:root{color-scheme:light;--navy:#102c41;--navy2:#183d53;--ink:#172a35;--muted:#607480;--bg:#f3f6f7;--paper:#fff;--line:#dce5e9;--teal:#0a7973;--teal-soft:#e7f6f3;--gold:#efb95b;--warn:#a65812;--warn-bg:#fff5e8;--error:#a3323d;--error-bg:#fff0f1;--good:#176c52;--good-bg:#e8f5ed;--shadow:0 16px 55px rgba(16,44,65,.075)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input{font:inherit}button{cursor:pointer}button:disabled{opacity:.55;cursor:not-allowed}button:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid #60a9c9;outline-offset:3px}.shell{width:min(1120px,calc(100% - 40px));margin:0 auto}.topbar{background:var(--navy);color:#fff}.topbar-inner{height:76px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;gap:12px;align-items:center}.logo{display:grid;place-items:center;width:40px;height:40px;border:1px solid #507687;border-radius:12px;color:#f4c57b;font-weight:800;letter-spacing:-.8px;font-size:16px}.brand-name{font-weight:800;letter-spacing:.08em;font-size:13px}.brand-sub{font-size:12px;color:#b9ced4}.right-meta{font-size:12px;color:#c1d1d8;text-align:right}.welcome{padding:54px 0 60px}.welcome-layout{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(310px,.85fr);gap:30px;align-items:stretch}.hero{background:var(--navy);color:#fff;border-radius:24px;padding:47px 44px;position:relative;overflow:hidden;min-height:506px}.hero:after{content:"";position:absolute;border:1px solid rgba(255,255,255,.10);border-radius:50%;width:410px;height:410px;right:-220px;bottom:-210px}.eyebrow{color:#b7d9d5;text-transform:uppercase;font-size:11px;font-weight:800;letter-spacing:.2em}.hero h1{font-size:clamp(2rem,4vw,3.4rem);letter-spacing:-.052em;line-height:1.13;margin:20px 0}.hero h1 span{color:#ecc17b}.lead{max-width:500px;font-size:17px;color:#dce8e8;line-height:1.67}.hero-rule{width:48px;height:4px;border-radius:4px;background:#eabd77;margin:28px 0}.hero h2{font-size:15px;margin:0 0 14px}.steps{display:grid;gap:13px;font-size:14px;color:#dce8e8}.step{display:flex;gap:12px;align-items:flex-start}.step-num{flex:none;width:25px;height:25px;border:1px solid #809ca5;border-radius:50%;display:grid;place-items:center;font-size:12px;color:#fff}.form-card,.card{background:var(--paper);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}.form-card{padding:38px 32px}.form-card h2,.card h2{margin:0 0 8px;letter-spacing:-.02em}.subtle{color:var(--muted)}.small{font-size:13px}.form-card p{margin:0 0 24px}.field{display:grid;gap:7px;margin:15px 0}.field label{font-size:13px;font-weight:750}.text-input{border:1px solid #b9ccd4;border-radius:10px;padding:11px 13px;min-height:44px;width:100%;background:#fff;color:var(--ink)}.text-input:focus{border-color:var(--teal)}.btn{display:inline-flex;justify-content:center;align-items:center;gap:8px;border-radius:10px;min-height:43px;padding:9px 16px;font-weight:750;font-size:14px;border:1px solid transparent;transition:background .15s,transform .15s}.btn:hover:not(:disabled){transform:translateY(-1px)}.primary{background:var(--teal);color:white}.primary:hover{background:#08635d}.secondary{background:#fff;color:var(--navy);border-color:#c5d6dd}.secondary:hover{background:#eef5f7}.outline{background:transparent;color:#fff;border-color:#7994a4}.text-btn{background:none;border:0;color:var(--teal);font-size:13px;font-weight:700;padding:6px 0}.wide{width:100%}.privacy{border-top:1px solid var(--line);padding-top:17px;margin-top:24px;color:#637985;font-size:12px}.saved-card{border:1px solid #c4e6de;background:var(--teal-soft);border-radius:12px;padding:14px;margin:0 0 20px}.saved-card .btn{margin-top:10px}.main{padding:26px 0 64px}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:18px}.userline{display:flex;align-items:center;gap:9px;flex-wrap:wrap}.userline strong{font-size:14px}.chip{font-size:12px;border:1px solid var(--line);color:var(--muted);border-radius:100px;padding:5px 10px;background:#fff}.chip.finished{background:var(--good-bg);color:var(--good);border-color:#bfdfd0}.saved-indicator{font-size:12px;color:var(--teal)}.lab-layout{display:grid;grid-template-columns:232px minmax(0,1fr);gap:21px;align-items:start}.sidebar{background:#fff;padding:17px;border:1px solid var(--line);border-radius:17px;position:sticky;top:14px}.side-eyebrow{text-transform:uppercase;font-size:11px;font-weight:800;letter-spacing:.13em;color:#6a7f88;margin:5px 9px 12px}.nav-btn{width:100%;text-align:left;background:none;border:1px solid transparent;border-radius:10px;padding:11px 10px;margin:2px 0;display:flex;gap:10px;align-items:center;color:#314954;font-size:14px;font-weight:650}.nav-btn.active{background:var(--teal-soft);color:#096b65;border-color:#bde6de}.nav-btn:not(.active):hover{background:#f3f7f7}.nav-n{font-weight:800;display:grid;place-items:center;width:24px;height:24px;flex:none;border-radius:8px;background:#eaf0f2;font-size:12px}.nav-btn.active .nav-n{background:#bce2d9}.progress-label{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-top:21px}.meter{height:8px;border-radius:40px;background:#e8f0f1;overflow:hidden;margin-top:9px}.meter>div{height:100%;background:var(--teal);border-radius:40px;transition:width .2s}.side-note{font-size:12px;color:#738792;margin:16px 3px 2px;line-height:1.55}.workarea{min-width:0}.section-head{background:var(--navy);border-radius:17px;color:#fff;padding:26px 28px;margin-bottom:18px}.section-head .eyebrow{font-size:10px}.section-head h1{margin:7px 0 5px;font-size:clamp(22px,3vw,28px);letter-spacing:-.035em}.section-head p{color:#c4d9dd;font-size:14px;margin:0}.qcard{background:#fff;border-radius:16px;border:1px solid var(--line);padding:23px 25px;margin-bottom:14px}.qheader{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:12px}.qnum{color:var(--teal);font-size:12px;font-weight:850;letter-spacing:.08em;text-transform:uppercase}.status{font-size:12px;font-weight:750;border-radius:999px;padding:4px 10px;background:#f2f5f6;color:#647984;white-space:nowrap}.status.correct{background:var(--good-bg);color:var(--good)}.status.incorrect{background:var(--error-bg);color:var(--error)}.status.review{background:var(--warn-bg);color:var(--warn)}.status.ready{background:#e8f2f8;color:#315c75}.qprompt{font-size:16px;font-weight:720;line-height:1.55;margin:0 0 15px}.qprompt.inline{font-weight:600}.choices{display:grid;gap:8px}.choice{border:1px solid #d6e2e6;background:#fff;border-radius:11px;padding:10px 12px;display:flex;align-items:flex-start;gap:12px;cursor:pointer;font-size:14px}.choice:hover{border-color:#a4c8c4;background:#fafefe}.choice.selected{background:#edf8f5;border-color:#6baba1}.choice input{margin-top:4px;accent-color:var(--teal);flex:none}.letter{font-weight:850;color:#6c848b}.qfoot{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:17px}.feedback{padding:12px 14px;border-radius:10px;font-size:13px;line-height:1.5;margin-top:13px}.feedback.correct{color:var(--good);background:var(--good-bg)}.feedback.incorrect{color:var(--error);background:var(--error-bg)}.feedback.review{color:var(--warn);background:var(--warn-bg)}.feedback.incomplete{color:#637782;background:#eef3f5}.words{display:flex;flex-wrap:wrap;gap:8px;border:1px dashed #bdd0d5;border-radius:12px;padding:13px;min-height:60px;margin:11px 0}.word-btn{font-weight:650;background:#e8f1f3;border:1px solid #cfdee2;border-radius:9px;padding:8px 11px;color:#25424c;min-height:39px}.word-btn:hover{background:#dbeaec}.word-btn:disabled{opacity:.3}.answer-track{min-height:51px;padding:10px;border-radius:11px;background:#f6f9fa;border:1px solid #dbe5e8;display:flex;flex-wrap:wrap;gap:7px;align-items:center}.answer-track .word-btn{background:#d8eee8;border-color:#9fccc0}.hintnote{font-size:12px;color:var(--muted);margin:7px 0}.nav-footer{background:#fff;border:1px solid var(--line);border-radius:14px;padding:15px 18px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:17px}.summary-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:0 0 16px}.stat{padding:17px;background:#fff;border:1px solid var(--line);border-radius:13px}.stat strong{font-size:29px;display:block;line-height:1.15;color:var(--navy)}.stat span{font-size:12px;color:var(--muted)}.review-list{display:grid;gap:8px}.review-row{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 13px;border:1px solid var(--line);background:#fff;border-radius:10px;font-size:13px}.review-row .btn{padding:5px 9px;min-height:32px;font-size:12px}.section-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.notice{background:#eef6f7;border:1px solid #cfdee1;border-radius:12px;padding:13px 15px;color:#37515b;font-size:13px;margin:16px 0}.end-banner{background:var(--good-bg);border:1px solid #c4dfd1;padding:18px;border-radius:13px;color:#17684f;margin-bottom:16px}.end-banner strong{display:block;font-size:18px}.footnote{font-size:12px;color:#78909a;margin-top:17px}.noscript{padding:30px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:850px){.welcome-layout{grid-template-columns:1fr}.hero{min-height:auto}.lab-layout{grid-template-columns:1fr}.sidebar{position:static;display:flex;flex-wrap:wrap;gap:7px}.sidebar .side-eyebrow,.sidebar .side-note{display:none}.nav-btn{flex:1 1 180px}.progress-label,.meter{flex:1 1 100%}.main{padding-top:18px}}
@media(max-width:570px){.shell{width:min(100% - 22px,1120px)}.topbar-inner{height:66px}.right-meta{display:none}.welcome{padding:16px 0 30px}.hero{padding:29px 25px;border-radius:18px}.hero h1{font-size:2.3rem}.form-card{padding:25px 22px}.section-head{padding:22px 19px}.qcard{padding:18px 16px}.summary-grid{gap:7px}.stat{padding:11px}.stat strong{font-size:23px}.nav-footer .btn{flex:1}.sidebar{padding:10px}.nav-btn{flex:1 1 130px;padding:8px;font-size:12px}.qprompt{font-size:15px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}