body, #main-content {
    background-color: #6B4F48 !important;
}
.hero-bg {
    background-image: url('../images/classroom.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}
.hero-overlay {
    background-color: rgba(0, 0, 0, 0.7);
}
.instruction-modal-backdrop {
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
}

/* ===== MODAL RESPONSIVE ===== */
#instructionModal .modal-box {
    background: #fff;
    border-radius: 1rem;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    width: 100%;
    max-width: 580px;
    margin: 1rem;
    padding: 1.5rem;
    border-top: 4px solid #6B4F48;
    max-height: 90vh;
    overflow-y: auto;
}
@media (max-width: 575.98px) {
    #instructionModal .modal-box {
        margin: 0.75rem;
        padding: 1.25rem;
        border-radius: 0.75rem;
    }
    #instructionModal .modal-box h2 {
        font-size: 1rem !important;
    }
    #instructionModal .modal-box .badge {
        font-size: 0.6rem !important;
        padding: 0.35rem 0.6rem !important;
    }
    #instructionModal .modal-box img {
        width: 36px !important;
        height: 36px !important;
    }
    #instructionModal .modal-box .instruction-list {
        max-height: 180px;
        font-size: 0.8rem;
    }
}

/* ===== HERO RESPONSIVE ===== */
@media (max-width: 575.98px) {
    #hero-section {
        min-height: 75vh !important;
    }
    #hero-section h2 {
        font-size: 1.6rem !important;
        line-height: 1.3 !important;
    }
    #hero-section .lead {
        font-size: 0.85rem !important;
    }
    #hero-section .hero-buttons .btn {
        padding: 0.65rem 1.25rem !important;
        font-size: 0.85rem !important;
    }
    #hero-section .hero-badge {
        font-size: 0.65rem !important;
        padding: 0.4rem 0.8rem !important;
    }
}
@media (min-width: 576px) and (max-width: 767.98px) {
    #hero-section h2 {
        font-size: 2.2rem !important;
    }
    #hero-section .hero-buttons .btn {
        padding: 0.7rem 1.5rem !important;
        font-size: 0.9rem !important;
    }
}