@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@400;500;600;700;800&family=Lexend:wght@400;500;600;700;800&display=swap');
:root{--bg:#f5fbfe;--paper:#fff;--ink:#17364d;--muted:#627d90;--accent:#05a8bf;--accent-dark:#008397;--cyan:#17c6dd;--tint:#e9faff;--line:#dcecf3;--nav:rgba(255,255,255,.96);--shadow:0 7px 24px #234c6410;--green:#087a58;--red:#be3653;--radius:24px}*{box-sizing:border-box}html{background:var(--bg);scroll-behavior:smooth}body{margin:0;color:var(--ink);font:14px/1.6 'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;background:radial-gradient(ellipse at 80% 0,#e2f6ff 0,transparent 55%),var(--bg);min-height:100vh}h1,h2,h3,.display,.word{font-family:'Lexend','Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;letter-spacing:-.04em}h1{font-size:36px;line-height:1.2;margin:12px 0}h2{font-size:24px;line-height:1.4;margin:0}h3{font-size:17px;line-height:1.4;margin:0}p{margin:8px 0}button,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer;border:0;background:none;color:inherit}button:disabled{opacity:.45;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #27a9d8;outline-offset:4px}a{color:var(--accent-dark)}svg{flex-shrink:0}.icon{width:20px;height:20px;vertical-align:middle;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.shell{max-width:1180px;margin:auto;padding:0 32px 110px}#header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:26px 0 24px;border-bottom:1px solid var(--line);margin-bottom:28px}.brand{display:flex;align-items:center;gap:12px;padding:0;text-align:left}.brand img{width:49px;height:49px}.brand strong{font-family:'Lexend','Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;font-size:23px;font-weight:700;letter-spacing:-.035em}.brand strong span{color:var(--accent)}.brand small{display:block;font-size:10px;letter-spacing:1.6px;text-transform:uppercase;color:var(--muted);margin-top:1px}.header-right{display:flex;align-items:center;gap:12px}.course-select{display:flex;align-items:center;gap:9px;background:var(--paper);border:1px solid var(--line);border-radius:13px;padding:8px 12px;font-size:12px}.course-select select{border:0;outline:0;background:none;color:var(--ink);font-weight:700;max-width:90px}.avatar{width:40px;height:40px;border-radius:50%;background:#c4f2f7;color:#007d92;font-weight:800;display:grid;place-items:center;border:3px solid white}.header-greeting{font-size:12px;color:var(--muted)}.header-greeting b{display:block;color:var(--ink)}.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 17px;border-radius:12px;font-weight:700;font-size:13px;line-height:1.5;min-height:43px;transition:transform .15s,background .15s}.btn:hover:not(:disabled){transform:translateY(-1px)}.primary{background:var(--accent-dark);color:#fff;box-shadow:0 4px 0 #006b7d}.primary:hover{background:#007589}.secondary{background:var(--paper);border:1px solid var(--line);color:var(--ink)}.soft{background:var(--tint);color:var(--accent-dark);border:1px solid #c8eaf0}.icon-btn{display:grid;place-items:center;padding:10px;border-radius:12px;border:1px solid var(--line);background:var(--paper);min-height:40px;min-width:40px}.eyebrow{display:flex;align-items:center;gap:7px;letter-spacing:1.5px;font-size:10px;font-weight:800;text-transform:uppercase;color:var(--accent-dark)}.muted{color:var(--muted)}.small{font-size:12px}.hero-grid{display:grid;grid-template-columns:1.85fr 1fr;gap:20px}.hero{background:linear-gradient(118deg,#d9f7fc 0%,#d8f5ff 60%,#b4e9fb 100%);border:1px solid #c0e9f2;padding:30px 32px;position:relative;overflow:hidden;min-height:306px;display:flex;align-items:center;box-shadow:none}.hero-content{z-index:1;position:relative;max-width:68%}.hero h1{font-size:33px;line-height:1.35}.hero h1 em{font-style:normal;color:#0094a9}.hero p{max-width:320px;font-size:12px;color:#43738a;line-height:1.8;margin-bottom:19px}.hero-dino{position:absolute;width:236px;right:-5px;bottom:-2px;pointer-events:none}.hero::before{content:'';position:absolute;width:240px;height:240px;border-radius:50%;background:#fff5;right:-20px;top:-50px}.hero-label{border:1px solid #fff9;display:inline-flex;border-radius:99px;padding:5px 