:root{--bg:#f2f5f8;--surface:#fff;--ink:#192f43;--muted:#657689;--line:#dce5ec;--brand:#14796e;--brand-soft:#e7f4ef;--nav:#142d40;--good:#107443;--good-bg:#e8f5ec;--bad:#b8373b;--bad-bg:#fff0ef;--warn:#835716;--warn-bg:#fff6df;--shadow:0 8px 28px #142d4008;--radius:19px;--font:19px}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}button,input,select,textarea{font:inherit}button,a,select,input{touch-action:manipulation}button{border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);padding:10px 16px;cursor:pointer;transition:background .15s,border-color .15s}button:hover{border-color:var(--brand);background:var(--brand-soft)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #6db7e6;outline-offset:3px}button:disabled{opacity:.5;cursor:not-allowed}button.primary,.button.primary{background:var(--brand);color:#fff;border-color:var(--brand);font-weight:650}button.primary:hover{filter:brightness(.93)}button.quiet{background:transparent;border-color:transparent;color:var(--muted)}button.danger{color:var(--bad)}a{color:var(--brand);text-underline-offset:3px}.button{display:inline-block;text-decoration:none;border:1px solid var(--line);border-radius:10px;padding:10px 16px}h1,h2,h3,p{margin-top:0}h1{font-size:31px;letter-spacing:-.6px;line-height:1.35}h2{font-size:23px;line-height:1.4}h3{font-size:18px;margin-bottom:12px}small,.muted{color:var(--muted)}small{font-size:13px}.shell{min-height:100vh}.sidebar{width:242px;position:fixed;inset:0 auto 0 0;padding:31px 21px;background:var(--nav);color:#edf6f8;display:flex;flex-direction:column;z-index:20}.logo{font-size:26px;font-weight:750;letter-spacing:1px;display:flex;gap:11px;align-items:center}.logo img{width:36px;height:36px}.logo small{display:block;font-size:11px;letter-spacing:1px;color:#a9bdc8;font-weight:500}.side-badge{display:inline-flex;align-items:center;gap:8px;font-size:12px;color:#bce0d2;border:1px solid #3a5360;padding:5px 10px;border-radius:30px;margin:27px 0;align-self:flex-start}.dot{width:6px;height:6px;border-radius:100%;background:#95d3b9}.nav{display:grid;gap:7px}.nav button{text-align:left;border:0;background:transparent;color:#bdcbd4;padding:12px 15px;display:flex;gap:12px;align-items:center}.nav button.active,.nav button:hover{background:#284557;color:white}.nav-icon{font-size:18px;min-width:19px;text-align:center}.sidefoot{margin-top:auto;font-size:12px;color:#a4b7c4;padding:27px 9px 0}.sidefoot p{margin:0 0 9px}.sidefoot button{font-size:12px;padding:5px 10px;background:transparent;color:#d4e2e7;border-color:#3c5768}.main{margin-left:242px;padding:31px 39px 55px;max-width:1590px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:26px}.eyebrow{font-size:11px;font-weight:750;letter-spacing:1.8px;color:var(--brand);text-transform:uppercase}.topbar .right{display:flex;gap:10px;align-items:center}.today{font-size:13px;color:var(--muted)}.account-name{font-size:13px}.mobilebrand,.menu-button{display:none}.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);margin-bottom:19px}.hero{background:var(--nav);color:#fff;padding:33px 36px;position:relative;overflow:hidden}.hero p{color:#c2d3db;max-width:710px;margin-bottom:23px}.hero .eyebrow{color:#a9d8c7}.hero h1{margin:12px 0 15px;font-size:34px}.hero button,.hero .button{border-color:#557c89;background:#23485a;color:#fff}.hero button.primary,.hero .button.primary{background:#c8e8db;color:#123c33;border-color:#c8e8db}.hero-content{position:relative;z-index:1}.hero-art{position:absolute;right:-55px;top:-115px;width:380px;height:380px;border:1px solid #accfc422;border-radius:50%;pointer-events:none;box-shadow:0 0 0 52px #accfc411,0 0 0 105px #accfc408}.hero-meta{display:flex;gap:22px;font-size:12px;color:#a8c5ce;margin-top:23px}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.spread{justify-content:space-between}.grid{display:grid;gap:17px}.stats{grid-template-columns:repeat(4,1fr);margin:21px 