body {
    font-family: 'Segoe UI', 'Arial', sans-serif;
    background: #fffbea;
    color: #2d2d2d;
    margin: 0;
    padding: 0;
}
.custom-img {
    display: block;
    margin: 16px auto;
    max-width: 90vw;      /* 90% chiều rộng màn hình */
    width: 300px;         /* hoặc 100% nếu muốn co dãn */
    max-height: 400px;    /* Giới hạn chiều cao */
    object-fit: cover;    /* Crop ảnh cho vừa khung */
    border-radius: 16px;
    box-shadow: 0 2px 16px rgba(0,0,0,0.08);
    background: #fff;
}

main {
    max-width: 750px;
    margin: 40px auto;
    background: #fff;
    padding: 36px 25px 40px 25px;
    border-radius: 18px;
    box-shadow: 0 8px 32px rgba(181, 150, 89, 0.15);
}

h1 {
    color: #b59659;
    font-size: 2.1rem;
    margin-bottom: 20px;
    text-align: center;
    letter-spacing: 0.5px;
}

h2 {
    color: #587a49;
    margin-top: 36px;
    margin-bottom: 12px;
    font-size: 1.3rem;
    letter-spacing: 0.2px;
}

p, ul, li {
    font-size: 1.05rem;
    line-height: 1.7;
    text-align: justify;
}

ul {
    margin-left: 28px;
}

blockquote {
    margin: 18px 0 18px 24px;
    padding: 10px 22px;
    border-left: 4px solid #b59659;
    background: #f8f6e9;
    font-style: italic;
    color: #5a5a50;
    border-radius: 0 8px 8px 0;
}

strong {
    color: #b59659;
}

.banner {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}
.banner-image {
    width: 100%;
    max-height: 320px;
    object-fit: cover;
    display: block;
    border-radius: 8px;
}
.banner-title {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #c2a16d;
    background: rgba(255,255,255,0.85);
    padding: 16px 32px;
    border-radius: 12px;
    font-size: 2em;
    font-weight: bold;
    text-align: center;
    width: 90%;
    box-sizing: border-box;
    text-shadow: 2px 2px 8px #fff, 0 1px 8px #c2a16d;
}

@media (max-width: 900px) {
    main {
        max-width: 99vw;
        padding: 16px 4vw;
    }
    h1 {
        font-size: 1.3rem;
    }
    h2 {
        font-size: 1.07rem;
    }
}