10px;background:#fff8;letter-spacing:.5px}.hero .btn{font-size:12px}.plan{padding:24px;display:flex;flex-direction:column;justify-content:space-between}.panel-heading{display:flex;justify-content:space-between;align-items:center;gap:10px}.panel-heading .icon{color:var(--accent)}.plan h3{font-size:17px}.day-label{font-size:10px;color:var(--muted);white-space:nowrap}.plan-item{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}.plan-item:last-child{border:0}.plan-item .tile{width:39px;height:39px;border-radius:12px;display:grid;place-items:center;background:var(--tint);color:var(--accent-dark)}.plan-item .tile.orange{background:#fff2df;color:#b78138}.plan-item strong{display:block;font-size:12px}.plan-item small{display:block;font-size:10px;color:var(--muted)}.plan-item>b{margin-left:auto;font-family:'Lexend','Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;font-size:18px}.goal{margin-top:16px;display:flex;align-items:center;gap:10px;background:var(--bg);border-radius:12px;padding:10px 12px;font-size:10px;color:var(--muted)}.goal b{color:var(--accent-dark)}.goal .icon{color:#dda952}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:20px 0 30px}.stat{padding:17px 20px;display:flex;align-items:center;gap:12px}.stat .tile{width:40px;height:40px;border-radius:13px;display:grid;place-items:center;background:var(--tint);color:var(--accent)}.stat:nth-child(2) .tile{background:#e9f7ef;color:#3b9b6d}.stat:nth-child(3) .tile{background:#fff2dd;color:#c38b32}.stat:nth-child(4) .tile{background:#ffedf0;color:#e28293}.stat b{font-family:'Lexend','Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;font-size:23px;line-height:1.2;display:block}.stat small{font-size:10px;color:var(--muted)}.section-head{display:flex;justify-content:space-between;align-items:center;gap:14px;margin:26px 0 15px}.section-head h2{font-size:20px}.section-head p{font-size:11px;color:var(--muted);margin-top:3px}.text-btn{color:var(--accent-dark);font-size:12px;font-weight:700;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}.grade-row{display:grid;grid-template-columns:repeat(7,1fr);gap:11px;margin-bottom:24px}.grade-card{padding:14px 10px;text-align:center;border:1px solid var(--line);border-radius:16px;background:var(--paper);transition:.15s}.grade-card:hover{border-color:#8ed7e5;transform:translateY(-2px)}.grade-card.active{border-color:var(--accent);background:#e8f9fd;box-shadow:inset 0 0 0 1px var(--accent)}.grade-num{font-family:'Lexend','Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;font-size:22px;font-weight:600;color:var(--accent-dark);display:block}.grade-card small{display:block;font-size:10px;color:var(--muted);margin-top:3px}.units{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.unit-card{padding:21px;cursor:pointer;text-align:left;display:block;width:100%;transition:transform .15s,border-color .15s;position:relative}.unit-card:hover{transform:translateY(-3px);border-color:#a0d9e7}.unit-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.unit-icon{width:45px;height:45px;border-radius:13px;display:grid;place-items:center;background:#e5f8fb;color:#2099ab}.unit-card:nth-child(3n+2) .unit-icon{background:#edf3ff;color:#7195d1}.unit-card:nth-child(3n) .unit-icon{background:#fff4e5;color:#ba985b}.tag{font-size:10px;font-weight:700;color:var(--muted);background:var(--bg);border-radius:6px;padding:3px 7px;display:inline-block}.unit-card h3{font-size:15px;letter-spacing:-.025em;margin-bottom:2px}.unit-card p{font-size:11px;color:var(--muted);margin:2px 0 14px}.unit-meta{display:flex;gap:12px;font-size:10px;color:var(--muted);padding-bottom:14px}.unit-meta .icon{width:13px;height:13px;margin-right:3px}.progress-row{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);margin-bottom:6px}.progress{height:6px;border-radius:99px;background:#e9f2f6;overflow:hidden}.progress i{display:block;height:100%;background:var(--cyan);border-radius:99px;transition:width .3s}.unit-card .unit-foot{display:flex;align-items:center;justify-content:space-between;margin-top:13px;font-weight:600;font-size:10px;color:var(--accent-dark)}.banner{padding:18px 