:root {
    --vn-gold: #d4b445;
    --vn-red: #9a1f1f;
    --text-dark: #333;
}

.intro-container {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 50px;
    padding: 60px;
    max-width: 1100px;
    margin: 0 auto;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* HERO */
.intro-hero {
    background-color: #8B0000;
    color: white;
    text-align: center;
    padding: 60px 40px;
}

.intro-hero-label {
    font-size: 11px;
    letter-spacing: 3px;
    text-transform: uppercase;
    opacity: 0.75;
    margin-bottom: 12px;
}

.intro-hero h2 {
    font-size: 46px;
    font-weight: bold;
    margin-bottom: 12px;
}

.intro-hero p {
    font-size: 18px;
    opacity: 0.85;
}

/* MARQUEE */
.marquee {
    background: #8B0000;
    color: white;
    padding: 10px;
    overflow: hidden;
    white-space: nowrap;
}

.marquee span {
    display: inline-block;
    padding-left: 100%;
    animation: scrollText 18s linear infinite;
    font-weight: bold;
    font-size: 14px;
}

.map-box {
    flex: 1;
    max-width: 200px; 
}

.vietnam-svg {
    width: 100%;
    height: auto;
    filter: drop-shadow(10px 10px 15px rgba(0,0,0,0.1));
}

.region {
    fill: var(--vn-gold);
    stroke: #fff;
    stroke-width: 0.8;
    transition: all 0.3s ease;
    cursor: pointer;
}

.region.active {
    fill: var(--vn-red);
    filter: brightness(1.1);
}

.content-box {
    flex: 1.2;
    padding-top: 40px;
}

.content-box p {
    font-size: 1.2rem;
    line-height: 1.7;
    color: var(--text-dark);
    margin-top: 20px;
    transition: opacity 0.3s ease;
}

.content-box h2 {
    color: var(--vn-red);
    font-size: 2.2rem;
    margin-top: 0;
    text-transform: uppercase;
    border-bottom: 3px solid var(--vn-red);
    padding-bottom: 10px;
    display: inline-block;
}


.instruction {
    color: #999;
    font-style: italic;
    margin-bottom: 10px;
    display: block;
}

/* Phrase Guide */
.phrase-guide {
    max-width: 1000px;
    margin: 80px auto;
    padding: 40px;
    background: rgba(255,255,255,0.75);
    border-radius: 20px;
    backdrop-filter: blur(5px);
}

.phrase-guide h2 {
    text-align: center;
    color: #8B0000;
    font-size: 42px;
    margin-bottom: 10px;
}

.guide-subtitle {
    text-align: center;
    color: #555;
    margin-bottom: 40px;
    font-size: 18px;
}

/* TABLE */
.phrase-table {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 15px;
}

/* HEADERS */
.phrase-header {
    background: #8B0000;
    color: white;
    padding: 18px;
    font-weight: bold;
    text-align: center;
    border-radius: 12px;
    font-size: 18px;
}

/* CELLS */
.phrase-item {
    background: rgba(255,255,255,0.85);
    padding: 18px;
    text-align: center;
    border-radius: 12px;
    transition: 0.3s;
    font-size: 17px;
}

/* HOVER EFFECT */
.phrase-item:hover {
    transform: translateY(-4px);
    background: white;
    box-shadow: 0 8px 15px rgba(0,0,0,0.1);
}

/* SPECIAL TEXT */
.vietnamese {
    color: #8B0000;
    font-weight: bold;
    font-size: 19px;
}

.pronunciation {
    color: #444;
    font-style: italic;
}

/* MOBILE */
@media (max-width: 700px) {
    .phrase-table {
        grid-template-columns: 1fr;
    }

    .phrase-header {
        display: none;
    }
}

/* INFORMATION */
.Information{
    margin-left: 250px;
    margin-right: 250px;
    margin-top: 10px;
    margin-bottom:10px;
    background: #8B0000;
    color: white;
    padding: 18px;
    font-weight: bold;
    text-align: center;
    border-radius: 12px;
    font-size: 18px;
}

@keyframes scrollText {
    0%   { transform: translateX(0); }
    100% { transform: translateX(-100%); }
}