:root{--orange:#f37021;--orange-dark:#eb5714;--blue:#0066b3;--ink:#151515;--text:#3d3d3d;--muted:#747474;--cream:#fdfaf5;--peach:#fee8d2;--line:#e9e9e9;--soft:#f6f7f9;--green:#18a043;--purple:#7257d8;--shadow:0 14px 40px rgba(26,26,26,.08);--radius:20px;--shell:min(1180px,calc(100% - 40px))}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Be Vietnam Pro",sans-serif;color:var(--ink);background:#fff}button,input{font:inherit}button{cursor:pointer}.shell{width:var(--shell);margin-inline:auto}.topbar{background:#151515;color:#fff;font-size:12px}.topbar-inner{height:34px;display:flex;align-items:center;justify-content:space-between}.topbar-links{display:flex;gap:24px;color:#d8d8d8}.site-header{position:relative;z-index:30;background:#fff;border-bottom:1px solid #eee}.nav-row{height:78px;display:flex;align-items:center;gap:36px}.brand{display:inline-flex;align-items:center;gap:10px;border:0;background:transparent;padding:0;text-align:left}.brand-mark{display:flex;gap:3px;transform:skew(-13deg)}.brand-mark i{display:block;width:10px;height:30px;border-radius:2px}.brand-mark i:nth-child(1){background:#f37021}.brand-mark i:nth-child(2){background:#18a043}.brand-mark i:nth-child(3){background:#0066b3}.brand-copy{display:grid;line-height:1}.brand-copy b{font-size:24px;letter-spacing:1px}.brand-copy small{margin-top:5px;font-size:9px;letter-spacing:.9px;color:#555}.desktop-nav{display:flex;align-items:center;gap:4px;margin-left:auto}.desktop-nav button,.mobile-nav button{border:0;background:transparent;padding:12px 13px;font-weight:600;color:#444}.desktop-nav button.active,.desktop-nav button:hover{color:var(--orange)}.nav-actions{display:flex;gap:9px;align-items:center}.icon-btn,.menu-btn{width:40px;height:40px;border:1px solid #e5e5e5;border-radius:50%;background:#fff}.menu-btn{display:none}.pill{border:0;border-radius:999px;padding:11px 18px;font-weight:700;transition:.2s}.pill.primary{background:var(--orange);color:white}.pill.primary:hover{background:var(--orange-dark);transform:translateY(-1px)}.pill.outline{background:#fff;border:1px solid #ddd}.pill.white{background:#fff;color:#222}.pill.danger{background:#e94e4e;color:#fff}.pill.lg{padding:14px 22px}.pill.full{width:100%}.mobile-nav{display:none}.page{display:none}.page.active{display:block}.hero-wrap{position:relative;overflow:hidden;background:linear-gradient(115deg,#fff8f1,#fff 54%,#f3f8fc);min-height:640px}.hero-bg{position:absolute;border-radius:50%;filter:blur(1px)}.hero-bg-a{width:430px;height:430px;right:-120px;top:-180px;background:rgba(243,112,33,.09)}.hero-bg-b{width:330px;height:330px;left:-190px;bottom:-190px;background:rgba(0,102,179,.06)}.hero{min-height:640px;display:grid;grid-template-columns:1.08fr .92fr;align-items:center;gap:60px}.eyebrow{font-size:12px;font-weight:800;letter-spacing:1.5px}.eyebrow.orange{color:var(--orange)}.eyebrow.light{color:#ffe5d3}.hero h1{font-size:52px;line-height:1.08;margin:15px 0 18px;letter-spacing:-1.8px}.hero h1 span{color:var(--orange)}.hero p{max-width:610px;color:#5b5b5b;line-height:1.8;font-size:16px}.hero-actions{display:flex;gap:12px;margin:28px 0}.hero-stats{display:flex;gap:38px;margin-top:38px}.hero-stats div{display:grid}.hero-stats b{font-size:24px}.hero-stats span{color:#777;font-size:12px;margin-top:4px}.hero-art{position:relative;min-height:480px;display:grid;place-items:center}.orange-orbit{position:absolute;width:390px;height:390px;border-radius:50%;background:linear-gradient(145deg,#f37021,#ff9d5f);box-shadow:0 30px 60px rgba(243,112,33,.25)}.book-card{width:245px;min-height:330px;background:#fff;z-index:1;border-radius:8px 20px 20px 8px;box-shadow:0 25px 55px rgba(0,0,0,.16);overflow:hidden;transform:rotate(-5deg)}.book-top{padding:20px;background:#0d5892;color:#fff;font-weight:700;font-size:13px}.book-body{padding:46px 25px 25px;display:grid;gap:12px;background:linear-gradient(165deg,#fff,#f4f8fb)}.book-body span{color:var(--orange);font-weight:800;font-size:13px}.book-body b{font-size:27px;line-height:1.25}.book-body small{margin-top:24px;color:#666}.floating-card{position:absolute;z-index:3;background:#fff;border-radius:16px;padding:12px 