:root{--paper:#f5f3eb;--card:#fffef9;--ink:#213d35;--muted:#67766d;--green:#174f43;--light:#e5eee1;--line:#d8ddd1;--yellow:#efe49c;--rust:#a6462c;--radius:18px;--shadow:0 14px 40px #254c3810}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Trebuchet MS","PingFang TC",sans-serif;font-size:15px;line-height:1.55}body:before{content:"";position:fixed;inset:0;pointer-events:none;background-image:radial-gradient(#74857216 .6px,transparent .6px);background-size:7px 7px;z-index:-1}button,input,select,textarea{font:inherit}button,a,input,select,textarea{touch-action:manipulation}button,a{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:wait;opacity:.55}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.13}h1,h2,.serif{font-family:Georgia,"Songti TC",serif;font-weight:400}h1{font-size:clamp(34px,4vw,54px);letter-spacing:-1.8px}h2{font-size:30px;letter-spacing:-.7px}h3{font-size:17px}.muted{color:var(--muted)}.eyebrow{text-transform:uppercase;font-size:11px;letter-spacing:2px;font-weight:bold;color:var(--muted)}.skip{position:fixed;top:-100px;background:var(--green);color:white;padding:10px;z-index:20}.skip:focus{top:10px}:focus-visible{outline:3px solid #bb922e;outline-offset:4px}.app{display:grid;grid-template-columns:232px 1fr;min-height:100vh}.rail{border-right:1px solid var(--line);padding:32px 22px;display:flex;flex-direction:column;gap:38px;position:sticky;top:0;height:100vh;background:#f5f3ebeb}.brand{display:flex;align-items:center;gap:11px;font-size:21px;letter-spacing:-.7px;font-weight:bold;line-height:1.2}.brand img{width:38px;height:38px}.brand small{display:block;font-size:10px;letter-spacing:2.5px;font-weight:normal;color:var(--muted);margin-top:4px}.rail nav{display:grid;gap:7px}.nav-link{display:flex;align-items:center;gap:13px;padding:12px 14px;border-radius:8px;color:var(--muted);font-size:14px}.nav-link:hover{background:#e9ecdf;text-decoration:none}.nav-link.active{background:var(--green);color:#fffef9}.nav-number{font-size:11px;opacity:.6;font-variant-numeric:tabular-nums}.rail-bottom{margin-top:auto;border-top:1px solid var(--line);padding-top:22px;font-size:12px}.rail-bottom strong{display:block;margin-bottom:5px}.shell{min-width:0}.topbar{height:86px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;padding:0 48px;gap:20px}.topbar .crumb{font-size:13px;color:var(--muted)}.account{display:flex;align-items:center;gap:12px;font-size:12px}.avatar{width:32px;height:32px;display:grid;place-items:center;background:var(--light);color:var(--green);border-radius:50%;font-weight:bold}main{max-width:1370px;margin:auto;padding:42px 48px 64px;animation:arrive .35s ease}.page-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:30px}.page-head p{margin-top:12px;max-width:630px;color:var(--muted)}.page-head .eyebrow{margin-bottom:12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;border:1px solid var(--green);border-radius:8px;padding:12px 20px;background:var(--green);color:white;font-size:13px;font-weight:bold;line-height:1.4;white-space:nowrap}.btn:hover{background:#236452;text-decoration:none}.btn.secondary{background:transparent;color:var(--green);border-color:var(--line)}.btn.secondary:hover{background:var(--light)}.btn.small{padding:8px 13px;font-size:12px}.btn.light{background:var(--card);border-color:var(--card);color:var(--green)}.text-btn{background:transparent;border:0;color:var(--green);padding:6px 0;text-decoration:underline;text-underline-offset:4px;font-size:13px}.actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.hero{display:grid;grid-template-columns:1.13fr 1fr;gap:38px;align-items:center;padding:20px 0 44px}.hero h1{font-size:clamp(44px,5.1vw,76px);line-height:1.04;letter-spacing:-3.2px;margin:21px 0}.hero h1 em{font-weight:400;color:var(--green)}.hero-copy>p{max-width:435px;color:var(--muted);font-size:16px;margin:22px 0 30px}.hero-note{font-size:12px!important;margin:16px 