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

body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
    width: 350px;
}

h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #333;
}

.slider-container {
    position: relative;
    margin: 20px 0;
}

.slider-track {
    position: relative;
    height: 40px;
    background-color: #e8e8e8;
    border-radius: 20px;
    overflow: hidden;
}

.slider-bg {
    position: absolute;
    height: 100%;
    background-color: #91d5ff;
    width: 0;
    transition: width 0.2s;
}

.slider-text {
    position: absolute;
    width: 100%;
    height: 100%;
    text-align: center;
    line-height: 40px;
    color: #333;
    font-size: 14px;
    z-index: 1;
}

.slider-btn {
    position: absolute;
    width: 40px;
    height: 40px;
    background-color: #fff;
    border-radius: 50%;
    box-shadow: 0 0 3px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    z-index: 2;
    display: flex;
    justify-content: center;
    align-items: center;
}

.arrow {
    color: #1890ff;
    font-style: normal;
}

.success-message {
    display: none;
    text-align: center;
    color: #52c41a;
    font-weight: bold;
    margin-top: 10px;
}