:root{--blue:#2448d8;--ink:#202637;--muted:#747b89;--line:#e3e6ed;--paper:#f7f8fb;--lime:#d8ef9d;--font:'Leelawadee UI',Tahoma,Arial,sans-serif}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--paper);font-family:var(--font);font-size:14px;line-height:1.65}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default}button{color:inherit}a{color:var(--blue)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #89a2ff;outline-offset:4px}button{border:0}button,a{touch-action:manipulation}[hidden]{display:none!important}.sidebar{width:236px;position:fixed;inset:0 auto 0 0;background:white;border-right:1px solid var(--line);padding:32px 22px 18px;display:flex;flex-direction:column;overflow:auto;z-index:10}.brand{display:flex;gap:11px;align-items:center;text-decoration:none;color:var(--ink);font-size:25px;font-weight:800;letter-spacing:-1px}.brand-icon{display:grid;place-items:center;position:relative;border-radius:12px;background:var(--blue);color:white;width:43px;height:43px;font:italic bold 35px Georgia}.brand-icon span{color:var(--lime);position:absolute;right:4px;top:-12px}.brand-sub{display:block;letter-spacing:1.8px;font-size:8px;font-weight:600;line-height:1.5;margin-top:1px;color:var(--muted)}.side-label{font-size:9px;letter-spacing:1.8px;color:#8b91a0;margin:40px 12px 12px;font-weight:700}.nav{display:grid;gap:5px}.nav button{display:flex;align-items:center;text-align:left;gap:10px;background:none;border-radius:9px;padding:11px 12px;font-size:12px;color:#666e80;min-height:42px}.nav button>span:first-child{font-size:19px;line-height:1;width:21px}.nav button.active{background:#edf1ff;color:var(--blue);font-weight:700}.nav-count{margin-left:auto;background:#e1e8ff;border-radius:5px;padding:1px 5px;font-size:10px}.nav button:not(.active) .nav-count{background:#f1f3f7}.category-label{margin-top:30px}.category-nav{display:grid;gap:1px}.category-nav button{display:flex;align-items:center;text-align:left;gap:10px;padding:7px 12px;background:none;color:#667083;font-size:12px;border-radius:7px;min-height:34px}.category-nav button:hover,.category-nav button.active{background:#f1f4fa;color:var(--blue)}.cat-dot{width:6px;height:6px;flex-shrink:0;border-radius:100%;background:var(--cat-color,#8ca0f7)}.cat-number{margin-left:auto;font:10px Arial;color:#949bad}.side-bottom{border-top:1px solid var(--line);margin:24px 10px 0;padding-top:19px}.small-symbol{font:italic 22px Georgia;color:var(--blue);margin-bottom:8px}.side-bottom strong{font-size:12px}.side-bottom p{font-size:11px;color:var(--muted);line-height:1.8;margin:6px 0}.text-button{background:transparent;font-size:11px;color:var(--muted);padding:6px 0}.text-button:hover{color:var(--blue)}.workspace{margin-left:236px}.topbar{height:76px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 42px;background:rgba(255,255,255,.75);gap:15px}.topbar>span:first-child{font:9px Arial;letter-spacing:1.6px;color:var(--muted)}.top-tag{font-size:10px;color:#5e6679;display:flex;align-items:center;gap:9px}.top-tag i{width:6px;height:6px;border-radius:50%;background:#8ba966}.top-tag>span{color:#9298a3;font-size:10px;border-left:1px solid #d9dde5;padding-left:9px}main{max-width:1500px;margin:auto;padding:32px 42px 0}.hero{min-height:320px;border-radius:16px;background:var(--blue);position:relative;display:grid;grid-template-columns:1.05fr 1fr;overflow:hidden;color:white}.hero-copy{padding:35px 36px;z-index:1}.eyebrow{font:9px Arial,sans-serif;font-weight:700;letter-spacing:1.7px;display:flex;align-items:center;gap:9px}.short-line{width:24px;height:1px;background:#b2c0ff}.hero .eyebrow{color:#c9d3ff;font-size:8px}.hero h1{font-size:43px;line-height:1.38;font-weight:600;letter-spacing:-1.2px;margin:20px 0 12px}.serif{color:var(--lime)}.hero