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

body {
    font-family: 'Arial', sans-serif;
    background-color: #eff8fa;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

.game-container {
    width: 90%;
    max-width: 800px;
    height: 90vh;
    max-height: 900px;
    display: flex;
    flex-direction: column;
    background-color: #eff8fa;
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

/* 游戏画布样式 */
#gameCanvas {
    width: 100%;
    height: 70%;
    background-color: #add8e6;
    display: block;
}

/* 单词拼写区域样式 */
.word-spelling-container {
    width: 100%;
    height: 20%;
    background-color: #e0eaf9;
    border-radius: 5px 5px 0px 0px;
    margin-top: -10px;
    padding: 15px;
    box-shadow: 0 -5px 10px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    z-index: 1;
}

.word-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

#incompleteWord {
    font-size: 1.8rem;
    font-weight: bold;
    letter-spacing: 2px;
}

#wordMeaning {
    font-size: 1.5rem;
    color: #424242;
}

.letter-options {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.letter-option {
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #4a90e2;
    color: white;
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.letter-option:hover {
    transform: scale(1.1);
    background-color: #3a7bc8;
}

/* 控制按钮区域样式 */
.control-buttons {
    width: 100%;
    height: 12%;
    background-color: #eff8fa;
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 0 100px;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.control-btn {
    padding: 10px 15px;
    font-size: 1rem;
    background-color: #4a90e2;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

/* 按钮不同颜色 */
#soundToggle {
    background-color: #4CAF50; /* 绿色 */
}

#soundToggle:hover {
    background-color: #3d8b40;
}

#soundToggle .sound-off {
    color: #fff;
}

/* 音效关闭状态使用灰色 */
.sound-off.hidden + #soundToggle, 
#soundToggle.sound-off {
    background-color: #777;
}

/* 难度按钮样式 */
#difficultyToggle {
    background-color: #FF9800; /* 橙色 */
}

#difficultyToggle:hover {
    background-color: #e68900;
}

/* 难度级别不同配色 - 使用同一颜色的不同深度 */
#difficultyToggle.difficulty-low {
    background-color: #fd8cb3; /* 浅粉色 */
}

#difficultyToggle.difficulty-medium {
    background-color: #fc5891; /* 中粉色 */
}

#difficultyToggle.difficulty-high {
    background-color: #f71f6b; /* 深粉色 */
}

/* 文件导入按钮样式 */
.file-input-wrapper .control-btn {
    background-color: #FF9800; /* 橙色 */
}

.file-input-wrapper .control-btn:hover {
    background-color: #c97a03;
}

/* 开始游戏按钮样式 */
#startGame {
    background-color: #364bed; /* 蓝色 */
}

#startGame:hover {
    background-color: #2f42d3;
}

.control-btn:hover {
    background-color: #3a7bc8;
}

.file-input-wrapper {
    position: relative;
}

#fileInput {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* 游戏结束弹窗样式 */
.game-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.game-modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    width: 80%;
    max-width: 400px;
    background-color: white;
    border-radius: 15px;
    padding: 35px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    animation: modal-appear 0.5s ease-out;
    transform-origin: center center;
}

@keyframes modal-appear {
    0% { transform: scale(0.7); opacity: 0; }
    70% { transform: scale(1.05); }
    100% { transform: scale(1); opacity: 1; }
}

.modal-title {
    font-size: 2.2rem;
    margin-bottom: 20px;
    color: #4a90e2;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
}

.modal-btn {
    padding: 12px 24px;
    margin-top: 25px;
    font-size: 1.2rem;
    font-weight: bold;
    background-color: #4a90e2;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

.modal-btn:hover {
    background-color: #3a7bc8;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.modal-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.hidden {
    display: none;
}