/* 1. RESET & QUY TẮC CHUNG */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-green: #2e7d32;
    --dark-green: #1b5e20;
    --primary-red: #c62828;
    --accent-yellow: #ffeb3b;
    --bg-light: #fffaf0;
    --text-dark: #333;
    --text-gray: #666;
    --shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Arial', sans-serif;
    background-color: var(--bg-light);
    line-height: 1.6;
    color: var(--text-dark);
}

/* 2. HỆ THỐNG TIÊU ĐỀ (TITLES) */
h1,
h2,
h3,
p {
    text-align: center;
    margin-bottom: 20px;
}

.title-green {
    color: var(--primary-green);
    border-bottom: 2px solid var(--primary-green);
    display: table;
    margin: 0 auto 30px;
    padding-bottom: 5px;
}

.hero-text h1 {
    font-size: clamp(2.5rem, 8vw, 4rem);
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
}

.hero-text h2 {
    font-size: clamp(1.2rem, 4vw, 2rem);
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
}

/* 3. ĐIỀU HƯỚNG (MENU) */
nav {
    background-color: var(--primary-green);
    padding: 20px;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    transition: 0.3s;
}

nav ul li a:hover {
    color: var(--accent-yellow);
}

/* 4. BANNER (HERO SECTION) */
.hero-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-banner {
    height: 80vh;
    background-image: url('./img/tet\ festival\ vietnam.jpg');
}

/* 5. BỐ CỤC NỘI DUNG (LAYOUT) */
.container {
    max-width: 1100px;
    margin: 40px auto;
    padding: 0 20px;
}

.content-grid {
    display: flex;
    gap: 30px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.text-box,
.image-box {
    flex: 1;
    min-width: 300px;
}

/* 6. THÀNH PHẦN NỔI BẬT (CARDS & GALLERY) */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.gallery-item {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: 0.3s;
    padding: 15px;
    align-items: center;
}

.gallery-item:hover {
    transform: translateY(-5px);
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 5px;
}

/* 7. NÚT & ĐẶC BIỆT */
.btn {
    display: inline-block;
    background: var(--primary-red);
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    transition: 0.3s;
    width: fit-content;
    /* Nút chỉ rộng bằng chữ */
}

.btn:hover {
    background: var(--primary-green);
}

.quote {
    background-color: var(--primary-red);
    color: white;
    padding: 40px;
    font-style: italic;
    font-size: 1.5rem;
    text-align: center;
}

.local-special {
    background-color: #fff3e0;
    padding: 30px;
    border: 2px dashed var(--primary-red);
    border-radius: 10px;
}

/* 8. VIDEO & FOOTER */
.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    margin: 20px 0;
}

.video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 8px;
    border: 3px solid var(--primary-red);
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 8px;
    border: 3px solid var(--primary-red);
    /* Đây là cái khung đỏ bạn muốn */
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    /* Thêm chút bóng đổ cho nổi bật */
}

footer {
    background: var(--dark-green);
    color: white;
    padding: 20px;
    text-align: center;
}
/* Ảnh lớn tràn hết độ rộng container */
.featured-image-container {
    width: 70%;
    Height: 50%;
    margin: 0 auto 25px;
}

.large-img {
    width: 100%;
    height: 50%;
    border-radius: 18px;
}