p{font-size:12px;line-height:1.9;color:#d4ddff}.hero-button{margin-top:9px;padding:10px 14px;background:white;color:#2944ba;border-radius:6px;font-size:11px;box-shadow:0 3px 8px #0d24821f}.hero-button span{margin-left:16px;font-size:17px}.hero-art{position:relative;min-height:320px}.orbit{position:absolute;border:1px solid #ffffff26;width:300px;height:300px;border-radius:50%;top:33px;left:15px;transform:rotate(-24deg)}.orbit-two{width:390px;height:210px;left:-25px;top:88px;transform:rotate(-34deg)}.floating{position:absolute;border:1px solid #ffffff33;border-radius:10px;box-shadow:0 15px 25px #11297e3b;font:italic 31px Georgia;padding:15px 26px;min-width:155px;display:flex;flex-direction:column}.floating span{font:10px var(--font);margin-top:3px;letter-spacing:0}.word-one{top:58px;left:16px;background:#3b5de1;transform:rotate(-8deg)}.word-two{top:132px;left:139px;background:#f6f8ff;color:#273da3;transform:rotate(8deg);z-index:2}.word-three{top:222px;left:0;background:var(--lime);color:#304129;transform:rotate(-4deg);font-size:27px}.art-note{position:absolute;font:italic 13px Georgia;right:28px;top:35px;color:#d4ddff;transform:rotate(7deg)}.art-star{position:absolute;right:36px;bottom:52px;font-size:48px;color:var(--lime)}.art-bottom{position:absolute;bottom:20px;left:40px;font:7px Arial;letter-spacing:2px;color:#b3c0ff}.stats{display:grid;grid-template-columns:repeat(4,1fr);padding:23px 0;border-bottom:1px solid var(--line);margin-bottom:34px}.stats>div{display:flex;gap:12px;align-items:baseline;border-right:1px solid var(--line);padding:0 20px}.stats>div:first-child{padding-left:2px}.stats>div:last-child{border:0}.stats strong{font-size:23px;letter-spacing:-1px;font-family:Arial,sans-serif}.stats span{font-size:10px;color:var(--muted)}.dark{color:#8b91a0;font-size:8px}.section-title{display:flex;justify-content:space-between;align-items:end;gap:12px;margin-bottom:22px}h2{font-size:23px;line-height:1.5;letter-spacing:-.5px;margin:6px 0 0}.section-side{font-size:10px;color:#959ba7;margin-bottom:4px}.search-wrap{display:flex;gap:12px;align-items:center;border:1px solid var(--line);background:white;border-radius:9px;padding:0 15px;height:50px}.search-wrap>span{font:28px Georgia;color:#8792aa}.search-wrap input{min-width:0;flex:1;border:0;outline:none;background:none;font-size:12px;color:var(--ink);height:100%}.search-wrap:focus-within{border-color:#8ca1fa;box-shadow:0 0 0 3px #2448d80b}.search-wrap input::placeholder{color:#9a9fab}kbd{font:10px monospace;border:1px solid var(--line);border-radius:4px;padding:1px 6px;color:#98a0b0}.filters{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:15px 0 20px}#levels{display:flex;gap:7px;flex-wrap:wrap}.level-button{font:11px var(--font);padding:5px 14px;border:1px solid var(--line);border-radius:5px;background:transparent;color:#808797;min-height:32px}.level-button.active{background:var(--ink);border-color:var(--ink);color:white}.results-bar{display:flex;justify-content:space-between;gap:12px;margin-bottom:14px;color:#7c8494;font-size:11px}#category-caption{font-size:10px}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.card{border:1px solid var(--line);border-radius:11px;background:white;display:flex;flex-direction:column;min-width:0;overflow:hidden;transition:transform .18s,box-shadow .18s,border-color .18s}.card:hover{transform:translateY(-3px);box-shadow:0 10px 25px #16244c09;border-color:#c6cfee}.card-top{display:flex;align-items:center;justify-content:space-between;padding:18px 18px 0}.category-tag{font-size:9px;display:flex;gap:6px;align-items:center;color:#858b99}.card-number{font:10px Arial;color:#b0b6c3}.card-title{padding:0 18px}.card-title h3{font-size:17px;line-height:1.5;margin:14px 0 1px;font-weight:650}.card-subtitle{font:italic 11px