21px;display:flex;align-items:center;gap:15px;margin-top:24px;box-shadow:none;background:#edf8fc}.banner .icon{width:25px;height:25px;color:var(--accent)}.banner strong{font-size:12px}.banner p{font-size:10px;color:var(--muted);margin:2px 0}.banner .btn{margin-left:auto;font-size:11px;white-space:nowrap}.notice{font-size:10px;color:var(--muted);line-height:1.8;margin-top:20px;padding:0 3px}.notice button{color:var(--accent-dark);text-decoration:underline}.page-title{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:24px}.page-title h1{font-size:30px;margin:8px 0}.page-title p{color:var(--muted);font-size:12px}.breadcrumb{display:flex;align-items:center;gap:5px;color:var(--muted);font-size:11px;margin-bottom:12px}.breadcrumb button{padding:3px;color:var(--accent-dark);font-size:inherit}.breadcrumb .icon{width:13px;height:13px}.searchbar{display:flex;align-items:center;gap:9px;background:var(--paper);border:1px solid var(--line);border-radius:13px;padding:10px 15px;margin:18px 0}.searchbar .icon{color:var(--muted)}.searchbar input{border:0;outline:0;background:none;color:var(--ink);width:100%;min-width:0;font-size:13px}.searchbar:focus-within{border-color:var(--accent)}.searchbar:focus-within input{outline:none}.search-caption{color:var(--muted);font-size:11px;margin:-8px 0 15px}.unit-hero{padding:28px;background:linear-gradient(120deg,#e7faff,#f4fbff);box-shadow:none;margin-bottom:20px}.unit-hero h1{font-size:30px;margin:10px 0}.unit-hero p{font-size:12px;color:var(--muted)}.unit-hero .row{margin-top:18px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.tabs{display:flex;gap:6px;padding:5px;background:#e7f2f7;border-radius:13px;margin:20px 0;width:fit-content;max-width:100%}.tabs button{display:flex;align-items:center;gap:7px;padding:10px 17px;font-size:12px;font-weight:700;border-radius:9px;color:var(--muted);white-space:nowrap}.tabs button.active{color:var(--accent-dark);background:white;box-shadow:0 3px 10px #143b5110}.tabs .icon{width:16px;height:16px}.list{display:grid;gap:10px}.word-row{display:flex;align-items:center;gap:13px;padding:15px 18px}.word-row .num{color:var(--muted);font-size:11px;width:23px}.word-row .word-info{flex:1;min-width:0}.word-row strong{font-family:'Lexend','Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;font-size:15px;font-weight:500}.word-row .pos{font-size:10px;color:var(--muted);margin-left:7px}.word-row p{margin:2px 0;font-size:12px}.word-row .example{color:var(--muted);font-size:11px;font-style:italic}.word-row .state-tag{font-size:9px;color:var(--green);background:#e8f7ef;border-radius:6px;padding:3px 7px;white-space:nowrap}.grammar-card{padding:22px}.grammar-card details{margin-top:16px}.grammar-card summary{cursor:pointer;font-size:12px;color:var(--accent-dark);font-weight:700}.formula{padding:13px 16px;background:var(--tint);border-radius:12px;color:#007a8e;font-weight:600;font-size:13px;line-height:1.8;margin:13px 0}.grammar-card p{font-size:12px;color:var(--muted);line-height:1.9}.grammar-card .example-block{color:var(--ink);background:var(--bg);border-left:3px solid var(--cyan);padding:12px 16px;font-size:13px}.error-note{font-size:11px;color:#987440;background:#fff9eb;border-radius:10px;padding:12px;margin-top:12px}.study-wrap{max-width:770px;margin:0 auto}.study-top{display:flex;align-items:center;justify-content:space-between;margin:6px 0 16px;font-size:12px}.study-progress{height:6px;margin-bottom:20px}.flashcard{min-height:370px;padding:30px;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;border-color:#cbe9f0;position:relative;overflow:hidden}.flashcard::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 50% 0,#ebfaff 0,transparent 75%);pointer-events:none}.flashcard>*{position:relative}.flashcard .word{font-size:39px;line-height:1.3;font-weight:600;margin:24px 0 6px;overflow-wrap:anywhere;max-width:100%}.flashcard .flip-hint{font-size:11px;color:var(--muted);margin-top:30px;display:flex;align-items:center;gap:7px}.flashcard .translation{font-size:22px;color:var(--accent-dark);font-family:'Lexend','Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;line-height:1.5;max-width:100%;overflow-wrap:anywhere}.flashcard .example{max-width:540px;font-size:13px;line-height:1.9;color:var(--muted);margin-top:16px}.flash-face{background:none;width:100%;cursor:pointer;text-align:center;padding:10px}.flashcard .tag{background:var(--tint);color:var(--accent-dark)}.rating{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;margin-top:18px}.rating button{padding:13px 12px;font-size:12px;box-shadow:none}.rating .forgot{background:#fff0f2;color:#b64b60;border:1px solid #f4dce2}.rating .hard{background:#fff8e9;color:#aa8039;border:1px solid #efe3c8}.rating .remember{background:#e6f8f2;color:#21805d;border:1px solid #c9ede0}.rating small{display:block;font-size:9px;font-weight:400;margin-top:3px}.study-help{text-align:center;margin-top:17px;font-size:10px;color:var(--muted)}.typing{width:100%;max-width:470px;margin-top:23px;display:flex;gap:8px}.typing input{width:100%;min-width:0;padding:12px;border-radius:12px;border:1px solid var(--line);text-align:center;color:var(--ink);background:var(--paper)}.study-result{max-width:600px;padding:38px;text-align:center;margin:20px auto}.study-result img{width:130px;height:130px;object-fit:contain}.study-result h1{font-size:30px}.score{font-family:'Lexend','Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;font-size:52px;color:var(--accent-dark);line-height:1.4}.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:23px 0;background:var(--bg);border-radius:16px;padding:18px}.result-grid b{display:block;font-family:'Lexend','Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;font-size:22px}.result-grid small{font-size:10px;color:var(--muted)}.study-result .row{justify-content:center}.quiz-card{padding:30px}.quiz-card h2{font-size:21px;line-height:1.6;margin:17px 0 24px;letter-spacing:-.02em}.options{display:grid;grid-template-columns:1fr 1fr;gap:12px}.option{display:flex;align-items:center;gap:12px;padding:15px;text-align:left;border:1px solid var(--line);background:var(--paper);border-radius:13px;font-size:13px;transition:.15s;min-height:65px}.option b{border:1px solid var(--line);border-radius:8px;width:31px;height:31px;display:grid;place-items:center;flex-shrink:0;font-weight:600;font-size:12px;background:var(--bg)}.option:hover:not(:disabled){border-color:var(--accent);background:#f2fcff}.option.selected{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent);background:var(--tint)}.option.correct{border-color:#78caae;background:#eafaef}.option.wrong{border-color:#e5a6b7;background:#fff1f4}.option:disabled{opacity:1;color:var(--ink)}.feedback{padding:15px 18px;background:#effaf4;border-radius:13px;border:1px solid #d6ecdf;margin-top:20px;font-size:12px;line-height:1.9}.feedback.bad{background:#fff5f4;border-color:#f1ddd8}.feedback strong{display:block;color:var(--green)}.feedback.bad strong{color:var(--red)}.quiz-bottom{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:23px}.quiz-bottom small{font-size:11px;color:var(--muted)}.empty{text-align:center;padding:45px 24px}.empty img{width:110px}.empty h2{margin:8px 0;font-size:21px}.empty p{color:var(--muted);font-size:12px;margin-bottom:20px}.practice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.practice-tile{padding:24px}.practice-tile>.icon{width:31px;height:31px;color:var(--accent)}.practice-tile h3{margin-top:15px}.practice-tile p{min-height:65px;font-size:12px;color:var(--muted)}.practice-tile .btn{width:100%}.accuracy-ring{width:110px;height:110px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--cyan) var(--pct),#e8f2f7 0)}.accuracy-ring>div{width:88px;height:88px;border-radius:50%;background:var(--paper);display:flex;align-items:center;justify-content:center;flex-direction:column}.accuracy-ring b{font-family:'Lexend','Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;font-size:24px}.accuracy-ring small{font-size:9px;color:var(--muted)}.progress-panels{display:grid;grid-template-columns:1.7fr 1fr;gap:20px}.progress-panel{padding:24px}.progress-panel h3{margin-bottom:18px}.activity-bars{display:flex;justify-content:space-between;align-items:flex-end;height:145px;gap:12px;margin-top:20px}.activity-day{display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:7px;flex:1;height:100%;font-size:10px;color:var(--muted)}.activity-day