14px;display:flex;gap:10px;align-items:center;box-shadow:var(--shadow)}.floating-card>span{display:grid;place-items:center;width:35px;height:35px;border-radius:50%;background:#fff0e7;color:var(--orange);font-weight:900}.floating-card div{display:grid;gap:3px}.floating-card b{font-size:12px}.floating-card small{font-size:10px;color:#777}.fc-one{left:5px;bottom:88px}.fc-two{right:-10px;top:80px}.section-space{padding:85px 0}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:34px}.section-heading h2{font-size:34px;margin:8px 0 0}.text-link{border:0;background:none;color:var(--orange);font-weight:700}.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.topic-card{padding:26px;border:1px solid #eee;border-radius:var(--radius);transition:.25s;background:#fff}.topic-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#f5d3be}.topic-icon{width:54px;height:54px;border-radius:16px;display:grid;place-items:center;font-weight:800;font-size:19px;margin-bottom:20px}.warm{background:#fff0e7;color:var(--orange)}.blue{background:#eaf5fd;color:var(--blue)}.green{background:#eaf8ef;color:var(--green)}.purple{background:#f1edff;color:var(--purple)}.tag{display:inline-block;background:#fff0e7;color:var(--orange);border-radius:999px;padding:5px 9px;font-size:10px;font-weight:800}.blue-tag{background:#eaf5fd;color:var(--blue)}.green-tag{background:#eaf8ef;color:var(--green)}.purple-tag{background:#f1edff;color:var(--purple)}.topic-card h3{font-size:18px;margin:14px 0 10px}.topic-card p{font-size:13px;color:#6d6d6d;line-height:1.7;min-height:66px}.topic-foot{padding-top:17px;border-top:1px solid #eee;display:flex;justify-content:space-between;color:#777;font-size:12px}.topic-foot b{color:var(--orange)}.exam-band{background:#0d5d99;color:#fff;overflow:hidden}.exam-band-inner{min-height:370px;display:grid;grid-template-columns:1.2fr .8fr;align-items:center;position:relative}.exam-band h2{font-size:38px;max-width:700px;margin:12px 0}.exam-band p{color:#dcebf6;line-height:1.7;max-width:680px}.score-ring{display:grid;place-items:center}.score-ring>div{width:215px;height:215px;border-radius:50%;border:22px solid rgba(255,255,255,.13);outline:8px solid rgba(255,255,255,.05);display:grid;place-items:center;align-content:center;background:#fff;color:#111;box-shadow:0 18px 60px rgba(0,0,0,.18)}.score-ring b{font-size:58px;color:var(--orange);line-height:1}.score-ring span{font-weight:700;color:#777}.score-ring small{margin-top:8px;color:#777}.inner-page{padding:62px 0 90px;min-height:700px}.page-title{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}.page-title h1{font-size:40px;margin:8px 0}.page-title p{color:#777}.search-box{border:1px solid #ddd;border-radius:999px;padding:12px 16px;display:flex;gap:8px;min-width:300px}.search-box input{border:0;outline:0;width:100%}.filter-row{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:30px}.filter{border:1px solid #ddd;background:#fff;border-radius:999px;padding:9px 14px;font-weight:600;font-size:12px}.filter.active{background:var(--ink);color:#fff;border-color:var(--ink)}.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.course-card{border:1px solid #e9e9e9;border-radius:20px;overflow:hidden;background:#fff;transition:.2s}.course-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}.course-cover{height:210px;padding:28px;color:#fff;display:flex;flex-direction:column;justify-content:flex-end}.cover-1{background:linear-gradient(145deg,#0a68ab,#063f6c)}.cover-2{background:linear-gradient(145deg,#f59a5f,#e86212)}.cover-3{background:linear-gradient(145deg,#2cad67,#13763f)}.course-cover span{font-size:11px;letter-spacing:1.2px;font-weight:700}.course-cover b{font-size:29px;line-height:1.15;margin-top:9px}.course-body{padding:22px}.course-body h3{font-size:17px;line-height:1.5}.course-body p{font-size:12px;color:#777}.progress{height:7px;background:#eee;border-radius:999px;overflow:hidden}.progress i{display:block;height:100%;background:var(--orange);border-radius:999px}.course-foot{display:flex;justify-content:space-between;align-items:center;margin-top:10px}.course-foot