0}.stat{padding:19px 21px;border:1px solid var(--line);border-radius:15px;background:var(--surface)}.stat b{font-size:29px;display:block;line-height:1.3}.stat span{font-size:12px;color:var(--muted)}.twocol{grid-template-columns:1.35fr 1fr}.cards{grid-template-columns:repeat(3,1fr)}.paper-grid{grid-template-columns:repeat(5,1fr)}.paper-card{text-align:left;padding:18px 16px;border-radius:15px;position:relative;min-height:135px}.paper-card.active{border:2px solid var(--brand);padding:17px 15px;background:var(--brand-soft)}.paper-card strong{display:block;margin:8px 0 6px;font-size:16px}.paper-card small{display:block;font-size:11px}.paper-number{font-size:11px;color:var(--brand);font-weight:750;letter-spacing:1px}.actioncard{text-align:left;padding:21px;border-radius:15px}.actioncard strong{display:block;font-size:18px;margin:0 0 7px}.actioncard small{display:block;font-size:13px;line-height:1.6}.card-icon{color:var(--brand);font-size:23px;display:block;margin-bottom:10px}.tag,.pill{display:inline-block;padding:3px 9px;background:var(--bg);border:1px solid var(--line);border-radius:7px;font-size:12px;color:var(--muted);margin:0 5px 5px 0}.tag.green{background:var(--brand-soft);border-color:#cce2da;color:var(--brand)}.tag.warn{background:var(--warn-bg);color:var(--warn);border-color:#ebd6a7}.tag.bad{background:var(--bad-bg);color:var(--bad)}.callout{border-left:4px solid var(--brand);padding:13px 17px;background:var(--brand-soft);border-radius:8px;font-size:14px;margin:15px 0;white-space:pre-wrap;word-break:break-word}.callout.warn{background:var(--warn-bg);border-color:#d6a549;color:var(--warn)}.callout.bad{background:var(--bad-bg);border-color:var(--bad);color:var(--bad)}.callout.good{background:var(--good-bg);border-color:var(--good);color:var(--good)}.filters{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:13px;margin:18px 0}label{display:block;font-size:13px;font-weight:600;color:var(--muted)}label select,label input,label textarea{display:block;margin-top:6px;width:100%}input,select,textarea{border:1px solid var(--line);border-radius:9px;background:var(--surface);color:var(--ink);padding:10px 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18px;background:var(--good-bg);opacity:1}.option.incorrect{border:2px solid var(--bad);padding:15px 18px;background:var(--bad-bg);opacity:1}.option.neutral{opacity:.7}.result{padding:20px 23px;border:1px solid var(--line);border-radius:13px;margin-top:23px;background:var(--bg)}.result h3{font-size:20px}.result.good{background:var(--good-bg);border-color:#b5dbc1}.result.bad{background:var(--bad-bg);border-color:#efc9c2}.result.warn{background:var(--warn-bg);border-color:#e5d0a4}.explanation{font-size:17px;line-height:1.85;white-space:pre-wrap;word-break:break-word}.explanation small{font-size:12px}.explainsection{border-top:1px solid var(--line);margin-top:18px;padding-top:18px}.explainsection h3{font-size:16px;color:var(--brand)}.answerfooter{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:24px}.answerfooter button{min-width:100px}.sourceLine{font-size:12px;color:var(--muted);margin:13px 0}.englishControl{font-size:12px}.list{display:grid;gap:9px}.qitem{text-align:left;padding:13px 16px;display:flex;gap:12px;align-items:flex-start;border-radius:11px;width:100%}.qitem .title{font-weight:550;line-height:1.6;word-break:break-word}.qitem .meta{display:block;font-size:11px;color:var(--muted);margin:4px 0 0}.badge{flex-shrink:0;min-width:30px;width:30px;height:30px;text-align:center;border-radius:7px;background:var(--bg);font-size:13px;line-height:30px}.badge.good{color:var(--good);background:var(--good-bg)}.badge.bad{color:var(--bad);background:var(--bad-bg)}.empty{text-align:center;padding:43px 