/* Dựng bổ sung: thay maxmegamenu/style.css, fl-icons và lightbox không có trong Wayback. */
.mega-menu-toggle{display:none}
ul.mega-menu,ul.mega-sub-menu{list-style:none;margin:0;padding:0}
ul.mega-menu li{list-style:none;margin:0}
#mega-menu-primary{display:flex;flex-wrap:wrap;justify-content:flex-end;align-items:center}
#mega-menu-primary>li{position:relative}
#mega-menu-primary>li>a{display:block;padding:8px 10px;color:#f37032;font-family:Roboto,sans-serif;font-weight:700;font-size:14px;text-transform:uppercase;white-space:nowrap}
#mega-menu-primary>li>a:hover{color:#f03c3c}
#mega-menu-primary .mega-sub-menu{display:none;position:absolute;top:100%;left:0;z-index:999;min-width:200px;padding:8px 0;background:#fff;border:2px solid #f37032;border-radius:15px;box-shadow:1px 1px 15px rgba(0,0,0,.15)}
#mega-menu-primary>li:hover>.mega-sub-menu,#mega-menu-primary>li:focus-within>.mega-sub-menu{display:block}
#mega-menu-primary>li:nth-last-child(-n+4) .mega-sub-menu{left:auto;right:0}
#mega-menu-primary .mega-sub-menu a{display:block;padding:8px 18px;color:#333;font-size:14px;white-space:nowrap}
#mega-menu-primary .mega-sub-menu a:hover{color:#f37032}
.mega-indicator:after{content:"";display:inline-block;width:.42em;height:.42em;margin:0 0 .16em .4em;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg)}
#mega-menu-primary .mega-sub-menu .mega-indicator{display:none}
i.icon-menu,i.icon-search,i.icon-angle-up{display:inline-block;width:1.2em;height:1.2em;vertical-align:middle;background:currentColor;-webkit-mask:var(--ic) center/contain no-repeat;mask:var(--ic) center/contain no-repeat}
i.icon-menu:before,i.icon-search:before,i.icon-angle-up:before{content:none}
i.icon-menu{--ic:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M3 6h18v2H3zm0 5h18v2H3zm0 5h18v2H3z'/%3E%3C/svg%3E")}
i.icon-search{--ic:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M10 3a7 7 0 1 0 4.2 12.6l5.1 5.1 1.4-1.4-5.1-5.1A7 7 0 0 0 10 3zm0 2a5 5 0 1 1 0 10 5 5 0 0 1 0-10z'/%3E%3C/svg%3E")}
i.icon-angle-up{--ic:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 15l6-6 6 6-1.4 1.4L12 11.8l-4.6 4.6z'/%3E%3C/svg%3E")}
#main-menu.preview-open{display:block!important;position:fixed;top:0;left:0;bottom:0;z-index:100000;width:300px;max-width:85vw;overflow-y:auto;background:#fff;box-shadow:2px 0 18px rgba(0,0,0,.3)}
#preview-overlay{display:none;position:fixed;inset:0;z-index:99999;background:rgba(0,0,0,.55)}
#preview-overlay.on{display:block}
#main-menu ul.mega-menu{display:block}
#main-menu ul.mega-menu>li{border-top:1px solid #eee}
#main-menu ul.mega-menu a{display:block;padding:12px 18px;color:#f37032;font-weight:700;text-transform:uppercase;font-size:14px}
#main-menu .mega-sub-menu{display:none;background:#fafafa}
#main-menu .mega-sub-menu a{padding-left:32px;color:#333;font-weight:400;text-transform:none}
#main-menu li.preview-sub-open>.mega-sub-menu{display:block}
#main-menu .mega-indicator{float:right;padding:0 8px}
.preview-note{padding:10px 14px;margin:12px 0;border:1px solid #f37032;border-radius:6px;color:#333}
#masthead .header-nav-main{margin:0!important}#masthead .flex-right{display:flex;align-items:center}
#mega-menu-wrap-primary{display:flex;align-items:center}
#main-menu ul.mega-menu .mega-sub-menu a{padding-left:32px;color:#333;font-weight:400;text-transform:none}

/* Kết quả tìm kiếm: cùng kiểu lưới với thẻ sách ở trang lớp */
.sgk-results{padding:40px 15px 60px;max-width:1110px;margin:0 auto}
.sgk-results-title{font-size:26px;color:#020202}
.sgk-results-pages a{display:inline-block;margin:0 10px 10px 0;padding:6px 12px;border:1px solid #f37032;border-radius:6px;color:#f37032}
.sgk-list{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;gap:50px;margin:30px 0 20px}
.sgk-card img{display:block;width:100%}
.sgk-card .sgk-t{display:block;text-align:center;padding:10px 0 4px;color:inherit}
.sgk-card .sgk-m{display:block;text-align:center;font-size:14px;color:#777}
.sgk-nocover{display:flex;align-items:center;justify-content:center;aspect-ratio:600/830;background:#f1f1f1;border:2px solid #ddd;color:#777;text-align:center;padding:10px}
@media(max-width:849px){.sgk-list{grid-template-columns:1fr 1fr;gap:24px}}
/* Máy tính: hiện icon + dropdown tìm kiếm có sẵn của header (bản gốc chỉ hiện trên điện thoại) */
@media(min-width:850px){.header-main .header-inner{position:relative}.header-main .header-inner>.flex-col.show-for-medium.flex-right{display:flex!important;position:absolute;right:15px;top:0;bottom:0;align-items:center;margin:0}}
.searchform .preview-note{display:none}
.header-search.sgk-open>.nav-dropdown,.header-search:focus-within>.nav-dropdown{visibility:visible!important;opacity:1!important;display:block!important;max-height:none!important;pointer-events:auto!important;left:auto!important;right:0!important;transform:none!important;z-index:1000}