:root{--accent:#075496;--accent-dark:#073e73;--accent-soft:#eaf5fc;--cyan:#00a2df;--ink:#202d3a;--muted:#667282;--paper:#f5f6f8;--surface:#fff;--line:#e2e6ec;--success:#19674c;--danger:#a32e32;--radius:14px}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--paper);font:15px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}button,input,textarea,select{font:inherit}button,a,input,textarea,select,summary{outline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--accent)}.skip{position:fixed;top:-90px;left:20px;background:#fff;z-index:10;padding:12px}.skip:focus{top:10px}.topbar{height:82px;background:var(--surface);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:42px;padding:0 36px;position:relative;z-index:2}.brand{display:flex;align-items:center;gap:10px;font-size:25px;font-weight:760;letter-spacing:-1px;color:var(--ink)}.brand:hover{text-decoration:none}.brand-symbol{background:var(--accent);color:#fff;display:grid;place-items:center;width:39px;height:39px;border-radius:12px;font-size:26px}.top-caption{font-size:13px;color:var(--muted)}.account{margin-left:auto;display:flex;align-items:center;gap:22px;font-weight:600}.account small{display:block;color:var(--muted);font-size:11px;font-weight:400}.account form{margin:0}.shell{display:flex;min-height:calc(100vh - 82px)}.sidebar{width:244px;flex-shrink:0;background:var(--surface);border-right:1px solid var(--line);padding:35px 20px;display:flex;flex-direction:column}.nav-caption{font-size:10px;letter-spacing:1.8px;color:var(--muted);padding:0 14px;margin-bottom:20px}nav{display:flex;flex-direction:column;gap:7px}nav a{display:flex;align-items:center;gap:13px;padding:12px 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.15s}a.card:hover{text-decoration:none;border-color:#b4c1d0;box-shadow:0 4px 18px #23384f09}.badge{display:inline-block;font-size:10px;letter-spacing:.6px;padding:4px 8px;border-radius:5px;background:var(--accent-soft);color:var(--accent);font-weight:650}.course-card{border-top:3px solid var(--cyan);padding-top:24px}.course-card h2{margin-top:20px}.course-card h3{font-size:22px}.course-card p,.task-card p{color:var(--muted);font-size:13px}.text-link{display:block;font-size:12px;font-weight:650;margin-top:25px}.row-between,.card-bottom,.list-card,.rubric-row,.invite-row{display:flex;align-items:center;justify-content:space-between;gap:16px}.card-bottom{border-top:1px solid var(--line);padding-top:16px;font-size:11px;color:var(--muted);margin-top:24px}.card-bottom span{color:var(--accent)}.list-card{padding:20px 24px}.list-card h3{margin:0}.list-card p{margin:4px 0 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var(--line);font-size:13px}.rubric-row strong{white-space:nowrap}.score-pill{background:var(--accent-soft);color:var(--accent);border-radius:30px;padding:11px 20px;white-space:nowrap;font-weight:700}.meta-line{font-size:12px;color:var(--muted);margin-bottom:24px}.editor-heading{display:flex;align-items:center;justify-content:space-between;margin-top:20px}.code-editor,.code-preview{font:13px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace;tab-size:4}.code-editor{background:#172331!important;color:#e3eaf4!important;border-color:#172331!important;min-height:300px;padding:20px!important}.runner-toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin:16px 0}.output{min-height:75px;max-height:450px;overflow:auto;padding:18px;border:1px solid var(--line);border-radius:8px;font:12px/1.7 ui-monospace,monospace;background:#f8fafc;white-space:pre-wrap;overflow-wrap:anywhere}.plots img{display:block;max-width:100%;height:auto;margin:10px 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small{display:block;font-weight:400;font-size:10px}hr{border:0;border-top:1px solid var(--line);margin:28px 0}footer{border-top:1px solid var(--line);padding:24px 0;margin-top:50px;font-size:11px;color:var(--muted);display:flex;justify-content:space-between;gap:16px}.workspace{margin-top:28px}@media(min-width:1500px){main{padding-left:65px;padding-right:65px}}@media(max-width:1100px){.sidebar{width:206px;padding:30px 12px}main{padding:32px 26px 0}.topbar{padding:0 24px}.top-caption{display:none}.dashboard-grid{gap:20px;grid-template-columns:1fr 1fr}.card{padding:21px}.section-heading .small{display:none}}@media(max-width:760px){.topbar{height:70px;padding:0 18px;gap:12px}.brand{font-size:22px}.brand-symbol{width:32px;height:32px;font-size:23px;border-radius:9px}.account{gap:6px;font-size:12px}.account small{font-size:9px}.shell{display:block;min-height:calc(100vh - 70px)}.sidebar{width:100%;padding:7px 10px;border-right:0;border-bottom:1px solid var(--line)}.sidebar nav{flex-direction:row;overflow-x:auto;gap:2px}.sidebar nav a{white-space:nowrap;font-size:11px;padding:10px 12px}.sidebar nav a span{font-size:16px}.nav-caption,.sidebar-foot{display:none}main{padding:28px 18px 0}.page-heading{align-items:flex-start;flex-direction:column;gap:16px}.dashboard-grid{grid-template-columns:1fr;gap:18px}.card{padding:21px 18px;margin-bottom:17px}.empty{padding:30px 20px}.card h3{font-size:17px}.course-card h3{font-size:21px}.auth-main{padding:28px 20px 0!important;margin:0!important}.score-pill{padding:6px 14px;font-size:13px}.runner-toolbar .small{display:block;width:100%}.actions .button{flex:1}.auth-links{flex-wrap:wrap}.file-row{flex-wrap:wrap}.file-row label{margin:0}h1{letter-spacing:-.6px}footer{margin-top:30px;font-size:10px}.topbar .quiet{font-size:11px}.lesson-row{gap:12px}.list-card{gap:10px}.list-card>span{flex-shrink:0}}