Georgia;color:#9b9fac;margin:4px 0 17px}.word-chips{display:flex;gap:6px;flex-wrap:wrap;padding:0 18px;margin-bottom:16px}.word-chip{border:1px solid #e8ebf1;background:#f8f9fc;border-radius:5px;padding:4px 9px;font:11px Arial;min-height:29px}.word-chip:hover{background:#e9eeff;border-color:#c6d1ff;color:var(--blue)}.word-chip.saved:after{content:' ♥';color:var(--blue);font-size:9px}.card-footer{margin-top:auto;padding:10px 18px;border-top:1px solid #eff1f5;display:flex;align-items:center;justify-content:space-between;gap:8px}.card-footer>span{font-size:9px;color:#929aaa}.open-group{font-size:10px;background:transparent;color:var(--blue);padding:5px 0}.open-group span{margin-left:6px}.empty{grid-column:1/-1;text-align:center;padding:60px 20px;border:1px dashed #cdd4e3;border-radius:12px;background:#ffffff8c}.empty-symbol{font:42px Georgia;color:#9aaae3}.empty h3{font-size:19px}.empty p{color:var(--muted);font-size:13px}.primary{padding:11px 18px;border-radius:7px;background:var(--blue);color:white;font-size:12px}.secondary{padding:10px 16px;border-radius:7px;border:1px solid var(--line);background:white;font-size:12px}footer{margin-top:42px;padding:22px 0 26px;border-top:1px solid var(--line);font-size:10px;color:#939aa9}footer>span{font:11px Arial}footer b{color:var(--blue);margin:0 4px}footer p{font-size:9px;margin:7px 0 0;line-height:1.8}dialog{border:0;border-radius:17px;padding:0;width:min(960px,calc(100% - 40px));max-height:90dvh;color:var(--ink);background:#f8f9fc;box-shadow:0 30px 100px #111c4c40}dialog::backdrop{background:#111b3c7d;backdrop-filter:blur(5px)}.detail-header{padding:27px 32px 22px;background:white;border-bottom:1px solid var(--line);position:relative}.detail-header h2{font-size:25px;padding-right:25px}.detail-header>p{font-size:12px;color:var(--muted);margin:8px 0 0}.close{position:absolute;right:18px;top:16px;background:#f1f3f8;width:35px;height:35px;border-radius:50%;font-size:25px;line-height:1;color:#71798d}.detail-layout{display:grid;grid-template-columns:1.25fr 1fr;gap:22px;padding:25px 32px 30px}.word-panel{min-width:0}.word-heading{display:flex;align-items:center;justify-content:space-between;gap:10px}.word-heading h3{font:43px Georgia;margin:8px 0;overflow-wrap:anywhere;line-height:1.2}.word-heading .sound{border:1px solid var(--line);border-radius:50%;width:39px;height:39px;background:white;font-size:17px;flex-shrink:0}.word-meta{display:flex;gap:8px;flex-wrap:wrap;align-items:center;font-size:10px;color:#7e8595}.level-tag{background:#e9eeff;color:var(--blue);padding:3px 7px;border-radius:4px;font:10px Arial}.save-button{margin-left:auto;border:1px solid #dde3f2;padding:5px 9px;border-radius:5px;background:white;color:var(--blue);font-size:10px}.save-button.is-saved{background:#edf1ff}.nuance{font-size:16px;line-height:1.85;margin:21px 0}.block-label{font-size:9px;letter-spacing:1.4px;color:#8d95a5;font-family:Arial;margin:20px 0 7px;font-weight:700}.pattern{padding:13px 15px;background:#eef1f8;border-radius:8px;font:13px/1.7 Consolas,monospace;overflow-wrap:anywhere}.example{border-left:3px solid var(--blue);background:white;padding:15px 18px;border-radius:0 8px 8px 0}.example p{font:18px/1.6 Georgia;margin:0 0 8px}.example .translation{font:12px/1.8 var(--font);color:#7c8495;margin:0}.example button{margin-top:10px;padding:0;background:none;color:var(--blue);font-size:10px}.mindset-box{background:#eaf0dc;border:1px solid #dfe7cc;padding:16px;border-radius:9px;margin-top:23px}.mindset-box .block-label{margin:0 0 7px;color:#6b7b4e}.mindset-box p{font-size:12px;margin:0;line-height:1.9;color:#485a3d}.dictionary-link{display:inline-block;font-size:10px;margin-top:18px;color:#808aa1}.comparison-panel{border-left:1px solid var(--line);padding-left:22px}.comparison-panel>h3{font-size:14px;margin:3px 