@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Playfair+Display:ital,wght@0,600;0,700;1,600&display=swap');

:root {
    --primary: #f43f5e;
    --primary-light: #fb7185;
    --primary-dark: #e11d48;
    --accent: #10b981;
    --bg-dark: #090d16;
    --card-bg: rgba(15, 23, 42, 0.82);
    --card-border: rgba(255, 255, 255, 0.12);
    --text-main: #f8fafc;
    --text-muted: #cbd5e1;
    --text-dim: #94a3b8;
    --glass-glow: 0 10px 32px 0 rgba(0, 0, 0, 0.45);
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-dark);
    line-height: 1.7;
    position: relative;
    min-height: 100vh;
    background-image: url('https://thamhiemmekong.com/wp-content/uploads/2019/12/lang-hoa-sa-dec-4.jpg');
    background-attachment: fixed;
    background-size: cover;
    background-position: center;
}

/* Background darken overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, 
        rgba(9, 13, 22, 0.85) 0%, 
        rgba(15, 23, 42, 0.92) 50%, 
        rgba(9, 13, 22, 0.97) 100%);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 0;
}

/* Modern Navigation Bar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 40px;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--card-border);
    transition: var(--transition);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-main);
    font-weight: 700;
    font-size: 1.15rem;
}

.nav-brand i {
    color: var(--primary-light);
    font-size: 1.4rem;
    filter: drop-shadow(0 0 8px rgba(244, 63, 94, 0.6));
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 12px;
    list-style: none;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.92rem;
    padding: 7px 15px;
    border-radius: 9999px;
    transition: var(--transition);
    border: 1px solid transparent;
}

.nav-links a:hover,
.nav-links a.active {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
}

.nav-links a.active {
    background: rgba(244, 63, 94, 0.2);
    border-color: rgba(244, 63, 94, 0.4);
    color: #fff;
}

.audio-btn {
    background: rgba(244, 63, 94, 0.15);
    border: 1px solid rgba(244, 63, 94, 0.35);
    color: var(--primary-light);
    padding: 7px 15px;
    border-radius: 9999px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.audio-btn:hover {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(244, 63, 94, 0.4);
}

/* Container Wrapper */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 110px 24px 70px;
    position: relative;
    z-index: 1;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.container.show {
    opacity: 1;
    transform: translateY(0);
}

/* Hero Header Card */
.hero-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 48px 36px;
    text-align: center;
    box-shadow: var(--glass-glow);
    margin-bottom: 36px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: relative;
    overflow: hidden;
}

.hero-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary) 0%, #fbbf24 100%);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    border-radius: 9999px;
    background: rgba(244, 63, 94, 0.15);
    border: 1px solid rgba(244, 63, 94, 0.35);
    color: var(--primary-light);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

header {
    font-family: 'Playfair Display', serif;
    font-size: 2.8rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 14px;
    line-height: 1.25;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 20px;
}

/* Content Sections */
.content-section {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 36px;
    box-shadow: var(--glass-glow);
    margin-bottom: 32px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition);
}

.content-section:hover {
    border-color: rgba(244, 63, 94, 0.3);
}

.section-title {
    font-size: 1.55rem;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.section-title i {
    color: var(--primary-light);
    font-size: 1.35rem;
}

p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-muted);
    margin-bottom: 20px;
    text-align: justify;
}

p:last-child {
    margin-bottom: 0;
}

/* Highlight Stats / Chips */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin: 24px 0;
}

.stat-item {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 14px;
    padding: 16px;
    text-align: center;
    transition: var(--transition);
}

.stat-item:hover {
    background: rgba(244, 63, 94, 0.08);
    border-color: rgba(244, 63, 94, 0.25);
    transform: translateY(-3px);
}

.stat-number {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-light);
    display: block;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Image Row & Gallery */
.image-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin: 24px 0 10px;
}

.image-row .img {
    border-radius: 16px;
    overflow: hidden;
    height: 220px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    position: relative;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.image-row .img.show {
    opacity: 1;
    transform: translateY(0);
}

.image-row .img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.image-row .img:hover img {
    transform: scale(1.08);
}

/* Food / Cuisine Grid */
.food-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 24px 0;
}

.food-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 20px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.food-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(244, 63, 94, 0.35);
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.4);
}

.food-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.food-title i {
    color: var(--primary-light);
}

.food-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.65;
    text-align: left;
}

/* Google Maps Card */
.map-container {
    border-radius: 16px;
    overflow: hidden;
    margin: 20px 0;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--card-border);
}

.map-container iframe {
    width: 100% !important;
    height: 380px !important;
    display: block;
    border: 0;
}

/* Back to Top Button */
#topBtn {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: none;
    width: 48px;
    height: 48px;
    background: rgba(244, 63, 94, 0.85);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 8px 20px rgba(244, 63, 94, 0.4);
    z-index: 99;
    backdrop-filter: blur(8px);
    font-size: 1.1rem;
    transition: var(--transition);
}

#topBtn:hover {
    background: var(--primary-dark);
    transform: translateY(-3px) scale(1.08);
    box-shadow: 0 12px 25px rgba(244, 63, 94, 0.6);
}

/* Bottom Navigation / Next Page */
.page-nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--card-border);
}

.page-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text-main);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
}

.page-nav-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(244, 63, 94, 0.35);
}

/* Audio Player */
audio {
    display: none; /* Controlled via header button */
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        padding: 12px 18px;
        flex-direction: column;
        gap: 10px;
    }
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 6px;
    }
    .nav-links a {
        font-size: 0.8rem;
        padding: 5px 10px;
    }
    .container {
        padding-top: 150px;
    }
    header {
        font-size: 2rem;
    }
    .content-section {
        padding: 24px 18px;
    }
    p {
        font-size: 0.98rem;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
}