.learning{min-height:100vh;display:flex;flex-direction:column}
.learning-header{border-bottom:1px solid var(--line);padding:16px 0;background:var(--bg)}
.learning-header>.container{display:flex;align-items:center;justify-content:space-between;gap:24px}
.learning-header img{width:158px;height:60px;object-fit:cover}
.learning-header nav{display:flex;align-items:center;gap:24px;flex-wrap:wrap;font-size:14px}
.learning-header nav a,.learning-header button{min-height:44px;display:inline-flex;align-items:center}
.learning-header button{font:inherit;color:var(--ink);background:none;border:0;padding:0;cursor:pointer}
.learning-main{width:100%;padding-top:64px;padding-bottom:96px;flex:1}
.learning-main h1{font-size:clamp(36px,5vw,64px);max-width:20ch;margin:16px 0 24px}
.learning-lead{font-size:18px;max-width:62ch;color:var(--ink-soft);line-height:1.75}
.learning-intro{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:center;margin-bottom:64px}
.learning-intro figure{margin:0}
.learning-intro img{width:100%;height:auto;border-radius:var(--radius)}
.learning-intro figcaption{font-size:12px;line-height:1.7;color:var(--ink-soft);margin-top:12px}
.learning-intro .learning-back{margin-left:16px}
.learning-actions{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin:24px 0}
.learning-outline{list-style:none;margin:24px 0;padding:0}
.learning-outline li{display:grid;grid-template-columns:32px 1fr auto;gap:16px;padding:16px 0;border-top:1px solid var(--line);align-items:center}
.learning-outline a{font-weight:500;min-height:44px;display:flex;align-items:center}
.learning-outline small{color:var(--ink-soft);font-size:12px}
.learning-material-list{padding-left:24px;line-height:1.85}
.learning-selfcheck{border-top:1px solid var(--line);padding:16px 0}
.learning-selfcheck summary{cursor:pointer;min-height:44px;font-weight:600;line-height:1.6}
.learning-selfcheck p{margin:16px 0 0}
.learning-worksheet{max-width:900px}
.learning-worksheet section{margin:32px 0;break-inside:avoid}
.learning-worksheet h2{font-size:28px;margin-bottom:16px}
.learning-write-space{border:1px solid var(--line);min-height:100px;margin:12px 0 24px;padding:12px;font-size:13px;color:var(--ink-soft)}
.learning-worksheet textarea{width:100%;min-height:100px;font:inherit;border:1px solid var(--line);padding:12px;color:var(--ink);background:transparent}
.learning-worksheet label{display:block;line-height:1.7}
.learning-form{max-width:520px;margin-top:32px}
.learning-form label{display:block;font-weight:600;font-size:14px;margin-bottom:8px}
.learning-form input,.learning-form textarea,.learning-form select{width:100%;min-height:48px;border:1px solid var(--stone);border-radius:var(--radius);padding:12px 16px;background:var(--bg);color:var(--ink);font:inherit}
.learning-field{margin-bottom:24px}
.learning-form .btn{min-height:48px}
.learning-help{font-size:13px;line-height:1.7;color:var(--ink-soft);margin-top:16px;max-width:65ch}
.learning-help a{text-decoration:underline;text-underline-offset:3px}
.learning-notice{padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:24px 0;max-width:72ch}
.learning-error{color:var(--danger);font-weight:500}
.learning-list{list-style:none;padding:0;margin:40px 0;max-width:960px}
.learning-list>li{border-top:1px solid var(--line);padding:24px 0;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:center}
.learning-list>li:last-child{border-bottom:1px solid var(--line)}
.learning-list h2,.learning-list h3{font-size:28px;line-height:1.2;margin-bottom:12px}
.learning-list p{margin:0;max-width:64ch;color:var(--ink-soft)}
.learning-progress{font-size:13px;margin-bottom:12px!important;color:var(--teal-deep)!important}
.learning-article{max-width:760px}
.learning-article section{margin:40px 0}
.learning-article h2{font-size:clamp(24px,3vw,36px);margin-bottom:16px}
.learning-article p{font-size:17px;line-height:1.85}
.learning-back{display:inline-flex;min-height:44px;align-items:center;text-decoration:underline;text-underline-offset:4px}
.learning-controls{border-top:1px solid var(--line);padding-top:24px;margin-top:40px}
.learning-controls label{display:flex;align-items:center;gap:12px;min-height:44px;font-size:14px}
.learning-controls input[type=checkbox]{width:20px;height:20px}
.learning-controls input[type=range]{width:100%;height:44px;accent-color:var(--teal-deep)}
.learning-controls .btn{margin-top:16px;min-height:44px}
.learning-footer{padding:32px 0;background:var(--bg-deep);color:var(--ink);border-top:1px solid var(--line)}
.learning-footer::before{content:none}
.learning-footer .container{display:flex;gap:24px;flex-wrap:wrap}
.learning-footer a{min-height:44px;display:inline-flex;align-items:center;font-size:13px}
.learning :is(a,button,input,textarea,select):focus-visible{outline:2px solid var(--teal);outline-offset:4px}
.learning-skip{position:absolute;left:16px;top:-100px;padding:12px;background:var(--bg);z-index:100}
.learning-skip:focus{top:8px}
@media(max-width:680px){
  .learning-intro{grid-template-columns:1fr;gap:32px;margin-bottom:40px}
  .learning-intro figure{max-width:420px}
  .learning-intro .learning-back{margin-left:0;display:flex}
  .learning-outline li{grid-template-columns:24px 1fr;gap:12px}
  .learning-outline small{grid-column:2}
  .learning-header>.container{align-items:flex-start;gap:16px}
  .learning-header img{width:116px;height:48px}
  .learning-header nav{gap:4px 16px;justify-content:flex-end;font-size:12px}
  .learning-main{padding-top:40px;padding-bottom:56px}
  .learning-lead{font-size:16px}
  .learning-list>li{grid-template-columns:1fr;gap:16px}
  .learning-list .btn{justify-self:start}
  .learning-article p{font-size:16px}
}
@media print{
  .learning-header,.learning-footer,.learning-skip,.learning-print-actions,.learning-worksheet textarea{display:none!important}
  .learning-main{padding:0;max-width:none}
  .learning-main h1{font-size:28pt;max-width:none}
  .learning-notice{font-size:10pt}
  .learning-worksheet{max-width:none}
  .learning-worksheet h2{font-size:17pt}
  .learning-write-space{border-color:#999;min-height:90px}
}