body {
    padding-top: 56px;
}

.hero-section {
    background: url('images/hero.jpg') no-repeat center center;
    background-size: cover;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.hero-section h1 {
    font-size: 4rem;
    font-weight: bold;
}

.hero-section .lead {
    font-size: 1.5rem;
}

#map {
    width: 100%;
    height: 400px;
    background-color: #eee;
}

/* Floating contact bar */
.contact-bar {
    position: fixed;
    right: 16px;
    bottom: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 2000;
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    box-shadow: 0 6px 12px rgba(0,0,0,0.12);
    transition: transform .12s ease, box-shadow .12s ease;
}

.contact-btn:hover { transform: translateY(-3px); box-shadow: 0 10px 18px rgba(0,0,0,0.16); }

/* Zalo blue */
.contact-btn.zalo {
    background: linear-gradient(180deg,#2ea5f6,#2b9be6);
}

/* Phone green */
.contact-btn.phone {
    background: linear-gradient(180deg,#28a745,#218838);
}

/* Hide text on very small screens, keep accessible via aria-label */
@media (max-width: 420px) {
    .contact-btn { width:44px; height:44px; font-size:12px; }
}