/* ==========================================
   DESKTOP & LARGE DISPLAYS (1200px+)
========================================== */

@media (min-width: 1400px) {
    .container {
        max-width: 1280px;
    }

    .hero h1 {
        font-size: 4.2rem;
    }
}

@media (max-width: 1200px) {
    .hero-container {
        gap: 40px;
    }

    .about-wrapper {
        grid-template-columns: 340px 1fr;
        gap: 40px;
    }

    .contact-wrapper {
        grid-template-columns: 300px 1fr;
        gap: 36px;
    }
}

/* ==========================================
   TABLETS & MEDIUM SCREENS (992px)
========================================== */

@media (max-width: 992px) {
    section {
        padding: 70px 0;
    }

    .section-title h2 {
        font-size: 2rem;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero h1 {
        font-size: 3rem;
    }

    .hero p {
        margin-inline: auto;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-social {
        justify-content: center;
    }

    .image-wrapper {
        width: 320px;
        height: 320px;
    }

    .about-wrapper {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-image {
        max-width: 340px;
        margin: 0 auto;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    /* Timeline centered on mobile/tablet */
    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        margin-left: 0;
        padding-left: 50px;
        padding-right: 0;
    }

    .timeline-item.right {
        margin-left: 0;
        padding-left: 50px;
    }
}

/* ==========================================
   MOBILE DEVICES (768px)
========================================== */

@media (max-width: 768px) {
    body.menu-open {
        overflow: hidden;
    }

    .menu-btn {
        display: block;
        z-index: 999;
    }

    .menu-btn span {
        transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
    }

    .menu-btn.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-btn.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .nav-links {
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: var(--background);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-radius: 0 0 var(--radius-lg) var(--radius-lg);
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        opacity: 0;
        visibility: hidden;
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .hero h1 {
        font-size: 2.4rem;
    }

    .hero h2 {
        font-size: 1.3rem;
    }

    .image-wrapper {
        width: 260px;
        height: 260px;
    }

    .about-info {
        grid-template-columns: 1fr;
    }

    .skills-grid,
    .project-grid,
    .qa-grid,
    .certificate-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .resume-box {
        padding: 40px 24px;
    }

    .resume-box h2 {
        font-size: 1.8rem;
    }

    #backToTop {
        width: 40px;
        height: 40px;
        right: 20px;
        bottom: 20px;
    }
}

/* ==========================================
   SMALL MOBILE DEVICES (480px)
========================================== */

@media (max-width: 480px) {
    .container {
        width: 90%;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero h2 {
        font-size: 1.15rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

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

    .btn {
        padding: 12px 20px;
    }

    .contact-item {
        flex-direction: column;
        text-align: center;
    }
}