.brand-logo{width:44px;height:44px;object-fit:contain}@media(max-width:760px){.brand-logo{width:36px;height:36px}}

.matching-row{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:18px;margin:14px 0}.matching-row label{margin:0}.matching-task{padding:18px 0;border-bottom:1px solid var(--line)}[hidden]{display:none!important}@media(max-width:760px){.matching-row{grid-template-columns:1fr;gap:8px}}
.pair-builder-row{display:grid;grid-template-columns:1fr 1fr auto;gap:12px;align-items:end;margin-bottom:15px}.pair-builder-row label{margin:0}.pair-builder-row input{margin-top:8px}.matching-builder{padding:22px;background:var(--accent-soft);border-radius:10px;margin:20px 0}@media(max-width:760px){.pair-builder-row{grid-template-columns:1fr}.pair-builder-row .quiet{justify-self:start}}
.saved-answers .rubric-row{align-items:flex-start}.saved-answers .rubric-row strong{white-space:normal;max-width:55%;text-align:right;font-weight:500}
.form-card form p:has(> #id_consent){display:flex;align-items:center;gap:10px}.form-card form p:has(> #id_consent)>label{order:1;margin:0}.form-card form p:has(> #id_consent)>input{order:0;flex:0 0 16px;width:16px;height:16px;margin:0}
.password-checklist{list-style:none;padding:0;margin:8px 0 18px}.password-checklist li{display:flex;align-items:flex-start;gap:9px;margin:7px 0;color:var(--muted)}.password-checklist .rule-mark{flex:0 0 17px;font-weight:800}.password-checklist li.passed{color:var(--success)}

.join-form>.button{margin-top:16px}

.daily-phrase{max-width:470px;line-height:1.5}

.headman-save{margin-top:16px}
@media(max-width:760px){input:not([type=checkbox]):not([type=file]),textarea,select{font-size:16px}.topbar .quiet{min-width:44px;min-height:44px}}
.skip:not(:focus){clip-path:inset(100%);width:1px;height:1px;overflow:hidden;padding:0;white-space:nowrap}