i{background:#9ee2ec;width:100%;max-width:36px;border-radius:6px 6px 0 0;min-height:4px}.activity-day.active i{background:var(--cyan)}.activity-day b{font-size:10px;font-weight:500}.history-row{display:flex;align-items:center;justify-content:space-between;padding:13px 0;border-bottom:1px solid var(--line);font-size:12px;gap:10px}.history-row small{font-size:10px;color:var(--muted)}.history-row b{color:var(--accent-dark)}.settings{max-width:780px}.settings-block{padding:25px;margin:18px 0}.settings-block h3{margin-bottom:19px}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:16px 0;border-bottom:1px solid var(--line)}.setting-row:last-child{border:0}.setting-row b{display:block;font-size:12px}.setting-row small{display:block;color:var(--muted);font-size:10px;max-width:360px}.input,.select{background:var(--bg);color:var(--ink);padding:10px 12px;border:1px solid var(--line);border-radius:10px;max-width:240px}.input{width:210px}.switch{width:46px;height:26px;border-radius:99px;background:#cadce5;padding:3px;position:relative}.switch::after{content:'';display:block;width:20px;height:20px;border-radius:50%;background:#fff;transition:transform .2s}.switch[aria-checked=true]{background:var(--accent)}.switch[aria-checked=true]::after{transform:translateX(20px)}.danger-btn{color:var(--red)}footer{display:flex;align-items:center;justify-content:center;gap:5px;font-size:10px;color:#78919f;margin-top:35px}footer span{font-weight:700;color:#59859a}footer button{margin-left:10px;text-decoration:underline;font-size:10px}#navigation{display:flex;justify-content:center;gap:6px;background:var(--nav);border:1px solid var(--line);border-radius:20px;padding:7px;position:fixed;bottom:20px;left:50%;transform:translateX(-50%);z-index:30;box-shadow:0 8px 36px #164c6220;backdrop-filter:blur(20px)}#navigation button{display:flex;align-items:center;gap:8px;padding:11px 19px;border-radius:13px;color:var(--muted);font-size:11px;font-weight:600;white-space:nowrap}#navigation button.active{color:var(--accent-dark);background:#e1f7fc}#navigation button:hover{background:var(--tint)}#navigation .icon{width:18px;height:18px}dialog{color:var(--ink);border:1px solid var(--line);border-radius:24px;max-width:560px;width:calc(100% - 32px);padding:28px;background:var(--paper);box-shadow:0 20px 80px #12354a35}dialog::backdrop{background:#0a2e4e55;backdrop-filter:blur(4px)}.dialog-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:15px}.dialog-head h2{font-size:22px}dialog p{font-size:12px;line-height:1.9;color:var(--muted)}dialog .row{margin-top:20px;justify-content:flex-end}.dialog-list{max-height:50vh;overflow:auto}.dialog-list h3{font-size:13px;margin:18px 0 7px}.dialog-list a{font-size:10px;overflow-wrap:anywhere}.error-review{background:var(--bg);border-radius:13px;padding:14px;text-align:left;font-size:12px;margin-top:12px}.error-review p{font-size:11px;color:var(--muted)}.skip{position:fixed;top:-60px;left:15px;background:white;padding:12px;z-index:100}.skip:focus{top:10px}#toast{position:fixed;bottom:103px;left:50%;transform:translateX(-50%);background:#173d53;color:#fff;padding:11px 18px;border-radius:13px;font-size:12px;z-index:80;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:opacity .2s;max-width:calc(100% - 30px);text-align:center}#toast.visible{opacity:1}.hidden{display:none!important}.badge-success{background:#e9f7ef;color:var(--green)}
[data-theme=dark]{--bg:#102935;--paper:#183542;--ink:#e4f7fb;--muted:#9abaC5;--tint:#1b4350;--line:#2a4d5a;--nav:rgba(24,53,66,.96);--shadow:0 7px 24px #00151c35}[data-theme=dark] body{background:var(--bg)}[data-theme=dark] .hero,[data-theme=dark] .unit-hero{background:linear-gradient(120deg,#194653,#215866);border-color:#377385}[data-theme=dark] .hero p{color:#b9d8e1}[data-theme=dark] .hero h1 em{color:#40d8e6}[data-theme=dark] .hero-label{background:#ffffff15;color:#72e3ed}[data-theme=dark] .stat .tile,[data-theme=dark] .unit-icon,[data-theme=dark] .grade-card.active,[data-theme=dark] #navigation