/* ===========================
   FIX OVERFLOW TOÀN TRANG
=========================== */
html, body {
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
}

/* ============================================================
   MOBILE BREAKPOINT (< 480px)
   ============================================================ */
@media (max-width: 480px) {
    .header {
        padding: 14px 20px;
    }

    .logo-img {
        height: 40px;
    }

    .main-menu {
        font-size: 13px;
    }

    .main-menu li {
        margin-right: 10px;
    }

    .nav-actions {
        gap: 10px;
    }

    .theme-toggle {
        width: 18px;
        height: 18px;
    }

    .hamburger-menu {
        width: 20px;
        height: 16px;
    }

    .hamburger-menu.active .bar:nth-child(1) {
        transform: rotate(-45deg) translate(-4px, 6px);
    }

    .hamburger-menu.active .bar:nth-child(3) {
        transform: rotate(45deg) translate(-4px, -6px);
    }

    .dropdown-menu {
        top: 55px;
        min-width: 120px;
        padding: 6px 8px;
    }

    .dropdown-menu li {
        padding: 6px 16px;
    }

    .sub-item {
        font-size: 13px;
    }

    .project-acb { padding: 12px 16px; font-size: 15px; }
    .project-acb h1 { font-size: 19px; }
    .project-acb h2 { font-size: 17px; }
    .project-acb h3 { font-size: 15px; }
    .project-acb h4 { font-size: 14px; }
    .project-acb img, .image-review-wrapper img { max-width: 100%; width: 100%; border-radius: 10px; }
    .image-gradient-wrapper .project-video, .video-wrapper-portrait .project-video { width: 85%; border-radius: 10px; }

    .main-footer { margin-top: 50px; }
    .logo-footer { padding: 20px 16px 10px; }
    .logo-footer .logo-img { height: 34px; }
    .back-to-top { position: static; display: block; text-align: right; padding: 0 16px 10px; font-size: 13px; }
    .footer-bar { flex-direction: column; align-items: flex-start; padding: 8px 16px 16px; gap: 5px; font-size: 11px; }
}

/* ============================================================
   MOBILE BREAKPOINT (481px – 767px)
   ============================================================ */
@media (min-width: 481px) and (max-width: 767px) {
    .header {
        padding: 16px 28px;
    }

    .logo-img {
        height: 46px;
    }

    .main-menu {
        font-size: 15px;
    }

    .main-menu li {
        margin-right: 16px;
    }

    .nav-actions {
        gap: 12px;
    }

    .theme-toggle {
        width: 20px;
        height: 20px;
    }

    .dropdown-menu {
        top: 58px;
        padding: 8px 10px;
    }

    .dropdown-menu li {
        padding: 6px 24px;
    }

    .sub-item {
        font-size: 14px;
    }

    .project-acb { padding: 16px 28px; font-size: 16px; }
    .project-acb h1 { font-size: 21px; }
    .project-acb h2 { font-size: 18px; }
    .project-acb h3 { font-size: 16px; }
    .project-acb img, .image-review-wrapper img { max-width: 100%; width: 100%; border-radius: 12px; }
    .image-gradient-wrapper .project-video, .video-wrapper-portrait .project-video { width: 85%; border-radius: 12px; }

    .main-footer { margin-top: 60px; }
    .logo-footer { padding: 24px 28px 10px; }
    .back-to-top { position: static; display: block; text-align: right; padding: 0 28px 10px; font-size: 14px; }
    .footer-bar { flex-direction: column; align-items: flex-start; padding: 8px 28px 16px; gap: 5px; font-size: 12px; }
}

/* ============================================================
   TABLET BREAKPOINT (768px – 1023px)
   ============================================================ */
@media (min-width: 768px) and (max-width: 1023px) {
    .header {
        padding: 20px 40px;
    }

    .logo-img {
        height: 55px;
    }

    .main-menu {
        font-size: 18px;
    }

    .main-menu li {
        margin-right: 25px;
    }

    .nav-actions {
        gap: 18px;
    }

    .hamburger-menu {
        width: 22px;
        height: 19px;
    }

    .hamburger-menu.active .bar:nth-child(1) {
        transform: rotate(-45deg) translate(-4.5px, 7.5px);
    }

    .hamburger-menu.active .bar:nth-child(3) {
        transform: rotate(45deg) translate(-4.5px, -7.5px);
    }

    .dropdown-menu {
        top: 65px;
        min-width: 140px;
    }

    .dropdown-menu li {
        padding: 8px 60px;
    }

    .sub-item {
        font-size: 15px;
    }

    .project-acb { padding: 20px 60px; font-size: 17px; }
    .project-acb h1 { font-size: 24px; }
    .project-acb h2 { font-size: 21px; }
    .project-acb h3 { font-size: 18px; }
    .project-acb img, .image-review-wrapper img { max-width: 88%; width: 88%; }
    .image-gradient-wrapper .project-video, .video-wrapper-portrait .project-video { width: 85%; }

    .main-footer { margin-top: 80px; }
    .logo-footer { padding: 35px 40px; }
    .footer-bar { padding: 50px 40px 0; }
    .back-to-top { top: 35px; right: 40px; font-size: 17px; }
}

/* ============================================================
   DESKTOP BREAKPOINT (1024px and up)
   ============================================================ */
@media (min-width: 1024px) {
    .header {
        padding: 20px 60px;
    }

    .logo-img {
        height: 65px;
    }

    .main-menu {
        font-size: 20px;
    }

    .main-menu li {
        margin-right: 30px;
    }

    .nav-actions {
        gap: 20px;
    }

    .hamburger-menu {
        width: 24px;
        height: 20px;
    }

    .hamburger-menu.active .bar:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 8px);
    }

    .hamburger-menu.active .bar:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -8px);
    }

    .dropdown-menu {
        top: 70px;
        min-width: 150px;
    }

    .dropdown-menu li {
        padding: 8px 85px;
    }

    .sub-item {
        font-size: 16px;
    }

    .main-footer {
        height: 250px;
        margin-top: 100px;
    }

    .logo-footer {
        padding: 40px 60px;
    }

    .footer {
        padding: 60px 60px 0px;
    }

    .back-to-top {
        top: 40px;
        right: 60px;
        font-size: 18px;
    }
}

/* ============================================================
   LARGE DESKTOP (1440px and up)
   ============================================================ */
@media (min-width: 1440px) {

    .header {
        padding: 20px 60px;
    }

    .logo-img {
        height: 65px;
    }

    .main-footer {
        height: 250px;
        margin-top: 100px;
    }

    .logo-footer {
        padding: 40px 60px;
    }

    .footer {
        padding: 60px 60px 0px;
    }

    .back-to-top {
        top: 40px;
        right: 60px;
        font-size: 18px;
    }

}

/* ============================================================
   PRINT
   ============================================================ */
@media print {
    .header,
    .hamburger-menu,
    .dropdown-menu,
    .back-to-top {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    .main-footer {
        background: #eee;
    }
}

/* ===========================
   MOBILE dropdown right fix
=========================== */
@media (max-width: 767px) {
    .dropdown-menu { right: 20px; }
}