/*! © 2026 Trương Nguyễn Hoàng Hưng — Luyện Tin học. All Rights Reserved. Không sao chép khi chưa được phép. */@import url(https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@500;600;700;800;900&display=swap);:root{--phong:"Be Vietnam Pro","Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;--nen:#F4F6FD;--nen2:#FFF8EC;--the:#FFFFFF;--vien:#E4E8F4;--muc:#1E2447;--mo:#6A7294;--chinh:#5468FF;--chinh-dam:#3B4BD8;--chinh-nhat:#EEF0FF;--vang:#FFB620;--cam:#FF7A59;--xanh:#3D7BFF;--dung:#1FB37A;--sai:#EF4F6A;--tim:#7C5CFF;--tamduoc:#E8960C;--bong:0 1px 0 rgba(30,36,71,.04),0 8px 24px rgba(30,36,71,.07);--bong-noi:0 2px 0 rgba(30,36,71,.05),0 14px 32px rgba(30,36,71,.12);--bo:20px;--nen-toi:#131833;--nen-toi2:#1C2350;--m-go:#3D7BFF;--m-gotv:#FF7A59;--m-chuot:#1FB37A;--m-ic3:#7C5CFF;--m-cdso:#F5A300;--m-word:#2B579A;--m-pp:#C43E1C;--m-thuattoan:#0EA5A5;--m-excel:#217346;--m-ai:#8B5CF6}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{min-height:100vh;color:var(--muc);background-color:var(--nen);background-image:radial-gradient(rgba(84,104,255,.07) 1.2px,transparent 1.2px),linear-gradient(180deg,#f7f8ff 0,#f1f5fd 60%,#eef7f6 100%);background-size:22px 22px,100% 100%;background-attachment:fixed;font-family:var(--phong);font-size:15.5px;line-height:1.5;touch-action:manipulation;-webkit-font-smoothing:antialiased}button,input,select,textarea{font-family:inherit}a{color:var(--chinh)}nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding:8px 18px;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);border-bottom:1px solid var(--vien);box-shadow:0 2px 14px 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main>p.phu-de{color:#c7d2fe}html:not(.rieng) body>footer{color:#a5b4fc!important}html:not(.rieng) main h1,html:not(.rieng) main h2{color:#fff;text-shadow:0 0 22px rgba(124,58,237,.4)}html:not(.rieng) .the h1,html:not(.rieng) .the h2,html:not(.rieng) .the h3{color:var(--muc);text-shadow:none}html:not(.rieng) .nhan-tren-nen{color:#e0e7ff!important}html:not(.rieng) .the{box-shadow:0 0 0 1px rgba(165,180,252,.18),0 12px 34px rgba(0,0,0,.35)}html:not(.rieng) .troi{position:fixed;inset:0;z-index:-1;pointer-events:none;overflow:hidden}html:not(.rieng) .troi i{position:absolute;top:0;left:var(--x);font-style:normal;font-size:var(--c);opacity:.5;filter:saturate(.9) drop-shadow(0 0 6px rgba(165,180,252,.7));transform:translateY(110vh);animation:troiLen var(--d) linear infinite;animation-delay:var(--tre)}html:not(.rieng) .troi b{position:absolute;left:var(--x);top:var(--y);width:var(--c);height:var(--c);border-radius:50%;background:radial-gradient(circle,#fff 0,#e0e7ff 40%,transparent 70%);opacity:0;animation:lapLanh var(--d) ease-in-out infinite;animation-delay:var(--tre)}@keyframes troiLen{0%{transform:translateY(110vh) translateX(0) rotate(0)}50%{transform:translateY(45vh) translateX(var(--l)) rotate(180deg)}100%{transform:translateY(-15vh) translateX(0) rotate(360deg)}}@keyframes lapLanh{0%,100%{opacity:0;transform:scale(.6)}50%{opacity:.9;transform:scale(1.2)}}@media (prefers-reduced-motion:reduce){html:not(.rieng) .troi