button.active,[data-theme=dark] .banner{background:#234a55;color:#57dfeb}[data-theme=dark] .tabs{background:#21414e}[data-theme=dark] .tabs button.active{background:var(--paper)}[data-theme=dark] .flashcard::before{background:radial-gradient(ellipse at top,#1c4551,transparent 80%)}[data-theme=dark] .option:hover:not(:disabled){background:#244653}[data-theme=dark] .option.correct,[data-theme=dark] .feedback{background:#183f35;border-color:#48745e}[data-theme=dark] .option.wrong,[data-theme=dark] .feedback.bad{background:#492c36;border-color:#815463}[data-theme=dark] .grade-num,[data-theme=dark] .text-btn,[data-theme=dark] .formula,[data-theme=dark] .flashcard .translation,[data-theme=dark] .score{color:#56d2df}[data-theme=dark] .error-note{background:#443c2b;color:#e1c585}[data-theme=dark] .progress{background:#274954}
@media(min-width:1400px){.shell{padding-top:8px}.hero{min-height:322px}.hero-dino{width:255px}}@media(max-width:1000px){.shell{padding:0 24px 110px}.hero-grid{grid-template-columns:1.7fr 1fr}.hero{padding:24px}.hero h1{font-size:29px}.hero-dino{width:207px;right:-16px}.hero-content{max-width:72%}.plan{padding:20px}.stat{padding:15px 13px;gap:10px}.unit-card{padding:17px}.units{gap:12px}.stat .tile{width:32px;height:32px}.header-greeting{display:none}}@media(max-width:760px){.shell{padding:0 18px 103px}#header{padding:17px 0;margin-bottom:20px;gap:10px}.brand strong{font-size:21px}.brand img{width:42px;height:42px}.brand small{font-size:8px;letter-spacing:1.1px}.header-right{gap:8px}.course-select{padding:8px}.course-select>span{display:none}.course-select .icon{display:none}.avatar{width:34px;height:34px}.hero-grid{grid-template-columns:1fr}.hero{min-height:282px;padding:25px}.hero h1{font-size:29px}.hero-content{max-width:68%}.hero-dino{width:218px;right:-14px}.plan{padding:18px}.plan>div:nth-child(2){display:grid;grid-template-columns:1fr 1fr;gap:12px}.plan-item{border:0;padding:10px 0}.goal{margin-top:7px}.stats{grid-template-columns:repeat(2,1fr);gap:10px;margin:14px 0 22px}.stat{padding:15px 18px}.stat b{font-size:23px}.grade-row{gap:8px;grid-template-columns:repeat(4,1fr)}.grade-card{padding:10px}.grade-num{font-size:20px}.units{grid-template-columns:repeat(2,1fr);gap:12px}.section-head{margin-top:22px}.section-head h2{font-size:19px}.section-head .text-btn{font-size:10px}.unit-card{padding:16px}.unit-card h3{font-size:14px}.unit-meta{gap:8px;font-size:9px;flex-wrap:wrap}.banner{padding:15px;flex-wrap:wrap;gap:10px}.banner .btn{margin-left:0}.banner>div{flex:1}.banner>div>p{max-width:280px}.page-title h1{font-size:26px}.page-title{flex-wrap:wrap;margin-bottom:16px}.page-title .btn{font-size:11px}.practice-grid{grid-template-columns:1fr}.practice-tile p{min-height:0}.practice-tile .btn{width:auto}.progress-panels{grid-template-columns:1fr}.word-row{padding:12px}.word-row strong{font-size:14px}.word-row .num{display:none}.word-row .state-tag{display:none}.unit-hero{padding:22px}.unit-hero h1{font-size:25px}.tabs{width:100%;justify-content:space-between}.tabs button{padding:9px 12px;font-size:11px}.tabs .icon{display:none}#navigation{width:calc(100% - 24px);bottom:12px;gap:0;padding:6px;justify-content:space-around;max-width:600px}#navigation button{font-size:9px;display:flex;flex-direction:column;gap:4px;padding:8px 10px;min-width:52px;border-radius:12px}#navigation .icon{width:19px;height:19px}.options{grid-template-columns:1fr}.quiz-card{padding:22px}.quiz-card h2{font-size:18px}.flashcard{min-height:340px;padding:22px}.flashcard .word{font-size:31px}.flashcard .translation{font-size:20px}.rating{gap:8px}.rating .btn{font-size:11px;padding:10px 6px}.setting-row{gap:15px}.input{width:150px}.select{max-width:150px}.setting-row small{max-width:230px}.study-result{padding:26px}.study-result h1{font-size:26px}footer{flex-wrap:wrap}.grammar-card{padding:18px}}@media(max-width:400px){.shell{padding:0 13px 100px}.hero{padding:20px}.hero h1{font-size:25px}.hero-content{max-width:70%}.hero-dino{width:187px;right:-27px}.hero p{max-width:200px;font-size:11px}.hero .btn{font-size:11px;padding:10px 12px}.units{grid-template-columns:1fr}.grade-row{grid-template-columns:repeat(4,1fr)}.plan-item .tile{width:32px;height:32px}.brand strong{font-size:19px}.brand small{font-size:7px}.course-select select{font-size:12px}.header-right .avatar{display:none}.stat{padding:13px}.stats{gap:8px}.setting-row{align-items:flex-start;flex-direction:column}.setting-row .select,.setting-row .input{max-width:none;width:100%}.setting-row small{max-width:none}.typing{flex-direction:column}.page-title h1{font-size:23px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

