.hero-section {
    background-color: #fdfaf6;
    padding: 20px 0;
    text-align: center;
    border-bottom: 2px solid #e6e1d8;
}
.hero-section h1 {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    color: #6b4e31;
    margin-bottom: 10px;
    animation: fadeInDown 1s ease-in-out;
}
.hero-section p {
    font-size: 1.1rem;
    color: #5a5a5a;
    max-width: 600px;
    margin: 0 auto;
    animation: fadeInUp 1s ease-in-out;
}
.letter-container {
    max-width: 1200px;
    margin: 20px auto;
    background: #fff;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    border: 1px solid #e6e1d8;
    animation: fadeIn 1.5s ease-in-out;
}
.content-section {
    padding: 15px;
}
.content-section h2 {
    font-family: 'Playfair Display', serif;
    font-size: 1.6rem;
    color: #6b4e31;
    margin-bottom: 15px;
    font-style: italic;
}
.content-section div {
    font-family: 'Lora', serif;
    font-size: 1rem;
    line-height: 1.6;
    color: #4a4a4a;
}
.media-section {
    padding: 15px;
}
.carousel-item img {
    height: 250px;
    object-fit: cover;
    border-radius: 10px;
    border: 1px solid #e6e1d8;
}
.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 10px;
    border: 1px solid #e6e1d8;
}
.video-container iframe,
.video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
/* Đảm bảo hai cột cân đối */
.letter-container .row {
    display: flex;
    align-items: stretch;
}
.letter-container .col-md-6 {
    display: flex;
    flex-direction: column;
    justify-content: center;
}
/* Hiệu ứng animation */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
/* Responsive */
@media (max-width: 767px) {
    .hero-section h1 {
        font-size: 1.8rem;
    }
    .hero-section p {
        font-size: 1rem;
    }
    .letter-container {
        padding: 15px;
        margin: 10px;
    }
    .carousel-item img {
        height: 150px;
    }
    .letter-container .row {
        flex-direction: column;
    }
    .letter-container .col-md-6 {
        justify-content: flex-start;
    }
    .content-section h2 {
        font-size: 1.4rem;
    }
    .content-section div {
        font-size: 0.9rem;
    }
}