i{animation:troiCham calc(var(--d)*2.2) linear infinite!important;animation-delay:calc(var(--tre)*2.2)!important}html:not(.rieng) .troi b{animation:none;opacity:.5}@keyframes troiCham{0%{transform:translateY(110vh)}100%{transform:translateY(-15vh)}}}html:not(.rieng) body{--the:rgba(14,18,52,.72);--nen:rgba(14,18,52,.55);--nen2:rgba(255,182,32,.14);--muc:#EEF2FF;--mo:#B8C2E6;--vien:rgba(165,180,252,.24);--chinh-nhat:rgba(124,92,255,.24);--dung:#34D399;--sai:#FB7185;--tamduoc:#FBBF24;--bong:0 0 0 1px rgba(165,180,252,.16),0 10px 28px rgba(0,0,0,.35);--bong-noi:0 0 0 1px rgba(165,180,252,.3),0 16px 36px rgba(0,0,0,.45);color:var(--muc)}html:not(.rieng) #khu-bai,html:not(.rieng) #khung,html:not(.rieng) #mat,html:not(.rieng) #noi-dung-tin,html:not(.rieng) #nut-am,html:not(.rieng) #nut-ds,html:not(.rieng) #nut-thoat-goc,html:not(.rieng) #phu-de-cap,html:not(.rieng) #tab-anh,html:not(.rieng) #tab-van,html:not(.rieng) #xem-cau,html:not(.rieng) .bai-card,html:not(.rieng) .cap-card,html:not(.rieng) .ct,html:not(.rieng) .hop-mo-ta,html:not(.rieng) .ket-qua-hop,html:not(.rieng) .khay,html:not(.rieng) .lua-chon,html:not(.rieng) .nut-cho,html:not(.rieng) .nut.trang,html:not(.rieng) .o-bai,html:not(.rieng) .o-so,html:not(.rieng) .pa button,html:not(.rieng) .tab-nut,html:not(.rieng) .the,html:not(.rieng) .the-cl,html:not(.rieng) .the-hh,html:not(.rieng) .the-pm,html:not(.rieng) .the-thanh-tuu,html:not(.rieng) .tx-muc,html:not(.rieng) .tx-nhom,html:not(.rieng) .viec,html:not(.rieng) .yeu-cau,html:not(.rieng) select,html:not(.rieng) textarea{background:var(--the)!important;color:var(--muc);border-color:var(--vien)}html:not(.rieng) .viec.dang{background:rgba(124,92,255,.3)!important;border-color:#a78bfa}html:not(.rieng) .cap-card.dang{background:var(--chinh)!important}html:not(.rieng) .pa button.dung{background:rgba(52,211,153,.28)!important;border-color:var(--dung)}html:not(.rieng) .pa button.sai{background:rgba(251,113,133,.25)!important;border-color:var(--sai)}html:not(.rieng) .pa button:hover{background:rgba(124,92,255,.3)!important}html:not(.rieng) .thanh-td-nho,html:not(.rieng) .thanh-tien-do{background:rgba(255,255,255,.12)!important}html:not(.rieng) .nut.trang{box-shadow:0 4px 0 rgba(0,0,0,.35)}html:not(.rieng) #nut-thoat-goc{color:#fecaca!important}html:not(.rieng) .nut-cho span{color:#bbf7d0!important}html:not(.rieng) input{color:#1e2447}html:not(.rieng) input::placeholder{color:#8a93b5}html:not(.rieng) optgroup,html:not(.rieng) option{background:#fff;color:#1e2447}html:not(.rieng) 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.luoi-o{--the:#FFFFFF;--nen:#F4F6FD;--nen2:#FFF8EC;--muc:#1E2447;--mo:#6A7294;--vien:#E4E8F4;--chinh-nhat:#EEF0FF;--dung:#1FB37A;--sai:#EF4F6A;--tamduoc:#E8960C;--bong:0 1px 0 rgba(30,36,71,.04),0 8px 24px rgba(30,36,71,.07);--bong-noi:0 2px 0 rgba(30,36,71,.05),0 14px 32px rgba(30,36,71,.12);color:var(--muc)}html:not(.rieng) #ban-phim-wrap .nut.trang,html:not(.rieng) #ban-phim-wrap .pa button,html:not(.rieng) #ban-phim-wrap .the,html:not(.rieng) #ban-phim-wrap select,html:not(.rieng) #ban-phim-wrap