/* v1.0.1 fixes */
[data-theme=dark] .unit-card .unit-icon{background:#234a55;color:#57dfeb}
@media(max-width:760px){.rating .btn{flex-direction:column;gap:2px;padding:10px 4px;line-height:1.25;text-align:center}.rating .btn .icon{width:16px;height:16px}.rating small{font-size:9px}.quiz-bottom{flex-wrap:wrap}.quiz-bottom .btn{flex:1 1 100%;justify-content:center}}


/* v1.1.0 logo thương hiệu */
.brand img{width:auto;height:54px}.brand .logo-dark{display:none}[data-theme=dark] .brand .logo-light{display:none}[data-theme=dark] .brand .logo-dark{display:block}
@media(max-width:760px){.brand img{width:auto;height:46px}}@media(max-width:400px){.brand img{width:auto;height:42px}}
.hero-dino{bottom:6px}
.hero-dino{transform:scaleX(-1)}
@media(max-width:760px){.hero-dino{width:186px;right:-22px}}@media(max-width:400px){.hero-dino{width:168px;right:-30px}}

/* v1.2.0 học liệu lớp 9 */
.word-row .ipa{font-size:11px;color:var(--accent-dark);margin-left:7px;font-family:'Segoe UI','Arial Unicode MS',system-ui,sans-serif}.example-vi{display:block;font-style:normal;color:var(--muted);font-size:11px;margin-top:2px}.example-block .example-vi{font-size:12px}.contrast-note{font-size:11px;color:#3c6a7d;background:var(--tint);border-radius:10px;padding:12px;margin-top:12px;line-height:1.8}.flashcard .ipa{color:var(--muted);font-size:15px;margin-top:2px;font-family:'Segoe UI','Arial Unicode MS',system-ui,sans-serif}.quiz-typing{max-width:none;margin:4px 0 0}.quiz-typing input{text-align:left;font-size:15px}[data-theme=dark] .contrast-note{background:#1d4552;color:#b9dde6}
/* ===== Làm đề ===== */
.exam-banner{background:var(--tint)}
.exam-list{display:grid;gap:10px}
.exam-row{display:flex;align-items:center;gap:14px;padding:14px 18px;text-align:left;width:100%;box-shadow:none;border:1px solid var(--line)}
.exam-row:hover{border-color:var(--accent)}
.exam-row-main{flex:1;display:flex;flex-direction:column;min-width:0}
.exam-row-main strong{font-size:14px}
.exam-row-main small{color:var(--muted);font-size:11px}
.exam-wrap{max-width:860px;margin:0 auto}
.exam-bar{position:sticky;top:8px;z-index:5;display:flex;align-items:center;gap:14px;padding:12px 16px;margin-bottom:16px}
.exam-bar-mid{flex:1;min-width:0;display:flex;flex-direction:column}
.exam-bar-mid strong{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.exam-bar-mid small{color:var(--muted);font-size:11px}
.exam-timer{font-family:'Lexend',system-ui,sans-serif;font-weight:700;font-size:18px;color:var(--accent-dark);background:var(--tint);padding:4px 12px;border-radius:10px;font-variant-numeric:tabular-nums}
.exam-timer.urgent{color:var(--red);background:#fff1f4}
.exam-section{padding:22px 24px;margin-bottom:16px}
.exam-section h2{font-size:18px}
.exam-instr{font-style:italic;color:var(--muted);font-size:13px}
.exam-passage{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin:12px 0;font-size:14px;line-height:1.75}
.exam-passage h3{text-align:center;font-size:15px;margin-bottom:6px}
.exam-passage p{margin:0 0 10px}
.exam-sign{border:3px double var(--accent);border-radius:14px;padding:14px 18px;margin:12px auto;max-width:420px;text-align:center;font-weight:600;background:var(--paper)}
.exam-sign p{margin:0}
.shared-opts{list-style:none;padding:12px 16px;margin:10px 0;border:1px dashed var(--line);border-radius:12px}
.shared-opts li{margin:4px 0}
.exam-item{padding:14px 0;border-top:1px solid var(--line)}
.exam-item:first-of-type{border-top:0}
.exam-q{display:flex;gap:10px;align-items:flex-start;margin-bottom:10px;font-weight:500}
