/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #121212;
    color: #f0f0f0;
    line-height: 1.6;
}

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

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px 0;
    border-bottom: 2px solid #333;
}

h1 {
    font-size: 2.5rem;
    color: #4CAF50;
    text-shadow: 0 0 10px rgba(76, 175, 80, 0.3);
}

h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #e0e0e0;
}

h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: #fff;
}

/* 主菜单样式 */
.main-menu {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
}

.training-options {
    flex: 2;
    min-width: 300px;
}

.settings-panel {
    flex: 1;
    min-width: 250px;
    background-color: #1e1e1e;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

/* 训练卡片网格 */
.training-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.training-card {
    background-color: #1e1e1e;
    border-radius: 8px;
    padding: 20px;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    border: 2px solid transparent;
}

.training-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
    border-color: #4CAF50;
}

.training-card.selected {
    border-color: #4CAF50;
    box-shadow: 0 0 15px rgba(76, 175, 80, 0.5);
}

.training-card p {
    color: #aaa;
    font-size: 0.9rem;
    margin-top: 10px;
}

/* 设置面板样式 */
.setting {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    color: #ccc;
}

input[type="number"], select {
    width: 100%;
    padding: 10px;
    background-color: #333;
    border: 1px solid #444;
    border-radius: 4px;
    color: #fff;
    font-size: 1rem;
}

button {
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

.primary-btn {
    background-color: #4CAF50;
    color: white;
    padding: 12px 20px;
    width: 100%;
    margin-top: 20px;
    font-weight: bold;
}

.primary-btn:hover {
    background-color: #3e8e41;
}

.secondary-btn {
    background-color: #555;
    color: white;
    margin-top: 15px;
}

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

#fullscreen-toggle {
    background-color: #333;
    color: white;
    width: 100%;
}

#fullscreen-toggle:hover {
    background-color: #444;
}

/* 训练区域样式 */
#training-area {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #121212;
    z-index: 100;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* 结果面板样式 */
#results-panel {
    background-color: #1e1e1e;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

#results-content {
    margin: 20px 0;
    font-size: 1.1rem;
    line-height: 1.8;
}

/* 通用样式 */
.hidden {
    display: none !important;
}

/* 训练模式特定样式 */
.timer-display {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 1.5rem;
    color: #fff;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 10px 15px;
    border-radius: 4px;
}

.score-display {
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 1.5rem;
    color: #fff;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 10px 15px;
    border-radius: 4px;
}

.training-controls {
    position: absolute;
    bottom: 20px;
    display: flex;
    gap: 10px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-menu {
        flex-direction: column;
    }
    
    .training-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
}