0!important}.hero-art{position:relative;padding:30px 10px 30px 30px}.hero-art:before{content:"";position:absolute;inset:5px 0;border:1px solid #c9d4c3;border-radius:50%;transform:rotate(-20deg);background:radial-gradient(ellipse,#e2e8ce 0,transparent 69%)}.word-card{position:relative;border-radius:4px 22px 22px 4px;background:var(--card);padding:32px 30px 28px 42px;transform:rotate(-4deg);box-shadow:7px 12px 0 #d9decf,13px 22px 40px #174f4315;border:1px solid #d4d9cb;border-left:9px solid var(--green)}.word-card .word{font:clamp(38px,4vw,57px)/1.1 Georgia,serif;margin:25px 0 8px;letter-spacing:-2px}.word-card .pronounce{font-size:13px;color:var(--muted)}.word-card .definition{padding:24px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:22px 0}.word-card .example{font:italic 18px/1.55 Georgia,serif}.word-card mark{background:var(--yellow);color:inherit;padding:1px 4px}.card-foot{display:flex;justify-content:space-between;align-items:center;margin-top:28px;font-size:11px}.round{width:41px;height:41px;border-radius:50%;background:var(--green);color:white;border:0;font-size:17px}.stamp{position:absolute;right:-2px;top:1px;background:var(--yellow);border:1px solid #d9cc84;padding:13px 16px;transform:rotate(9deg);border-radius:4px;font:19px Georgia,serif;box-shadow:var(--shadow)}.features{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:10px 0 35px}.feature{padding:24px 22px 25px 0}.feature+.feature{border-left:1px solid var(--line);padding-left:26px}.feature b{font-size:13px;display:block;margin:10px 0 6px}.feature p{font-size:12px;color:var(--muted);max-width:250px}.feature .number{font:italic 22px Georgia,serif;color:#8c9c7a}.section-title{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:28px 0 20px}.modes{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.mode{position:relative;text-align:left;border:1px solid var(--line);border-radius:var(--radius);padding:23px 18px;background:var(--card);color:var(--ink);min-height:176px;transition:transform .2s,border-color .2s}.mode:hover{transform:translateY(-4px);border-color:#72927d}.mode .mode-icon{display:grid;place-items:center;width:34px;height:34px;background:var(--light);border-radius:9px;margin-bottom:21px;font:20px Georgia,serif}.mode:nth-child(2) .mode-icon{background:#f5e7ba}.mode:nth-child(3) .mode-icon{background:#eeded1}.mode:nth-child(4) .mode-icon{background:#dde6eb}.mode strong{display:block;font-size:14px;margin-bottom:6px}.mode p{font-size:12px;color:var(--muted)}.mode .arrow{position:absolute;top:23px;right:18px;color:var(--muted)}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:28px}.stat{padding:23px 26px;border:1px solid var(--line);border-radius:var(--radius);background:var(--card)}.stat strong{display:block;font:42px Georgia,serif;margin-bottom:7px}.stat span{font-size:12px;color:var(--muted)}.grid-two{display:grid;grid-template-columns:1fr 1fr;gap:22px}.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:27px;margin-bottom:22px;box-shadow:var(--shadow)}.panel h2{font-size:25px;margin-bottom:13px}.panel>p{color:var(--muted);font-size:13px}.panel.green{background:var(--green);color:var(--card);border-color:var(--green)}.panel.green p{color:#d5e2d1;margin:15px 0 23px}.steps{display:grid;gap:18px;margin-top:24px}.step{display:flex;align-items:start;gap:14px;font-size:13px}.step span{display:grid;place-items:center;flex-shrink:0;width:27px;height:27px;border-radius:50%;background:var(--light);color:var(--green);font-size:12px}.step p{color:var(--muted);font-size:12px;margin-top:4px}.notice{background:#eeeacb;border:1px solid #ded6a5;border-radius:9px;padding:13px 16px;font-size:12px;margin-bottom:22px;color:#5d5837}.empty{text-align:center;padding:50px 20px;border:1px dashed #c4ccbd;border-radius:var(--radius);color:var(--muted)}.empty h2{color:var(--ink);margin:0 0 12px}.empty p{max-width:460px;margin:0 auto 