0}.comparison-panel>p{font-size:10px;color:var(--muted);margin:0 0 14px}.compare-word{display:block;text-align:left;width:100%;padding:12px 13px;border:1px solid var(--line);background:white;border-radius:8px;margin-bottom:8px}.compare-word.active{border-color:#9fb2ff;background:#edf1ff}.compare-top{display:flex;align-items:center;gap:7px}.compare-top strong{font:17px Georgia}.compare-top .level-tag{margin-left:auto;font-size:8px}.compare-word p{font-size:11px;line-height:1.8;color:#777f90;margin:5px 0 0}.compare-word.active strong{color:var(--blue)}.note-box{padding:13px 0;font-size:11px;color:#7b8090;line-height:1.9}.note-box strong{display:block;color:#5c6272;font-size:11px;margin-bottom:4px}.about-content{position:relative;padding:35px 40px;max-width:740px;margin:auto}.about-content p,.about-content li{font-size:13px;line-height:1.9;color:#697286}.about-content h3{font-size:16px;margin-top:25px}.about-content h2{padding-right:25px}.toast{position:fixed;bottom:25px;left:50%;transform:translate(-50%,25px);padding:12px 20px;background:#202637;color:white;border-radius:8px;font-size:12px;max-width:90vw;z-index:100;opacity:0;transition:opacity .2s,transform .2s;pointer-events:none}.toast.visible{opacity:1;transform:translate(-50%,0)}.quiz-shell{max-width:760px;margin:20px auto 50px}.quiz-intro{background:white;border:1px solid var(--line);border-radius:14px;padding:35px}.quiz-intro h2{font-size:29px}.quiz-intro p{color:var(--muted);font-size:13px;line-height:1.9}.quiz-controls{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:24px}.quiz-controls select{padding:10px 12px;border:1px solid var(--line);border-radius:6px;background:white;max-width:100%}.quiz-controls label{font-size:12px}.quiz-progress{height:4px;background:#e3e8f3;border-radius:2px;overflow:hidden;margin:18px 0 26px}.quiz-progress span{display:block;height:100%;background:var(--blue)}.quiz-top{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);gap:12px}.question{font-size:23px!important;color:var(--ink)!important;font-weight:600;margin:23px 0!important}.quiz-options{display:grid;grid-template-columns:1fr 1fr;gap:10px}.quiz-option{padding:17px 15px;border:1px solid var(--line);background:#fafbfe;border-radius:8px;text-align:left;font:20px Georgia}.quiz-option:hover:not(:disabled){border-color:#8da5ff;background:#f0f3ff}.quiz-option.correct{background:#eaf3df;border-color:#9ebc76;color:#465c2d}.quiz-option.wrong{background:#fff0ec;border-color:#e9b3a7;color:#944f40}.feedback{padding:17px 19px;background:#f1f4fa;border-radius:9px;margin-top:18px;font-size:12px;line-height:1.9}.feedback strong{font-size:14px}.feedback p{margin:6px 0}.quiz-actions{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:20px}.score-circle{display:grid;place-items:center;width:120px;height:120px;border:8px solid #e3ebcc;border-radius:50%;margin:20px auto;color:var(--blue);font:35px Georgia}.quiz-result{text-align:center}.review-list{text-align:left;margin:20px 0}.review-list button{display:flex;justify-content:space-between;gap:12px;align-items:center;width:100%;padding:12px 0;border-bottom:1px solid var(--line);background:none;font-size:12px}.skip{position:fixed;left:10px;top:-70px;background:white;padding:10px 20px;z-index:100}.skip:focus{top:10px}.no-js{position:fixed;bottom:0;background:white;padding:20px;width:100%;z-index:100}
