@media (max-width: 576px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer__grid {
        grid-template-columns: 1fr;
    }
    
    .hero__buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    .page-hero {
        padding: var(--spacing-2xl) 0;
    }
    
    .page-hero__title {
        font-size: var(--font-size-2xl);
    }
    
    .page-hero__desc {
        font-size: var(--font-size-base);
    }
    
    .content-block {
        padding: var(--spacing-lg);
    }
    
    .gold-price-card {
        padding: var(--spacing-lg);
    }
}

@media (min-width: 577px) and (max-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-step:nth-child(2)::after {
        display: none;
    }
}

@media (min-width: 769px) and (max-width: 992px) {
    .nav__list {
        gap: var(--spacing-lg);
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer__grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .process-steps {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .process-step:nth-child(3)::after {
        display: none;
    }
}

@media (min-width: 993px) and (max-width: 1200px) {
    .footer__grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1201px) {
    .container {
        max-width: 1140px;
    }
}

@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-white);
    z-index: var(--z-modal);
    padding: var(--spacing-2xl);
    flex-direction: column;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
}

.mobile-menu.is-open {
    transform: translateX(0);
}

.mobile-menu__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
}

.mobile-menu__close {
    background: none;
    border: none;
    font-size: var(--font-size-3xl);
    cursor: pointer;
    color: var(--text-primary);
}

.mobile-menu__list {
    flex: 1;
}

.mobile-menu__item {
    border-bottom: 1px solid var(--bg-light);
}

.mobile-menu__link {
    display: block;
    padding: var(--spacing-lg) 0;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.mobile-menu__submenu {
    padding-left: var(--spacing-lg);
}

.mobile-menu__submenu-link {
    display: block;
    padding: var(--spacing-sm) 0;
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5);
    z-index: var(--z-modal-backdrop);
}

.mobile-overlay.is-visible {
    display: block;
}