* {
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #fafafa;
    color: #222;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 600px;
    margin: 30px auto;
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

h1 {
    margin-top: 0;
    text-align: center;
}

.intro {
    text-align: center;
    line-height: 1.5;
    margin-bottom: 25px;
    color: #555;
}

.card-slider {
    position: relative;
    margin: 25px auto;
    max-width: 100%;
    overflow: hidden;
    border-radius: 12px;
    border: 1px solid #eee;
}

.slides {
    display: flex;
    transition: transform 0.3s ease;
}

.slides img {
    width: 100%;
    flex: 0 0 100%;
    display: block;
}

.slider-button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    padding: 0;
    margin: 0;
    border-radius: 50%;
    border: none;
    background: rgba(0,0,0,0.55);
    color: white;
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
}

.slider-button.prev {
    left: 10px;
}

.slider-button.next {
    right: 10px;
}

.slider-dots {
    position: absolute;
    bottom: 12px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    padding: 0 40px;
}

.dot {
    width: 10px;
    height: 10px;
    padding: 0;
    margin: 0;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.5);
    cursor: pointer;
}

.dot.active {
    background: white;
}

.step-counter {
    text-align: center;
    font-size: 14px;
    color: #666;
    margin: 0;
}

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

    .container {
        margin: 10px auto;
        padding: 20px;
        border-radius: 8px;
    }
}