/* Solid Game - 立体几何学习游戏 样式 */

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
    touch-action: none;
    position: fixed;
    width: 100%;
    height: 100%;
}

/* 屏幕管理 */
.screen {
    display: none;
    width: 100%;
    height: 100%;
}

.screen.active {
    display: block;
}

/* ========== 主菜单样式 ========== */

#main-menu {
    overflow-y: auto;
}

.menu-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.game-title {
    font-size: 48px;
    color: white;
    text-align: center;
    margin-bottom: 10px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.game-subtitle {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    text-align: center;
    margin-bottom: 40px;
}

.section-title {
    font-size: 24px;
    color: white;
    margin-bottom: 20px;
    text-align: center;
}

/* 模式选择网格 */
.mode-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.mode-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.mode-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.mode-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.mode-card h3 {
    font-size: 22px;
    color: #333;
    margin-bottom: 10px;
}

.mode-card p {
    color: #666;
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 15px;
}

.mode-info {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.grade-badge {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 12px;
}

.difficulty {
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 12px;
    color: white;
}

.difficulty.easy {
    background: #43e97b;
}

.difficulty.medium {
    background: #f5576c;
}

.difficulty.hard {
    background: #764ba2;
}

/* 玩家统计 */
.player-stats {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 25px;
    margin-bottom: 20px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
}

.stat-card {
    text-align: center;
    padding: 15px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 15px;
}

.stat-value {
    font-size: 32px;
    font-weight: bold;
    color: #667eea;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    color: #666;
}

/* 快捷操作 */
.quick-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.action-btn {
    background: white;
    color: #667eea;
    border: 2px solid #667eea;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.action-btn:hover {
    background: #667eea;
    color: white;
    transform: scale(1.05);
}

/* ========== 游戏界面样式 ========== */

#header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    z-index: 100;
}

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

.back-btn {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
}

.mode-title {
    font-size: 18px;
    font-weight: bold;
    color: #333;
}

.header-right {
    display: flex;
    gap: 15px;
}

.level-badge, .score-display {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 16px;
    font-weight: bold;
}

.score-display {
    background: linear-gradient(135deg, #f093fb, #f5576c);
}

/* 进度条 */
#progress-container {
    position: absolute;
    top: 90px;
    right: 20px;
    background: rgba(255, 255, 255, 0.95);
    padding: 12px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    z-index: 100;
}

#progress-label {
    font-size: 12px;
    color: #666;
    margin-bottom: 6px;
}

#progress-bar {
    width: 120px;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
}

#progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.5s ease;
}

/* 3D 画布 */
#canvas-container {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: rgba(240, 244, 248, 0.5);
    overflow: hidden;
}

#canvas-container canvas {
    display: block !important;
    width: 100% !important;
    height: 100% !important;
    touch-action: none;
}

/* 2D 画布 */
#2d-canvas {
    position: absolute;
    top: 70px;
    left: 50%;
    transform: translateX(-50%);
    background: white;
    border-radius: 15px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

/* 目标区域 */
#target-zone {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 250px;
    height: 250px;
    border: 4px dashed rgba(255, 255, 255, 0.6);
    border-radius: 20px;
    display: none;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.15);
    pointer-events: none;
    z-index: 50;
}

#target-zone.active {
    display: flex;
}

#target-label {
    color: white;
    font-size: 16px;
    text-align: center;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

/* 提示文字 */
#hint-text {
    position: absolute;
    top: 85px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.95);
    padding: 10px 20px;
    border-radius: 15px;
    font-size: 14px;
    color: #666;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    z-index: 90;
    white-space: nowrap;
    max-width: 90%;
}

/* 问题区域 */
#question-area {
    position: absolute;
    top: 130px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.95);
    padding: 20px 30px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    z-index: 90;
    text-align: center;
}

#question-text {
    font-size: 18px;
    color: #333;
    font-weight: bold;
}

/* 选项容器（2D 选项） */
#options-container {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    z-index: 100;
    flex-wrap: wrap;
    justify-content: center;
    max-width: 95%;
}

.option-btn {
    width: 120px;
    height: 120px;
    border: 3px solid #667eea;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 16px;
    background: white;
    flex-direction: column;
    gap: 8px;
}

