:root {
    --red-tet: #d32f2f;
    --gold: #ffeb3b;
    --green-tet: #2e7d32;
    --bg-light: #fff5f5;
    --shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

body {
    margin: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: var(--bg-light);
    color: #333;
}

.navbar {
    background: var(--red-tet);
    padding: 15px;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar a {
    color: #fff;
    text-decoration: none;
    margin: 0 15px;
    font-weight: bold;
    text-transform: uppercase;
    font-size: 14px;
    transition: 0.3s;
}

.navbar a:hover {
    color: var(--gold);
}

.hero-banner {
    height: 400px;
    background: linear-gradient(rgba(0, 0, 0, .5), rgba(0, 0, 0, .5)),
        url('./img/bia-chinh.jpg') center/cover no-repeat;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, .8);
}

.hero-banner h1 {
    font-size: clamp(2.5rem, 8vw, 4rem);
    margin: 0;
    color: var(--gold);
    text-transform: uppercase;
}

.hero-banner p {
    font-size: 1.5rem;
    color: #fff;
    margin-top: 10px;
}

.container {
    width: 95%;
    max-width: 1800px;
    margin: 0 auto;
    padding: 20px 0;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.grid-item {
    background: #fff;
    border: 2px solid #000;
    border-radius: 25px;
    overflow: hidden;
    color: inherit;
    text-decoration: none;
    transition: .3s;
    display: flex;
    flex-direction: column;
}

.grid-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.grid-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

.item-info {
    padding: 15px;
}

.contact-box {
    background: #fef9c3;
}

.quote-section {
    text-align: center;
    font-style: italic;
    padding: 40px;
    color: var(--red-tet);
}

footer {
    background: #0e5a27;
    color: #fff;
    text-align: center;
    padding: 15px;
}

@media (max-width: 768px) {
    .content-grid {
        grid-template-columns: 1fr;
    }

    .hero-banner {
        height: 300px;
    }
}

@media (min-width: 1024px) {
    .ki-uc-container .content-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/*video youtube cua gia dinh em*/
iframe {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    border-radius: 5px;
    display: block;
}

.author-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: hsl(52, 93%, 83%);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.author-table th,
.author-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #e6e4e4;
}

.author-table th {
    background-color: #b32d2e;
    color: white;
    width: 30%;
}

.author-table tr:last-child td {
    border-bottom: none;
}