small{color:#777;font-size:11px}.course-foot button{border:0;background:none;color:var(--orange);font-weight:700}.breadcrumbs{font-size:12px;color:#888;margin-bottom:26px}.lesson-layout{display:grid;grid-template-columns:300px 1fr;gap:36px}.lesson-sidebar{border:1px solid #e8e8e8;border-radius:18px;padding:22px;align-self:start;position:sticky;top:20px}.lesson-sidebar h3{margin:8px 0 20px}.mini-progress span{font-size:11px;color:#777}.mini-progress .progress{margin-top:8px}.lesson-list{display:grid;margin:22px -10px -10px}.lesson-list button{border:0;background:none;text-align:left;padding:12px 10px;display:flex;gap:10px;border-radius:12px}.lesson-list i{width:29px;height:29px;border-radius:50%;background:#eee;display:grid;place-items:center;font-style:normal;font-size:10px;flex:0 0 auto}.lesson-list span{display:grid;gap:4px;font-size:12px}.lesson-list small{color:#999;font-size:9px}.lesson-list .done i{background:#e9f7ee;color:var(--green)}.lesson-list .current{background:#fff3ea;color:var(--orange)}.lesson-list .current i{background:var(--orange);color:#fff}.lesson-head h1{font-size:35px;max-width:760px}.video-shell{aspect-ratio:16/9;background:#111;border-radius:18px;overflow:hidden}.video-placeholder{height:100%;display:grid;place-items:center;align-content:center;color:white;background:radial-gradient(circle at 60% 20%,#444,#111 58%);gap:12px}.video-placeholder button{width:70px;height:70px;border:0;border-radius:50%;font-size:24px;color:#fff;background:var(--orange)}.video-placeholder small{color:#bbb}.lesson-tabs{display:flex;gap:25px;border-bottom:1px solid #ddd;margin-top:26px}.lesson-tabs button{padding:15px 0;border:0;border-bottom:3px solid transparent;background:none;font-weight:700}.lesson-tabs .active{color:var(--orange);border-color:var(--orange)}.lesson-content{padding:20px 0}.lesson-content p{color:#555;line-height:1.8}.note{background:#fff5ed;border-left:4px solid var(--orange);padding:18px 20px;margin:22px 0;border-radius:0 12px 12px 0}.note p{margin-bottom:0}.exam-page{background:#f5f6f8;min-height:calc(100vh - 112px)}.exam-top{height:72px;background:#fff;border-bottom:1px solid #ddd;padding:0 max(25px,calc((100vw - 1180px)/2));display:flex;align-items:center;justify-content:space-between;gap:20px}.exam-top>div:first-child{display:grid;gap:3px}.brand-mini{font-weight:800;color:var(--orange)}.exam-top small{color:#777}.timer{text-align:center}.timer small{display:block;font-size:9px;text-transform:uppercase}.timer b{font-size:21px;color:#b84040}.exam-layout{display:grid;grid-template-columns:1fr 300px;gap:25px;padding-top:28px;padding-bottom:50px}.question-card,.exam-nav{background:#fff;border-radius:18px;border:1px solid #e3e3e3;padding:28px}.question-kicker{color:var(--orange);font-weight:800;font-size:11px;letter-spacing:1px}.passage{background:#f7f7f7;border-radius:14px;padding:18px 20px;margin:20px 0;line-height:1.7;font-size:13px}.question-card h2{font-size:21px;line-height:1.55}.answers{display:grid;gap:10px;margin-top:20px}.answers label{border:1px solid #ddd;border-radius:13px;padding:13px 14px;display:flex;align-items:center;gap:11px}.answers input{display:none}.answers label>span{width:32px;height:32px;border-radius:50%;border:1px solid #ccc;display:grid;place-items:center;font-weight:800}.answers .selected{border-color:var(--orange);background:#fff8f3}.answers .selected>span{background:var(--orange);color:#fff;border-color:var(--orange)}.question-actions{display:flex;justify-content:space-between;margin-top:30px}.exam-nav{align-self:start}.legend{display:flex;gap:12px;font-size:10px;color:#777}.dot{width:8px;height:8px;border-radius:50%;display:inline-block;margin-right:4px}.dot.done{background:var(--blue)}.dot.current{background:var(--orange)}.q-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin:20px 0}.q-grid button{aspect-ratio:1;border:1px solid #ddd;border-radius:8px;background:#fff;font-size:11px}.q-grid button.done{background:#eaf5fd;color:var(--blue);border-color:#bcdcf3}.q-grid button.current{background:var(--orange);color:#fff;border-color:var(--orange)}.autosave{font-size:10px;color:var(--green);padding-top:16px;border-top:1px