/* ========== MOBILE & FULLSCREEN RESPONSIVE ========== */
html {
    box-sizing: border-box;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    min-height: 100%;
}
*, *::before, *::after {
    box-sizing: inherit;
}

html, body {
    overflow-x: hidden;
    max-width: 100vw;
    min-height: 100vh;
}
body {
    overflow-y: auto !important;
    overflow-x: hidden !important;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: auto;
    touch-action: pan-y;
    position: relative;
}

img, video {
    max-width: 100%;
    height: auto;
}
iframe {
    max-width: 100%;
}

/* Safe area for notched devices (iPhone X+) */
@supports (padding: max(0px)) {
    body {
        padding-left: max(0px, env(safe-area-inset-left));
        padding-right: max(0px, env(safe-area-inset-right));
        padding-bottom: max(0px, env(safe-area-inset-bottom));
    }
}

/* Tablet & below - menu 3 cột */
@media (max-width: 1024px) {
    header .nav nav {
        width: 100%;
        margin: 0 !important;
    }
    header .nav nav ul {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
        padding: 0;
        margin: 0;
        list-style: none;
    }
    header .nav nav ul li {
        float: none !important;
        margin: 0;
        text-align: center;
    }
    header .nav nav ul li a {
        display: block;
        padding: 12px 8px !important;
        font-size: 13px !important;
        line-height: 1.3 !important;
    }
    header .nav nav ul.home-main-menu li .home-header-btn {
        min-width: 0;
        width: 100%;
        height: 64px;
        border-radius: 10px;
    }
    header .nav nav ul li a i {
        display: block;
        margin-bottom: 4px;
    }
    #main {
        padding-left: 10px;
        padding-right: 10px;
        min-height: 100vh;
        height: auto !important;
        overflow: visible !important;
        padding-bottom: 40px;
    }
    #noidung {
        width: 100%;
        max-width: 100%;
        padding-top: 220px;
    }
    #part_left, #part_center, #part_right {
        float: none !important;
        width: 100% !important;
        max-width: 100% !important;
        margin-left: 0 !important;
    }
    .guide-karma-row {
        width: 100% !important;
        flex-wrap: wrap;
    }
    .guide-karma-row .home-quick-boxes {
        width: 100%;
        max-width: 258px;
    }
    .guide-karma-row .home-quick-boxes .home-quick-box {
        width: 100% !important;
    }
    .guide-karma-row #karma-below-news {
        flex-wrap: wrap;
        width: 100%;
    }
    .guide-karma-row .karma-below-item {
        min-width: 0;
        flex: 1 1 45%;
    }
    #menu {
        width: 100%;
        max-width: 100%;
    }
    .page-home {
        display: flex;
        flex-direction: column;
    }
    #part_center, #part_right {
        width: 100% !important;
    }
    #banner {
        max-width: 100%;
        width: 100% !important;
    }
    #sliderFrame, #slider {
        max-width: 100%;
        width: 100% !important;
    }
    #slider img, #slider a img {
        max-width: 100%;
        width: 100% !important;
        height: auto !important;
    }
    #tintuc_sukien {
        width: 100%;
        max-width: 100%;
    }
    .tab_content_tintuc {
        width: 100%;
    }
    #short_content {
        max-width: 100%;
    }
    .youtube-panel, .youtube-wrap, .youtube-wrap iframe {
        max-width: 100%;
        width: 100% !important;
    }
    #bt_xongvaogiangho {
        max-width: 100%;
        width: 100%;
    }
    #napthe_dangky {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
    }
    #napthe, #dangky {
        flex: 1;
        min-width: 120px;
    }
    /* Ranking page */
    #header_news {
        width: 100% !important;
        max-width: 100%;
    }
    #chitiet_tintuc {
        width: 100% !important;
        max-width: 100%;
        height: auto !important;
        min-height: 200px;
        overflow: visible !important;
    }
    #detail_content {
        width: 100% !important;
        max-width: 100%;
        padding-left: 10px;
        padding-right: 10px;
    }
    #title_detail_tintuc {
        width: 100% !important;
        max-width: 100%;
        font-size: 20px;
    }
    #ngancach_title_and_content {
        width: 90%;
        max-width: 100%;
    }
    .ranking-page .resizeObj {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: 0 -10px;
        padding: 0 10px;
    }
    .table-ranking-full {
        min-width: 600px;
        font-size: 12px;
    }
    .table-ranking-full td {
        padding: 0.4rem 0.3rem !important;
    }
}