.option-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.option-btn.selected {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-color: #764ba2;
    color: white;
}

.option-btn canvas {
    max-width: 80px;
    max-height: 80px;
}

/* 底部选择区（3D 选项） */
#selection-zone {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    display: none;
    gap: 15px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px 15px 0 0;
    box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.15);
    z-index: 100;
    pointer-events: auto;
    max-width: 95%;
}

#selection-zone.active {
    display: flex;
}

.shape-option {
    width: 80px;
    height: 80px;
    border: 3px solid #667eea;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 32px;
    background: white;
}

.shape-option:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.shape-option.selected {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-color: #764ba2;
    transform: scale(1.15);
}

/* 消息弹窗 */
#message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 40px 60px;
    border-radius: 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
    z-index: 200;
    display: none;
    animation: popIn 0.5s ease;
    max-width: 90%;
}

@keyframes popIn {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.5);
    }
    100% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

#message h2 {
    font-size: 32px;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

#message p {
    font-size: 18px;
    color: #666;
    margin-bottom: 25px;
    line-height: 1.6;
}

#message-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.msg-btn {
    border: none;
    padding: 12px 30px;
    font-size: 16px;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.msg-btn.primary {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.msg-btn.secondary {
    background: white;
    color: #667eea;
    border: 2px solid #667eea;
}

.msg-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

/* 答案解析 */
#explanation {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 30px 40px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    z-index: 210;
    display: none;
    max-width: 500px;
    max-height: 80%;
    overflow-y: auto;
}

#explanation h3 {
    font-size: 22px;
    color: #667eea;
    margin-bottom: 15px;
}

#explanation p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

#explanation-close {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    padding: 10px 30px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 16px;
}

/* 帮助弹窗 */
#help-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 300;
}

#help-modal.active {
    display: flex;
}

.modal-content {
    background: white;
    padding: 40px;
    border-radius: 20px;
    max-width: 500px;
    max-height: 80%;
    overflow-y: auto;
}

.modal-content h2 {
    font-size: 28px;
    color: #667eea;
    margin-bottom: 25px;
    text-align: center;
}

.help-sections {
    margin-bottom: 25px;
}

.help-section {
    margin-bottom: 20px;
}

.help-section h3 {
    font-size: 18px;
    color: #333;
    margin-bottom: 10px;
}

.help-section p {
    font-size: 15px;
    color: #666;
    line-height: 1.6;
}

.modal-close {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    padding: 12px 40px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 16px;
    display: block;
    margin: 0 auto;
}

/* ========== 响应式设计 ========== */

@media (max-width: 768px) {
    .game-title {
        font-size: 32px;
    }
    
    .game-subtitle {
        font-size: 16px;
    }
    
    .mode-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    #header {
        height: 60px;
        padding: 0 10px;
    }
    
    .back-btn {
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .mode-title {
        font-size: 14px;
    }
    
    .level-badge, .score-display {
        padding: 6px 12px;
        font-size: 14px;
    }
    
    #progress-container {
        top: 75px;
        right: 10px;
        padding: 8px;
    }
    
    #progress-bar {
        width: 80px;
    }
    
    #hint-text {
        top: 75px;
        font-size: 12px;
        padding: 8px 15px;
    }
    
    #question-area {
        top: 110px;
        padding: 15px 20px;
    }
    
    #question-text {
        font-size: 16px;
    }
    
    #options-container {
        bottom: 20px;
        padding: 10px;
        gap: 10px;
    }
    
    .option-btn {
        width: 90px;
        height: 90px;
        font-size: 14px;
    }
    
    #selection-zone {
        padding: 10px;
        gap: 8px;
    }
    
    .shape-option {
        width: 60px;
        height: 60px;
        font-size: 24px;
    }
    
    #message {
        padding: 30px 20px;
    }
    
    #message h2 {
        font-size: 24px;
    }
    
    #message p {
        font-size: 16px;
    }
}

/* 成功动画 */
.success {
    animation: celebrate 0.6s ease;
}

@keyframes celebrate {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* 震动动画 */
.shake {
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}