20px;font-size:14px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.form-grid .wide{grid-column:1/-1}label{display:block;font-size:12px;color:var(--ink);font-weight:bold}label>input,label>select,label>textarea{margin-top:7px}input,select,textarea{width:100%;padding:11px 12px;border:1px solid #c9d1c4;border-radius:7px;background:#fffefa;color:var(--ink);min-height:44px}textarea{resize:vertical;min-height:88px}input[type=checkbox]{width:17px;height:17px;min-height:0;accent-color:var(--green)}.check{display:flex;align-items:center;gap:9px;font-weight:normal}.check input{margin:0}.form-footer{grid-column:1/-1;padding-top:6px;display:flex;gap:12px;align-items:center}.help{font-size:11px;color:var(--muted);font-weight:normal;display:block;margin-top:5px}.login-wrap{max-width:465px;margin:25px auto}.login-wrap h1{margin:14px 0}.login-wrap .panel{margin-top:26px;padding:32px}.login-wrap label{margin-bottom:20px}.login-wrap .btn{width:100%}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:12px;background:var(--card)}table{border-collapse:collapse;width:100%;text-align:left;white-space:normal;font-size:13px}th{font-size:10px;letter-spacing:1px;text-transform:uppercase;font-weight:normal;color:var(--muted);padding:15px 18px;background:#eef0e5;border-bottom:1px solid var(--line)}td{padding:15px 18px;border-bottom:1px solid #e4e7dd}tr:last-child td{border-bottom:0}td.word{font:20px Georgia,serif}td small{display:block;font:11px "Trebuchet MS",sans-serif;color:var(--muted);margin-top:4px}.badge{display:inline-block;border:1px solid #c5d5bd;border-radius:50px;padding:3px 9px;font-size:10px;color:var(--green);background:#eaf1e3;white-space:nowrap}.badge.draft{background:#f5eccc;border-color:#e1d59f;color:#77682f}.toolbar{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:20px;flex-wrap:wrap}.toolbar select{max-width:290px}.list-cards{display:grid;gap:14px}.assignment-card{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:22px;background:var(--card);border:1px solid var(--line);border-radius:14px}.assignment-card h3{font-family:Georgia,serif;font-size:23px;font-weight:normal;margin-bottom:7px}.assignment-card p{font-size:12px;color:var(--muted)}.quiz-wrap{max-width:740px;margin:0 auto}.quiz-head{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:15px}.progress{height:5px;border-radius:5px;background:#dce3d5;margin-bottom:26px;overflow:hidden}.progress-fill{height:100%;background:var(--green);width:0}.question-card{padding:42px 42px 34px;border:1px solid var(--line);border-radius:var(--radius);background:var(--card);box-shadow:var(--shadow)}.question-card .prompt{font:32px/1.35 Georgia,serif;letter-spacing:-.6px;margin:28px 0}.question-card .spelling{margin:36px 0;text-align:center}.speak-btn{width:83px;height:83px;border-radius:50%;border:1px solid #c5d5bb;background:var(--light);color:var(--green);font-size:25px;box-shadow:0 0 0 10px #edf1e7}.speech-controls{display:flex;align-items:center;justify-content:center;gap:12px;margin-top:24px;color:var(--muted);font-size:11px}.speech-controls select{max-width:110px;min-height:34px;padding:5px;font-size:12px}.answer-input{font:28px Georgia,serif;padding:17px 18px;letter-spacing:.3px}.choices{display:grid;gap:12px;margin:26px 0}.choice{display:flex;align-items:center;gap:13px;text-align:left;padding:16px;border:1px solid var(--line);background:var(--card);border-radius:9px;cursor:pointer;font-size:14px;font-weight:normal}.choice:has(input:checked){border-color:var(--green);background:var(--light)}.choice input{width:17px;height:17px;min-height:0;accent-color:var(--green);margin:0}.quiz-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:28px;font-size:11px;color:var(--muted)}.feedback{border-radius:9px;background:#e5efde;color:var(--green);padding:18px;margin-top:24px;font-size:14px}.feedback.incorrect{background:#f5e3d9;color:#85412d}.score{text-align:center;padding:32px 