solid #eee}.result-hero{background:linear-gradient(110deg,#fff7f0,#fff);border-radius:24px;padding:35px;display:flex;gap:36px;align-items:center}.result-score{width:150px;height:150px;position:relative}.result-score svg{width:100%;height:100%;transform:rotate(-90deg)}.result-score circle{fill:none;stroke:#eee;stroke-width:9}.result-score .value{stroke:var(--orange);stroke-dasharray:314;stroke-dashoffset:56;stroke-linecap:round}.result-score>div{position:absolute;inset:0;display:grid;place-items:center;align-content:center}.result-score b{font-size:38px}.result-score span{color:#777}.result-hero h1{font-size:36px;margin:7px 0}.result-hero p{color:#777}.result-chips{display:flex;flex-wrap:wrap;gap:8px}.result-chips span{padding:7px 10px;background:#fff;border:1px solid #eee;border-radius:999px;font-size:10px}.result-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin:22px 0}.result-grid article{border:1px solid #eee;border-radius:16px;padding:20px;display:grid;gap:8px}.result-grid span,.result-grid small{color:#777;font-size:11px}.result-grid b{font-size:24px}.analysis-card{border:1px solid #eee;border-radius:20px;padding:26px}.skill-row{display:grid;grid-template-columns:130px 1fr 60px;gap:14px;align-items:center;margin:18px 0;font-size:12px}.skill-row b{text-align:right}.login-page{min-height:calc(100vh - 112px);display:none;grid-template-columns:1.05fr .95fr}.login-page.active{display:grid}.login-art{background:linear-gradient(145deg,rgba(0,70,120,.96),rgba(0,102,179,.84)),radial-gradient(circle at 70% 20%,#f37021,#0066b3);display:grid;align-items:end;padding:70px;min-height:690px}.login-art-copy{color:#fff}.login-art-copy h1{font-size:45px;line-height:1.18}.login-art-copy p{color:#d9ebf6}.login-panel{display:grid;place-items:center;padding:50px}.login-box{width:min(430px,100%)}.login-brand{margin-bottom:45px}.login-box h2{font-size:30px;margin-bottom:8px}.login-box>p{color:#777;margin-bottom:30px}.login-box>label{display:grid;gap:8px;font-size:12px;font-weight:700;margin:16px 0}.login-box input{height:48px;border:1px solid #ddd;border-radius:12px;padding:0 14px;outline:0}.password{position:relative}.password input{width:100%}.password span{position:absolute;right:14px;top:13px;color:#999}.login-meta{display:flex;justify-content:space-between;align-items:center;font-size:11px;margin:15px 0 22px}.login-meta label{display:flex;align-items:center;gap:6px}.login-meta input{width:14px;height:14px}.login-meta a{color:var(--orange)}.help{display:block;text-align:center;color:#888;margin-top:22px}.dashboard-page{display:none;grid-template-columns:240px 1fr;min-height:calc(100vh - 112px);background:#f5f6f8}.dashboard-page.active{display:grid}.dash-side{background:#14202b;color:#fff;padding:24px 17px;display:flex;flex-direction:column}.dash-brand{padding:8px}.dash-brand .brand-copy small{color:#aeb8c0}.dash-side nav{display:grid;gap:5px;margin-top:45px}.dash-side nav button,.back-site{border:0;background:none;color:#b9c2ca;text-align:left;padding:12px 14px;border-radius:10px}.dash-side nav .active{background:rgba(243,112,33,.18);color:#fff}.back-site{margin-top:auto}.dash-main{padding:35px}.dash-top{display:flex;justify-content:space-between;align-items:center}.dash-top small{color:#777}.dash-top h1{font-size:27px;margin:5px 0}.avatar{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:#fff0e7;color:var(--orange);font-weight:800}.dash-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin:25px 0}.dash-stats article{background:#fff;border-radius:16px;padding:20px;display:flex;gap:13px;align-items:center}.stat-icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center}.orange-bg{background:#fff0e7;color:var(--orange)}.blue-bg{background:#eaf5fd;color:var(--blue)}.green-bg{background:#eaf8ef;color:var(--green)}.purple-bg{background:#f1edff;color:var(--purple)}.dash-stats div{display:grid;gap:3px}.dash-stats small{color:#777}.dash-stats b{font-size:25px}.dash-stats em{font-style:normal;font-size:9px;color:#6a7}.dash-columns{display:grid;grid-template-columns:1.2fr .8fr;gap:15px}.panel{background:#fff;border-radius:16px;padding:22px}.panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.panel-head h3{margin:0}.panel-head button{border:0;background:none;color:var(--orange);font-size:11px}.activity{display:grid;grid-template-columns:40px 1fr auto;gap:10px;align-items:center;padding:14px 0;border-bottom:1px solid #eee}.activity i{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;font-style:normal}.activity div{display:grid;gap:4px}.activity b{font-size:12px}.activity small,.activity time{font-size:9px;color:#888}.quick-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px}.quick-grid button{border:1px solid #eee;background:#fff;border-radius:13px;min-height:105px;font-size:26px;color:var(--orange)}.quick-grid button span{display:block;font-size:11px;color:#333;margin-top:8px}.site-footer{background:#161616;color:#fff;padding:55px 0 20px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}.footer-grid>div{display:grid;align-content:start;gap:10px}.footer-grid p,.footer-grid a{font-size:11px;color:#aaa;line-height:1.7;cursor:pointer}.footer-brand .brand-copy small{color:#aaa}.footer-bottom{border-top:1px solid #333;margin-top:35px;padding-top:20px;color:#777;font-size:10px}.dashboard-page.active~.site-footer,.exam-page.active~.site-footer,.login-page.active~.site-footer{display:none}@media(max-width:980px){.desktop-nav,.nav-actions>.icon-btn{display:none}.nav-actions{margin-left:auto}.menu-btn{display:block}.mobile-nav.open{display:grid;grid-template-columns:1fr 1fr;padding:10px 20px 20px;border-top:1px solid #eee}.hero{grid-template-columns:1fr;gap:10px;padding:65px 0}.hero-art{min-height:420px}.hero h1{font-size:44px}.topic-grid{grid-template-columns:1fr 1fr}.course-grid{grid-template-columns:1fr 1fr}.lesson-layout{grid-template-columns:1fr}.lesson-sidebar{position:static}.exam-layout{grid-template-columns:1fr}.exam-nav{order:-1}.result-grid{grid-template-columns:1fr 1fr}.dash-stats{grid-template-columns:1fr 1fr}.dash-columns{grid-template-columns:1fr}.dashboard-page{grid-template-columns:190px 1fr}.footer-grid{grid-template-columns:1fr 1fr}.login-art{padding:45px}.login-art-copy h1{font-size:35px}}@media(max-width:680px){:root{--shell:min(100% - 28px,1180px)}.topbar-links{display:none}.nav-row{height:68px}.nav-actions .pill{display:none}.brand-copy b{font-size:20px}.brand-mark i{height:25px;width:8px}.hero{padding:45px 0}.hero h1{font-size:36px}.hero p{font-size:14px}.hero-actions{align-items:stretch;flex-direction:column}.hero-stats{gap:20px}.hero-art{min-height:370px;transform:scale(.9)}.orange-orbit{width:330px;height:330px}.section-space{padding:60px 0}.topic-grid,.course-grid{grid-template-columns:1fr}.section-heading{align-items:start}.section-heading h2{font-size:29px}.exam-band-inner{grid-template-columns:1fr;padding:55px 0}.score-ring{margin-top:30px}.exam-band h2{font-size:31px}.page-title{align-items:start;flex-direction:column}.page-title h1{font-size:33px}.search-box{width:100%;min-width:0}.lesson-head h1{font-size:27px}.inner-page{padding-top:35px}.exam-top{padding:10px 14px;height:auto;flex-wrap:wrap}.exam-top>div:first-child{width:50%}.exam-top .pill{padding:9px 13px}.exam-layout{width:calc(100% - 20px)}.question-card,.exam-nav{padding:18px}.result-hero{align-items:flex-start;flex-direction:column;padding:24px}.result-grid{grid-template-columns:1fr 1fr}.skill-row{grid-template-columns:90px 1fr 40px}.login-page.active{grid-template-columns:1fr}.login-art{min-height:270px;padding:35px 22px}.login-art-copy h1{font-size:31px}.login-panel{padding:45px 22px}.dashboard-page.active{display:block}.dash-side{display:none}.dash-main{padding:20px 14px}.dash-stats{grid-template-columns:1fr 1fr}.dash-stats article{padding:14px}.dash-columns{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.site-footer{padding-top:40px}}@media(max-width:440px){.topic-grid,.result-grid,.dash-stats,.footer-grid{grid-template-columns:1fr}.hero h1{font-size:32px}.hero-art{margin-inline:-30px}.hero-stats{justify-content:space-between}.q-grid{grid-template-columns:repeat(8,1fr)}.exam-nav{overflow:auto}.result-chips{display:grid}.dash-top h1{font-size:22px}}
