body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #f8fafc;
}
.about-section, .vision-section, .contact-section {
    border-radius: 10px;
}
.card .circle {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
}
.card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    transform: translateY(-4px);
    transition: 0.2s;
}
.footer-section {
    background: #f1f6fa;
    border-radius: 10px 10px 0 0;
}
.footer-section .form-control:focus {
    box-shadow: none;
    border-color: #0d6efd;
}
.nav-link.active, .nav-link:focus, .nav-link:hover {
    color: #0d6efd !important;
}
@media (max-width: 767.98px) {
    .about-section .about-img,
    .mission-section .mission-img,
    .vision-section .vision-img {
        min-height: 120px;
        margin-bottom: 1rem;
    }
    .about-section .col-12,
    .mission-section .col-12,
    .vision-section .col-12 {
        margin-bottom: 1rem;
    }
    .core-value-section .card {
        margin-bottom: 1rem;
    }
}

/* Responsive 2-column section */
.about-section .about-img,
.mission-section .mission-img,
.vision-section .vision-img {
    min-height: 140px;
    border-radius: 15px;
    opacity: 0.2;
}

/* Căn giữa menu text */
.navbar-nav {
    justify-content: center !important;
    align-items: center !important;
}
.navbar-nav .nav-link {
    text-align: center;
    padding-left: 3.5rem;
    padding-right: 3.5rem;
}
@media (max-width: 991.98px) {
    .navbar-nav {
        align-items: flex-start !important;
        justify-content: flex-start !important;
    }
    .navbar-nav .nav-link {
        text-align: left;
        padding-left: 2rem;
        padding-right: 2rem;
        font-size: 1.1rem;
    }
}

/* Offcanvas menu mobile */
.offcanvas-body .navbar-nav {
    align-items: center;
    justify-content: center;
}
.offcanvas-body .nav-link {
    font-size: 1.2rem;
    padding: 0.75rem 0;
}
.offcanvas-header {
    border-bottom: 1px solid #e3f6fd;
}