@media(min-width:1450px){.hero{min-height:345px}.hero-copy{padding-left:42px}.hero-art{max-width:450px;width:100%;justify-self:center}.hero h1{font-size:48px}.cards{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media(max-width:1150px){.sidebar{width:210px;padding:27px 15px}.workspace{margin-left:210px}main{padding:27px 28px 0}.topbar{padding:0 28px}.hero h1{font-size:37px}.hero-copy{padding:29px}.floating{font-size:27px;min-width:130px;padding:13px 19px}.word-two{left:100px}.word-three{font-size:24px;left:-8px}.art-note{right:12px}.art-star{right:12px}.stats>div{flex-direction:column;gap:0;padding:0 16px}.section-side{display:none}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:800px){.sidebar{position:static;width:auto;padding:18px 22px 0;border-right:0;overflow:visible}.brand{font-size:23px}.brand-icon{width:37px;height:37px;font-size:31px}.side-label,.side-bottom{display:none}.nav{display:flex;margin:17px -2px 0;gap:5px}.nav button{padding:9px 11px;flex:1;justify-content:center;font-size:11px;border-radius:8px 8px 0 0;white-space:nowrap}.nav button>span:first-child{font-size:16px;width:auto}.nav-count{margin-left:0}.category-nav{display:flex;overflow:auto;gap:6px;padding:12px 0;order:4;scrollbar-width:thin}.category-nav button{flex-shrink:0;font-size:10px;padding:5px 9px;border:1px solid #ebedf3;border-radius:20px;min-height:29px}.cat-number{display:none}.workspace{margin-left:0}.topbar{height:46px;padding:0 22px}.topbar>span:first-child{font-size:8px;letter-spacing:1px}.top-tag>span{display:none}main{padding:22px 22px 0}.hero{min-height:310px}.hero-copy{padding:28px}.hero h1{font-size:37px}.hero p{font-size:11px}.hero .eyebrow{font-size:7px;letter-spacing:1px}.hero-button{font-size:10px}.hero-art{transform:scale(.88);transform-origin:center}.stats{margin-bottom:26px}.stats strong{font-size:23px}.section-title h2{font-size:22px}.detail-layout{padding:22px;gap:18px}.detail-header{padding:24px 22px}.comparison-panel{padding-left:18px}.word-heading h3{font-size:35px}}
@media(max-width:560px){.sidebar{padding:16px 16px 0}.brand-sub{font-size:7px}.topbar{padding:0 17px}.topbar>span:first-child{font-size:7px;letter-spacing:.8px}.nav button{font-size:10px;gap:5px;padding:9px 6px}.nav-count{font-size:9px}.hero{grid-template-columns:1fr;min-height:0;border-radius:12px}.hero-copy{padding:27px 25px}.hero h1{font-size:37px;margin-top:17px}.hero p{font-size:12px}.hero-art{display:none}.hero-button{font-size:11px;margin-top:7px}main{padding:18px 16px 0}.stats{gap:0;padding:20px 0}.stats>div{padding:0 9px}.stats>div:first-child{padding-left:0}.stats strong{font-size:21px}.stats span{font-size:8px;white-space:nowrap}.stats>div:last-child strong{font-size:17px}.cards{grid-template-columns:1fr;gap:12px}.card-top{padding-top:16px}.card-title h3{font-size:19px}.word-chip{font-size:13px;padding:5px 11px}.card-subtitle{font-size:12px}.category-tag{font-size:10px}.card-footer>span,.open-group{font-size:11px}.section-title h2{font-size:22px}.search-wrap{height:48px;padding:0 11px;gap:8px}.search-wrap input{font-size:11px}.search-wrap kbd{display:none}.filters{gap:6px}.level-button{padding:5px 9px;font-size:10px}#levels{gap:4px}.filters .text-button{font-size:9px;white-space:nowrap}.results-bar{font-size:10px}dialog{width:calc(100% - 20px);max-height:94dvh;border-radius:12px}.detail-header h2{font-size:22px}.detail-layout{grid-template-columns:1fr;padding:20px}.comparison-panel{border:0;border-top:1px solid var(--line);padding:22px 0 0}.word-heading h3{font-size:40px}.nuance{font-size:16px}.compare-word p{font-size:12px}.note-box{font-size:12px}.about-content{padding:28px 22px}.about-content h2{font-size:22px}.quiz-intro{padding:24px 20px}.quiz-intro h2{font-size:25px}.quiz-options{grid-template-columns:1fr}.question{font-size:20px!important}.quiz-top{font-size:10px}.quiz-controls{align-items:stretch;flex-direction:column}.quiz-result .quiz-controls{align-items:center}.quiz-controls .primary{width:100%}.toast{width:max-content;text-align:center}footer p{font-size:9px}.desktop-break{display:none}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}.card:hover{transform:none}}