/* 基础样式重置与变量定义 */
:root {
    --primary-color: #2c82c9; /* 主色调：信任蓝 */
    --accent-color: #ff7e45; /* 强调色：活力橙 */
    --dark-color: #2d3436;
    --light-color: #f8f9fa;
    --success-color: #2ecc71;
    --error-color: #e74c3c;
    font-family: "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.6;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

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

body {
    height: 100vh;
    background-color: var(--primary-color);
    color: var(--light-color);
    overflow: hidden;
    padding: 15px;
}

#app {
    height: 100%;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

#container {
    width: 100%;
    max-width: 800px;
    text-align: center;
    padding: 30px 20px;
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: 12px;
}

/* 标题与描述样式 */
#gametitle {
    font-size: 4rem;
    margin-bottom: 20px;
    color: var(--light-color);
    text-shadow: 0 3px 6px rgba(0, 0, 0, 0.2);
    line-height: 1.2;
}

#gamedescription {
    font-size: 1.4rem;
    margin-bottom: 35px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
}

/* 按钮样式 */
.btn-primary {
    background-color: var(--accent-color);
    border: none;
    color: var(--dark-color);
    font-size: 1.4rem;
    font-weight: 600;
    padding: 15px 40px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 25px;
    min-width: 160px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-primary:hover, .btn-primary:focus {
    background-color: #ff9a6d;
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
    outline: none;
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.2);
}

/* 游戏内容样式 */
#instruction {
    font-size: 2.2rem;
    margin: 20px 0 30px;
    color: var(--light-color);
    font-weight: 500;
}

#question {
    font-size: 6.5rem;
    font-weight: 700;
    letter-spacing: 10px;
    margin: 30px 0 40px;
    padding: 25px;
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    word-wrap: break-word;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

#questionreminder {
    font-size: 1.8rem;
    margin: 30px 0 25px;
    color: var(--light-color);
    font-weight: 500;
}

/* 输入框样式 */
#userinput {
    width: 100%;
    max-width: 450px;
    font-size: 2.2rem;
    text-align: center;
    padding: 20px;
    border: 3px solid transparent;
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--light-color);
    margin: 0 auto 30px;
    transition: all 0.3s ease;
}

#userinput::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

#userinput:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(255, 126, 69, 0.3);
    outline: none;
}

/* 结果展示样式 */
#number {
    font-size: 1.5rem;
    margin: 30px 0 15px;
    color: rgba(255, 255, 255, 0.8);
}

#lastnumber {
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 25px;
    padding: 15px;
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: 8px;
}

#feedback {
    font-size: 1.5rem;
    margin: 20px 0;
    color: rgba(255, 255, 255, 0.8);
}

#answer {
    font-size: 2.5rem;
    font-weight: 600;
    text-decoration: line-through;
    color: var(--error-color);
    margin: 15px 0 35px;
}

#level {
    font-size: 2.5rem;
    font-weight: 600;
    margin: 25px 0;
    color: var(--light-color);
    padding: 10px 20px;
    background-color: rgba(0, 0, 0, 0.15);
    border-radius: 30px;
    display: inline-block;
}

/* 计时器样式 */
.timercontainer {
    width: 100%;
    max-width: 400px;
    height: 15px;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    margin: 25px auto 0;
    overflow: hidden;
}

.apptimer {
    height: 100%;
    background-color: var(--accent-color);
    width: 100%;
    transition: width 0.05s linear; /* 更平滑的过渡 */
}

/* 提示信息样式 */
.hint {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 15px;
}

.success-hint {
    color: var(--success-color);
    font-weight: 500;
    font-size: 1.4rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    #gametitle {
        font-size: 3.5rem;
    }

    #question {
        font-size: 5.5rem;
        letter-spacing: 8px;
        margin: 25px 0 35px;
        padding: 20px;
    }

    #instruction {
        font-size: 2rem;
    }

    #userinput {
        font-size: 2rem;
        padding: 18px;
    }
}

@media (max-width: 480px) {
    #app {
        padding: 10px;
    }

    #container {
        padding: 20px 15px;
    }

    #gametitle {
        font-size: 3rem;
    }

    #gamedescription {
        font-size: 1.2rem;
        margin-bottom: 25px;
    }

    #question {
        font-size: 4.5rem;
        letter-spacing: 5px;
        margin: 20px 0 30px;
        padding: 15px;
    }

    #instruction {
        font-size: 1.8rem;
        margin: 15px 0 25px;
    }

    .btn-primary {
        font-size: 1.2rem;
        padding: 12px 30px;
    }

    #level {
        font-size: 2rem;
    }

    #lastnumber {
        font-size: 2.5rem;
    }
}

@media (max-width: 320px) {
    #question {
        font-size: 3.8rem;
    }

    #userinput {
        font-size: 1.8rem;
    }

    #gametitle {
        font-size: 2.5rem;
    }
}