/* Mobile */
@media (max-width: 768px) {
    #main {
        padding-left: 5px;
        padding-right: 5px;
        padding-top: 0;
        padding-bottom: 60px;
    }
    #noidung {
        padding-top: 180px;
    }
    .guide-karma-row {
        flex-direction: column;
    }
    .guide-karma-row .home-quick-boxes {
        width: 100%;
        max-width: 100%;
    }
    .guide-karma-row .home-quick-boxes .home-quick-box {
        width: 100% !important;
    }
    .guide-karma-row #karma-below-news {
        flex-direction: column;
    }
    .guide-karma-row .karma-below-item {
        flex: 1 1 100%;
        min-width: 0;
    }
    header .container {
        flex-wrap: wrap;
    }
    header .nav nav {
        width: 100%;
        margin: 0 !important;
    }
    header .nav nav ul {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
        padding: 0;
        margin: 0;
        list-style: none;
    }
    header .nav nav ul li {
        float: none !important;
        margin: 0;
        text-align: center;
    }
    header .nav nav ul li a {
        display: block;
        padding: 10px 6px !important;
        font-size: 12px !important;
        line-height: 1.3 !important;
    }
    header .nav nav ul.home-main-menu li .home-header-btn {
        min-width: 0;
        width: 100%;
        height: 60px;
        border-radius: 10px;
    }
    header .nav nav ul li a i {
        display: block;
        margin-bottom: 4px;
        font-size: 18px !important;
    }
    .logo img, .logodes {
        max-width: 120px;
        height: auto;
    }
    #sliderFrame, #slider {
        height: auto !important;
        min-height: 120px;
    }
    #slider img {
        width: 100% !important;
        height: auto !important;
    }
    #tintuc_sukien {
        height: auto;
        min-height: 140px;
    }
    .tab_content_tintuc {
        height: auto;
    }
    #part_right {
        width: 100% !important;
    }
    #part_right .youtube-panel,
    #part_right .youtube-wrap {
        width: 100% !important;
    }
    .fixzone {
        max-width: 90vw;
        touch-action: manipulation;
    }
    /* Ranking page mobile */
    .table-ranking-full {
        min-width: 500px;
        font-size: 11px;
    }
    .table-ranking-full thead tr {
        font-size: 11px !important;
    }
    .table-ranking-full td {
        padding: 0.35rem 0.25rem !important;
    }
    .rank-cell {
        min-width: 32px;
    }
}

/* Small mobile - menu vẫn 3 cột */
@media (max-width: 480px) {
    #noidung {
        padding-top: 160px;
    }
    header .nav nav ul li a {
        padding: 8px 4px !important;
        font-size: 11px !important;
    }
    header .nav nav ul li a i {
        font-size: 16px !important;
    }
    #bt_xongvaogiangho {
        height: 120px;
    }
    #napthe, #dangky {
        width: 100%;
        min-width: 0;
    }
    #napthe_dangky {
        flex-direction: column;
    }
    #ngancach {
        display: none;
    }
    .guide-karma-row .karma-below-title {
        font-size: 14px;
    }
    .guide-karma-row .karma-below-table td {
        font-size: 10px;
        padding: 0.2rem;
    }
    /* Ranking page small mobile */
    .table-ranking-full {
        min-width: 450px;
        font-size: 10px;
    }
    .table-ranking-full thead tr {
        font-size: 10px !important;
    }
}

/* Fullscreen / standalone (PWA) */
@media (display-mode: fullscreen), (display-mode: standalone) {
    html, body {
        min-height: 100vh;
        min-height: -webkit-fill-available;
    }
    #main {
        min-height: 100vh;
    }
}