@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@700&display=swap');

    body {
        font-family: 'Roboto', sans-serif;
        background-color: #f0f0f0;
        margin: 0;
        padding: 20px;
    }
    .board {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
        max-width: 1200px;
        margin: 0 auto;
    }
    .box {
        background-color: #ffffff;
        border-radius: 15px;
        padding: 30px;
        box-shadow: 0 6px 10px rgba(0, 0, 0, 0.1);
        transition: transform 0.3s ease;
    }
    .box:hover {
        transform: translateY(-10px);
    }
    h2 {
        color: #333;
        margin-top: 0;
        font-size: 24px;
        text-transform: uppercase;
    }
    p {
        color: #666;
        margin-bottom: 20px;
        font-size: 18px;
    }
    .tips {
        margin-top: 20px;
    }
    .tip {
        background-color: #e0e0e0;
        color: #333;
        padding: 10px;
        border-radius: 10px;
        margin-bottom: 10px;
        font-size: 16px;
    }


.hero-image {
    display: block;
    width: min(1200px, 100%);
    height: clamp(220px, 38vw, 430px);
    object-fit: cover;
    object-position: center 48%;
    margin: 0 auto 30px;
    border-radius: 18px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
}

@media (max-width: 640px) {
    body { padding: 14px; }
    .hero-image { height: 230px; margin-bottom: 20px; border-radius: 12px; }
    .board { grid-template-columns: 1fr; gap: 16px; }
}