/* =============================================
   DEMA MONTAGE — Responsive stylesheet
   Mobile-first: 480px, 768px, 1024px, 1200px
   ============================================= */

/* ============ MOBILE (<= 480px) ============ */
@media (max-width: 480px) {
    :root {
        --header-height: 64px;
    }

    .section {
        padding: 64px 0;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 12px;
    }

    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .stat-number,
    .stat-text {
        font-size: 1.5rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .service-card {
        padding: 24px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .about-placeholder {
        aspect-ratio: 16/9;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .contact-form-wrapper {
        padding: 24px;
    }

    .team-cta {
        padding: 28px 20px;
    }

    .team-cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .reference-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 8px;
    }

    .back-to-top {
        bottom: 16px;
        right: 16px;
        width: 42px;
        height: 42px;
    }

    .cookie-notice-content {
        flex-direction: column;
        gap: 12px;
    }
}

/* ============ TABLET (481px - 768px) ============ */
@media (min-width: 481px) and (max-width: 768px) {
    :root {
        --header-height: 70px;
    }

    .section {
        padding: 72px 0;
    }

    .section-title {
        font-size: 2rem;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .reference-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .footer-grid .footer-col:first-child {
        grid-column: 1 / -1;
    }
}

/* ============ LARGE TABLET / SMALL DESKTOP (769px - 1024px) ============ */
@media (min-width: 769px) and (max-width: 1024px) {
    .section {
        padding: 80px 0;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-grid {
        gap: 40px;
    }

    .reference-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1.2fr 1fr 1fr;
        gap: 32px;
    }

    .hero-stats {
        gap: 16px;
    }
}

/* ============ DESKTOP (>= 1025px) ============ */
@media (min-width: 1025px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .reference-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============ LARGE DESKTOP (>= 1200px) ============ */
@media (min-width: 1200px) {
    .container {
        padding: 0 32px;
    }
}

/* ============ MOBILE NAVIGATION (<= 1024px) ============ */
@media (max-width: 1024px) {
    .hamburger {
        display: flex;
    }

    .main-nav {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: min(320px, 85vw);
        background: var(--color-white);
        z-index: 1050;
        transform: translateX(-100%);
        transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: var(--shadow-lg);
        display: flex;
        flex-direction: column;
        justify-content: center;
        padding: 48px 40px;
    }

    .main-nav.is-open {
        transform: translateX(0);
    }

    .mobile-overlay {
        display: block;
    }

    .mobile-overlay.is-open {
        opacity: 1;
        pointer-events: all;
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 28px;
    }

    .nav-link {
        font-size: 1.25rem;
        color: var(--color-text-dark);
        font-weight: 500;
    }

    .nav-link.active,
    .nav-link:hover {
        color: var(--color-accent);
    }

    .nav-link::after {
        height: 2px;
    }
}