@media (max-width: 768px) {
    .main-title {
        font-size: 1.8rem;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
        padding: 0 10px;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .letter-container {
        padding: 25px;
    }
    
    .letter-body {
        font-size: 1rem;
    }
    
    .final-message {
        font-size: 1.2rem;
    }
    
    .btn-open {
        padding: 14px 35px;
        font-size: 1.1rem;
    }
    
    .nav-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .btn-back,
    .btn-next,
    .btn-home {
        width: 80%;
        text-align: center;
    }
    
    .music-btn {
        bottom: 15px;
        right: 15px;
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .modal-content {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .gallery-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    
    .hero {
        padding: 25px 15px;
    }
    
    .main-title {
        font-size: 1.5rem;
    }
    
    .reason-card {
        min-height: 120px;
        padding: 20px;
    }
}