 0.85rem;
        color: var(--text-muted);
        margin-bottom: 5px;
    }
    
    .theme-value {
        font-size: 1rem;
        margin-bottom: 8px;
    }
    
    .btn-change {
        width: 100%;
        justify-content: center;
        padding: 8px 15px;
        font-size: 0.9rem;
    }
}