0}.score .value{font:76px Georgia,serif;letter-spacing:-3px;color:var(--green)}.score p{margin:12px 0 25px}.feedback-list{display:grid;gap:10px;margin:20px 0}.feedback-row{display:flex;gap:15px;align-items:start;font-size:13px;border-bottom:1px solid var(--line);padding:12px 0}.feedback-row .correct{color:var(--green)}.feedback-row .incorrect{color:var(--rust)}.loading{padding:80px;text-align:center;color:var(--muted)}footer{margin-top:42px;display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:18px;color:var(--muted);font-size:10px;letter-spacing:.3px}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%) translateY(100px);max-width:min(520px,90vw);padding:14px 22px;background:var(--ink);color:var(--card);border-radius:9px;font-size:13px;z-index:100;opacity:0;transition:.2s;box-shadow:0 5px 25px #1235}#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}dialog{width:min(680px,calc(100vw - 30px));max-height:90vh;border:1px solid var(--line);border-radius:18px;padding:30px;background:var(--card);color:var(--ink)}dialog::backdrop{background:#15392fc0;backdrop-filter:blur(3px)}dialog h2{margin-bottom:20px}.dialog-head{display:flex;justify-content:space-between;align-items:start;gap:20px}.error{color:var(--rust)}.offline{background:var(--yellow);padding:10px 20px;text-align:center;font-size:12px}.hidden{display:none!important}@keyframes arrive{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@media(min-width:1500px){main{padding-top:55px}.hero{gap:80px}.hero-art{padding:40px}}
@media(max-width:1100px){.app{grid-template-columns:195px 1fr}.rail{padding:28px 16px}.topbar{padding:0 28px}main{padding:32px 28px}.hero{gap:20px}.hero h1{font-size:53px}.word-card{padding:26px 22px}.modes{grid-template-columns:repeat(2,1fr)}.grid-two{grid-template-columns:1fr}.mode{min-height:150px}.mode .mode-icon{margin-bottom:15px}}
@media(max-width:760px){.app{display:block}.rail{height:auto;position:relative;border-right:0;border-bottom:1px solid var(--line);padding:18px 20px 0;gap:17px}.brand{font-size:20px}.brand img{width:33px;height:33px}.rail nav{display:flex;overflow:auto;gap:5px;padding-bottom:12px}.nav-link{white-space:nowrap;padding:8px 12px;font-size:12px}.nav-number,.rail-bottom{display:none}.topbar{height:54px;padding:0 22px}.account{font-size:11px}.account .avatar{display:none}main{padding:27px 21px 40px}.hero{grid-template-columns:1fr;padding-top:0;gap:10px}.hero h1{font-size:57px;max-width:450px}.hero-copy>p{font-size:15px;margin-top:15px}.hero-art{max-width:430px;width:100%;margin:auto;padding:25px 16px 30px}.word-card .word{font-size:48px}.features{grid-template-columns:1fr;margin-top:15px}.feature{display:grid;grid-template-columns:28px 1fr;padding:16px 0;gap:0 15px}.feature b{margin:0}.feature p{grid-column:2;max-width:none;margin-top:4px}.feature+.feature{border-left:0;border-top:1px solid var(--line);padding:16px 0}.feature .number{grid-row:1/3}.page-head{align-items:start;flex-direction:column;gap:17px}.page-head h1{font-size:39px}.stats{gap:8px}.stat{padding:17px 13px;border-radius:12px}.stat strong{font-size:33px}.stat span{font-size:10px}.form-grid{grid-template-columns:1fr}.panel{padding:22px}.modes{gap:10px}.mode{padding:19px 15px}.mode strong{font-size:13px}.question-card{padding:25px 22px}.question-card .prompt{font-size:27px}.quiz-bottom{flex-direction:column;align-items:stretch}.quiz-bottom .btn{width:100%}.quiz-bottom .hint{text-align:center}.assignment-card{align-items:start;flex-direction:column}.assignment-card .btn{width:100%}.toolbar select{max-width:none}.toolbar .actions{width:100%}th,td{padding:12px}.table-wrap{margin:0 -3px}.table-definition{min-width:190px}.login-wrap .panel{padding:25px}.hero .actions .btn{padding:12px 16px}footer{gap:10px;flex-wrap:wrap}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media(max-width:760px){.hero-art:before{transform:none}}