20px;color:var(--muted)}table{border-collapse:collapse;width:100%;font-size:13px}th,td{text-align:left;border-bottom:1px solid var(--line);padding:12px 10px;vertical-align:top}th{color:var(--muted);font-weight:600;background:var(--bg)}.tablewrap{overflow:auto}.narrow{max-width:850px}.check{font-weight:400;display:flex;align-items:center;margin:13px 0;gap:5px;color:var(--ink)}.kbd{font-size:11px;border:1px solid var(--line);padding:1px 5px;border-radius:4px;display:inline-block}.sticky-actions{position:sticky;bottom:12px;background:var(--surface);box-shadow:0 6px 22px #102c4420;padding:13px;border:1px solid var(--line);border-radius:14px;margin-top:22px;z-index:5}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);max-width:90vw;background:var(--nav);color:white;padding:12px 21px;border-radius:11px;font-size:14px;z-index:80;box-shadow:var(--shadow)}dialog{border:1px solid var(--line);border-radius:18px;background:var(--surface);color:var(--ink);padding:27px;width:min(94vw,980px);max-height:90vh;overflow:auto}dialog::backdrop{background:#10273599}.modalclose{float:right;margin-left:15px;padding:6px 11px}.hidden{display:none!important}.numbers{font-variant-numeric:tabular-nums}.examgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(44px,1fr));gap:8px;margin:14px 0}.examgrid button{padding:8px 3px;font-size:13px}.examgrid button.answered{background:var(--brand-soft);border-color:var(--brand)}.examgrid button.now{outline:2px solid var(--brand);outline-offset:2px}.examgrid button.good{background:var(--good-bg);border-color:var(--good)}.examgrid button.bad{background:var(--bad-bg);border-color:var(--bad)}.noteBox{margin-top:22px}.note{border:1px solid var(--line);border-radius:12px;padding:15px 17px;margin:12px 0}.note-body{white-space:pre-wrap;word-break:break-word;margin:9px 0}.loader{margin:9vh auto;max-width:500px;text-align:center;padding:35px}.spinner{width:31px;height:31px;border:3px solid var(--line);border-top-color:var(--brand);border-radius:50%;animation:spin .8s linear infinite;display:inline-block}.form-error{color:var(--bad);font-size:14px;white-space:pre-wrap;min-height:0}.form-error:not(:empty){padding:11px 0}.form-grid{display:grid;gap:16px}.auth-panel{max-width:465px;margin:30px auto}.auth-panel h1{font-size:27px}.auth-panel .primary{width:100%;margin-top:5px}.auth-switch{font-size:14px;text-align:center;margin:20px 0 0}.admin-tabs{margin:0 0 22px;gap:8px}.admin-tabs button.active{background:var(--brand-soft);border-color:var(--brand);color:var(--brand)}.prewrap{white-space:pre-wrap;word-break:break-word}.skip{position:fixed;top:-70px;left:16px;padding:10px 20px;background:var(--surface);z-index:99}.skip:focus{top:10px}.landing{max-width:1240px;margin:auto;padding:0 34px 55px}.public-header{display:flex;justify-content:space-between;align-items:center;padding:25px 0 27px}.public-header .logo{color:var(--ink);font-size:22px}.public-header .logo small{color:var(--muted)}.landing-hero{padding:63px 48px;min-height:390px}.landing-hero h1{font-size:45px;line-height:1.4;max-width:710px}.landing-hero p{font-size:17px;max-width:580px}.landing-hero .hero-art{width:500px;height:500px;top:20px;right:-190px}.landing-features{margin:22px 0}.landing-feature{padding:26px}.landing-feature .card-icon{font-size:27px;margin-bottom:15px}.landing-feature p{font-size:14px;color:var(--muted);margin-bottom:0}.landing-bottom{display:flex;justify-content:space-between;align-items:center;gap:30px}.landing-footer{color:var(--muted);font-size:12px;margin-top:30px;display:flex;justify-content:space-between;gap:15px}.paper-switch{display:flex;gap:10px;align-items:center}.paper-switch select{font-size:13px;padding:7px 