styles.css

/* MD3 风格的基本样式 */
body {
    font-family: Roboto, sans-serif;
    background-color: #f9fafb;
    color: #1f2937;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    background-color: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    padding: 24px;
    width: 100%;
    max-width: 600px;
    margin-bottom: 20px;
    transition: background-color 0.3s ease;
}

h1 {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 24px;
    text-align: center;
}

#question {
    font-size: 18px;
    font-weight: 400;
    margin-bottom: 16px;
}

.option {
    background-color: #e5e7eb;
    color: #1f2937;
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    width: 100%;
    margin-bottom: 12px;
    position: relative;
    overflow: hidden;
    transition: background-color 0.3s ease;
}

.option:hover {
    background-color: #d1d5db;
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.3);
    transform: scale(0);
    animation: ripple-animation 0.6s linear;
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

#result {
    margin-top: 16px;
    font-size: 16px;
    font-weight: 400;
    text-align: center;
}

.footer {
    font-size: 14px;
    color: #6b7280;
    text-align: center;
}

/* 暗色模式样式 */
body.dark-mode {
    background-color: #121212;
    color: #e5e5e5;
}

.dark-mode .container {
    background-color: #1e1e1e;
}

.dark-mode .option {
    background-color: #2b2b2b;
    color: #e5e5e5;
}

.dark-mode .option:hover {
    background-color: #383838;
}

.dark-mode .footer {
    color: #a0a0a0;
}

.toggle-mode {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: #e5e7eb;
    color: #1f2937;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.toggle-mode:hover {
    background-color: #d1d5db;
}

.dark-mode .toggle-mode {
    background-color: #2b2b2b;
    color: #e5e5e5;
}

.dark-mode .toggle-mode:hover {
    background-color: #383838;
}

/* 进度条样式 */
.progress-container {
    width: 100%;
    max-width: 600px;
    background-color: #ddd;
    margin-bottom: 20px;
    border-radius: 6px;
    position: relative;
    height: 30px;
    overflow: hidden;
}

/* 答题后进度条容器背景颜色 */
.progress-container.has-answered {
    background-color: #ff0000;
}

.progress-bar {
    width: 0%;
    height: 100%;
    background-color: #4CAF50;
    text-align: center;
    line-height: 30px;
    color: white;
    transition: width 0.3s ease;
    border-radius: 6px;
}

.progress-text-correct {
    position: absolute;
    top: 0;
    left: 10px;
    line-height: 30px;
    color: white;
}

.progress-text-wrong {
    position: absolute;
    top: 0;
    right: 10px;
    line-height: 30px;
    color: white;
}

.dark-mode .progress-container {
    background-color: #333;
}

.dark-mode .progress-container.has-answered {
    background-color: #8b0000;
}

.dark-mode .progress-text-correct,
.dark-mode .progress-text-wrong {
    color: #e5e5e5;
}

/* 手机端样式优化 */
@media (max-width: 600px) {
    h1 {
        font-size: 20px;
    }

    #question {
        font-size: 16px;
    }

   .option {
        padding: 10px 20px;
        font-size: 14px;
    }

    #result {
        font-size: 14px;
    }

   .footer {
        font-size: 12px;
    }

   .toggle-mode {
        top: 10px;
        right: 10px;
        padding: 6px 12px;
        font-size: 12px;
    }

    /* 让答题框变窄一点并与手机边框保持更大距离 */
   .container {
        width: 80%; /* 进一步缩小宽度 */
        padding: 20px; /* 适当增加内边距 */
    }

    /* 进度框与手机边框保持更大距离 */
   .progress-container {
        width: 80%; /* 与答题框宽度一致 */
    }

    /* 一行显示两个选项 */
   #options-container {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
    }

   #options-container .option {
        width: calc(50% - 6px); /* 每个选项宽度为 50% 减去间距 */
        margin-bottom: 12px;
    }
}