textarea,html:not(.rieng) #cua-so .nut.trang,html:not(.rieng) #cua-so .pa button,html:not(.rieng) #cua-so .the,html:not(.rieng) #cua-so select,html:not(.rieng) #cua-so textarea,html:not(.rieng) #cua-so-pp .nut.trang,html:not(.rieng) #cua-so-pp .pa button,html:not(.rieng) #cua-so-pp .the,html:not(.rieng) #cua-so-pp select,html:not(.rieng) #cua-so-pp textarea,html:not(.rieng) #cua-so-word .nut.trang,html:not(.rieng) #cua-so-word .pa button,html:not(.rieng) #cua-so-word .the,html:not(.rieng) #cua-so-word select,html:not(.rieng) #cua-so-word textarea,html:not(.rieng) #giay-bo .nut.trang,html:not(.rieng) #giay-bo .pa button,html:not(.rieng) #giay-bo .the,html:not(.rieng) #giay-bo select,html:not(.rieng) #giay-bo textarea,html:not(.rieng) #khu-chieu .nut.trang,html:not(.rieng) #khu-chieu .pa button,html:not(.rieng) #khu-chieu .the,html:not(.rieng) #khu-chieu select,html:not(.rieng) #khu-chieu textarea,html:not(.rieng) #khu-lam .nut.trang,html:not(.rieng) #khu-lam .pa button,html:not(.rieng) #khu-lam .the,html:not(.rieng) #khu-lam select,html:not(.rieng) #khu-lam textarea,html:not(.rieng) #khung-ve .nut.trang,html:not(.rieng) #khung-ve .pa button,html:not(.rieng) #khung-ve .the,html:not(.rieng) #khung-ve select,html:not(.rieng) #khung-ve textarea,html:not(.rieng) #luoi .nut.trang,html:not(.rieng) #luoi .pa button,html:not(.rieng) #luoi .the,html:not(.rieng) #luoi select,html:not(.rieng) #luoi textarea,html:not(.rieng) #man-hinh-may .nut.trang,html:not(.rieng) #man-hinh-may .pa 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select,html:not(.rieng) #lop-obj textarea,html:not(.rieng) #menu-obj-ph .nut.trang,html:not(.rieng) #menu-obj-ph .the,html:not(.rieng) #menu-obj-ph select,html:not(.rieng) #menu-obj-ph textarea,html:not(.rieng) #o-tim .nut.trang,html:not(.rieng) #o-tim .the,html:not(.rieng) #o-tim select,html:not(.rieng) #o-tim textarea,html:not(.rieng) #tcc .nut.trang,html:not(.rieng) #tcc .the,html:not(.rieng) #tcc select,html:not(.rieng) #tcc textarea,html:not(.rieng) .menu-nho .nut.trang,html:not(.rieng) .menu-nho .the,html:not(.rieng) .menu-nho select,html:not(.rieng) .menu-nho textarea{background:#fff!important}html:not(.rieng) .pa{background:var(--the)!important;color:var(--muc);border-color:var(--vien)}html:not(.rieng) .pa:hover{background:rgba(124,92,255,.3)!important}html:not(.rieng) .pa.chon{background:rgba(124,92,255,.32)!important;border-color:#a78bfa}html:not(.rieng) .pa.dung{background:rgba(52,211,153,.24)!important;border-color:var(--dung)}html:not(.rieng) .pa.sai{background:rgba(251,113,133,.22)!important;border-color:var(--sai)}html:not(.rieng) #o-gt{background:rgba(52,211,153,.16)!important;--muc:#EEF2FF;color:#eef2ff;border:1px solid rgba(52,211,153,.4)}html:not(.rieng) #cua-so #o-gt,html:not(.rieng) #cua-so-pp #o-gt,html:not(.rieng) #cua-so-word #o-gt,html:not(.rieng) #khu-lam #o-gt,html:not(.rieng) #man-hinh-may #o-gt{background:#eaf9f0!important;--muc:#1E2447;color:#1e2447;border:2px solid #1fb37a}html:not(.rieng) .phim-chip{background:rgba(251,113,133,.2)!important;color:#fecdd3}.nut-cai-app[hidden]{display:none!important}