10px;max-width:210px}.overview-actions{margin-top:16px}.mobile-overlay{display:none}.inline-code{font-size:14px;padding:8px 12px;background:var(--bg);border:1px solid var(--line);border-radius:8px;overflow-wrap:anywhere}.chartbar{height:8px;background:var(--line);border-radius:6px;min-width:90px}.chartbar i{display:block;height:100%;background:var(--brand);border-radius:6px}.auth-helper{font-size:12px;color:var(--muted);margin-bottom:0}.actionlabel{font-size:11px;font-weight:700;letter-spacing:1px;color:var(--brand);margin-bottom:10px}.note-actions button{padding:4px 9px;font-size:12px}.dangerbox{border-color:var(--bad)}
body.dark{--bg:#111d28;--surface:#192936;--ink:#e2ebf2;--muted:#a5b5c2;--line:#344652;--brand:#82ceb4;--brand-soft:#243e39;--nav:#0c1b28;--good:#80dba1;--good-bg:#183d2c;--bad:#ffaca7;--bad-bg:#472b2b;--warn:#eed398;--warn-bg:#41391f}body.dark button.primary,body.dark .button.primary{color:#0e2b25}body.dark .hero button.primary{color:#123c33}
@keyframes spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}@media(max-width:1150px){.main{padding:25px 25px 50px}.twocol{grid-template-columns:1fr}.cards{grid-template-columns:repeat(2,1fr)}.sidebar{width:214px;padding:26px 15px}.main{margin-left:214px}.paper-grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:760px){body{font-size:15px}.sidebar{transform:translateX(-100%);transition:transform .2s;width:252px;padding:27px 20px}.sidebar.open{transform:translateX(0)}.mobile-overlay.active{display:block;position:fixed;inset:0;background:#0c1b2899;z-index:19}.main{margin-left:0;padding:17px 13px 35px}.mobilebrand{display:block;font-weight:750}.menu-button{display:block;font-size:21px;padding:3px 10px;background:transparent;border-color:transparent}.topbar{margin-bottom:18px}.topbar>.row{gap:8px}.topbar .eyebrow{display:none}.today,.account-name{display:none}.panel{padding:20px 17px;border-radius:15px}.hero{padding:25px 22px}.hero h1{font-size:27px}.hero p{font-size:14px}.stats{grid-template-columns:repeat(2,1fr);gap:10px;margin:14px 0}.stat{padding:15px 17px}.stat b{font-size:28px}.cards{grid-template-columns:repeat(2,1fr);gap:10px}.actioncard{padding:17px 13px}.actioncard strong{font-size:16px}.filters{grid-template-columns:1fr 1fr;gap:10px}.filters label:first-child{grid-column:span 2}.question{line-height:1.8}.option{font-size:calc(var(--font) - 1px);padding:13px 12px;gap:11px}.option.selected,.option.correct,.option.incorrect{padding:12px 11px}.option .letter{flex-basis:27px;height:27px}.answerfooter{gap:8px}.answerfooter button{min-width:75px;padding:10px 12px}.result{padding:17px 14px}.explanation{font-size:16px}.tag{font-size:11px}.panel h2{font-size:21px}.qitem{padding:12px 11px}.topbar .right button{font-size:12px;padding:6px 9px}.sticky-actions{bottom:8px}.paper-grid{grid-template-columns:repeat(2,1fr);gap:10px}.paper-card{min-height:122px}.paper-switch select{max-width:170px;font-size:12px}.landing{padding:0 16px 35px}.public-header{padding:18px 0}.public-header .logo{font-size:18px;gap:7px}.public-header .logo img{width:31px;height:31px}.public-header .logo small{font-size:9px}.public-header .row{gap:5px}.public-header button{padding:7px 10px;font-size:13px}.landing-hero{padding:35px 25px;min-height:auto}.landing-hero h1{font-size:31px}.landing-hero p{font-size:15px}.hero-meta{gap:14px;flex-wrap:wrap}.landing-features{grid-template-columns:1fr}.landing-feature{padding:22px}.landing-bottom{display:block}.landing-footer{display:block}.auth-panel{margin:20px auto}.admin-tabs{gap:5px}.admin-tabs button{font-size:13px;padding:7px 10px}.questionTop .row{gap:7px}.questionTop button{font-size:13px;padding:7px 10px}.hero-art{opacity:.5}.admin-tools{align-items:stretch}}

.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}