.exam-num{flex-shrink:0;min-width:30px;height:30px;border-radius:9px;background:var(--tint);color:var(--accent-dark);display:grid;place-items:center;font-weight:700;font-size:12px}
.exam-options .option{min-height:48px;padding:10px 12px}
.exam-options.long{grid-template-columns:1fr}
.exam-options.compact{grid-template-columns:repeat(4,1fr)}
.exam-options.compact .option{justify-content:center}
.exam-options u{text-decoration-thickness:2px;text-underline-offset:3px}
.exam-item.review.is-wrong .exam-num{background:#fff1f4;color:var(--red)}
.exam-item.review.is-right .exam-num{background:#eafaef;color:var(--green)}
.exam-explain{font-size:13px;margin-top:10px;color:var(--ink)}
.exam-passage-review summary{cursor:pointer;color:var(--accent-dark);font-weight:600;margin:8px 0}
.skill-table{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:8px;margin:18px 0;text-align:left}
.skill-table div{display:flex;justify-content:space-between;background:var(--bg);border-radius:10px;padding:8px 12px;font-size:12px}
.exam-result{max-width:720px}
@media(max-width:760px){.exam-bar{top:4px;gap:8px;padding:10px 12px;flex-wrap:wrap}.exam-bar-mid{order:3;flex-basis:100%}.exam-bar .btn{margin-left:auto}.exam-section{padding:16px}.exam-options{grid-template-columns:1fr}.exam-options.compact{grid-template-columns:repeat(4,1fr)}}
[data-theme=dark] .exam-timer.urgent{background:#3a1d26}
.exam-options u{font-weight:700;color:var(--accent-dark)}
[data-theme=dark] .exam-timer,[data-theme=dark] .exam-num,[data-theme=dark] .exam-options u{color:#56d2df}
[data-theme=dark] .exam-sign{border-color:#56d2df}
/* ===== Đăng nhập & quản trị ===== */
body.auth-mode #navigation{display:none}
.auth-wrap{max-width:440px;margin:10px auto 40px;text-align:center}
.auth-dino{width:120px;height:120px;object-fit:contain}
.auth-card{padding:28px 26px;text-align:left}
.auth-card h1{font-size:26px;margin:0 0 6px}
.auth-form{display:grid;gap:14px;margin-top:18px}
.auth-form label{display:grid;gap:6px;font-weight:600;font-size:13px}
.auth-form .input,.auth-form .select{width:100%}
.auth-form .btn{justify-content:center;width:100%}
.auth-msg{min-height:20px;margin:0;font-size:13px}
.auth-msg.bad{color:var(--red)}
.auth-msg.ok{color:var(--accent-dark)}
.auth-switch{margin-top:16px;text-align:center;font-size:13px}
.auth-foot{margin-top:16px}
.account-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-top:10px}
.account-grid div{background:var(--bg);border-radius:12px;padding:10px 12px;display:flex;flex-direction:column}
.account-grid small{color:var(--muted);font-size:11px}
.admin-chart{margin-top:16px}
.admin-tools{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:20px 0 12px}
.admin-tools .tabs{margin:0}
.admin-tools .input{flex:1;min-width:220px}
.admin-list{display:grid;gap:12px}
.admin-card{padding:16px 18px;box-shadow:none;border:1px solid var(--line)}
.admin-card-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}
.admin-card-head small{display:block;color:var(--muted);font-size:12px}
.admin-metrics{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-top:12px}
.admin-metrics div{background:var(--bg);border-radius:10px;padding:8px 10px;display:flex;flex-direction:column;font-size:13px}
.admin-metrics small{color:var(--muted);font-size:11px}
.admin-actions{margin-top:12px;gap:8px;flex-wrap:wrap}
.tag-warn{background:#fff4d6;color:#8a5a00}
.tag-bad{background:#fff1f4;color:var(--red)}
[data-theme=dark] .tag-warn{background:#4a3a12;color:#ffd77a}
[data-theme=dark] .tag-bad{background:#3a1d26;color:#ff9fb3}
@media(max-width:760px){.admin-metrics{grid-template-columns:1fr 1fr}.auth-card{padding:22px 18px}}
.auth-form .input,.auth-form .select{width:100%;max-width:none}.admin-chart .activity-bars{gap:6px}.admin-chart .activity-day{min-width:0}.admin-chart .activity-day span{white-space:nowrap}@media(max-width:760px){.admin-chart .activity-bars{gap:2px}.admin-chart .activity-day{font-size:8px}.admin-chart .activity-day b{font-size:9px}.searchbar input,#admSearch{width:100%;max-width:none}}
.admin-tabs{overflow-x:auto;scrollbar-width:none}@media(max-width:760px){.admin-tabs{justify-content:flex-start}.admin-tabs button{padding:9px 10px}}
body.auth-mode footer{display:none}