.learning-picker{margin:40px 0 48px;padding:28px 0 32px;border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border)}
.learning-section-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;margin-bottom:24px}
.learning-section-heading .preview-label{margin-bottom:8px}.learning-section-heading h2,.problem-list-heading{font-size:24px;line-height:1.5;font-weight:650;letter-spacing:-.025em;margin:0 0 8px}
.learning-section-heading p{margin:0;color:var(--color-secondary);font-size:14px;line-height:1.8}.learning-section-heading>.text-link{flex:none;margin-top:27px}
.learning-task-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}
.learning-task-card{display:flex;flex-direction:column;min-width:0;padding:20px 18px;border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-bg)}
.learning-task-card:hover{background:var(--color-surface);border-color:var(--color-border-hover)}.learning-task-index{font:12px/1.5 var(--font-mono);color:var(--color-muted);margin-bottom:18px}
.learning-task-card h3{font-size:16px;line-height:1.6;font-weight:650;margin:0 0 8px;letter-spacing:-.015em}.learning-task-card p{font-size:13px;line-height:1.8;color:var(--color-secondary);margin:0 0 20px}
.learning-task-start{display:flex;align-items:center;gap:6px;color:var(--color-accent);font-size:12px;margin-top:auto}.learning-task-start svg,.learning-reference summary svg{width:15px;height:15px}
.problem-list-heading{font-size:20px;margin-bottom:24px}.learning-layout{display:grid;grid-template-columns:minmax(0,760px) 168px;gap:64px;margin-top:36px}.learning-body{min-width:0;font-size:15px;line-height:1.9}
.learning-body section{margin-bottom:40px}.learning-body h2{font-size:22px;font-weight:650;line-height:1.5;letter-spacing:-.02em;margin:0 0 16px}.learning-body h3{font-size:16px;font-weight:600;margin:24px 0 12px}.learning-body p{margin:0 0 16px;color:var(--color-secondary)}
.learning-step{position:relative}.learning-step-number{display:block;font:12px/1.5 var(--font-mono);color:var(--color-accent);margin-bottom:8px}.learning-constraint{padding:16px 20px;border-left:2px solid var(--color-accent);background:var(--color-surface);margin:20px 0}.learning-constraint strong{font-size:12px}.learning-constraint p{margin:6px 0 0;font-size:14px}
.learning-example{margin:24px 0}.learning-example figcaption{font-size:12px;color:var(--color-muted);margin-bottom:10px}.learning-observations,.learning-reference ol{padding-left:22px;margin:20px 0;color:var(--color-secondary);font-size:14px}.learning-observations li,.learning-reference li{padding-left:3px;margin-bottom:10px}
.learning-field{margin:22px 0 0}.learning-field label{display:block;font-size:14px;font-weight:600;line-height:1.6;margin-bottom:10px}.learning-field textarea{display:block;width:100%;padding:14px 16px;font:14px/1.8 var(--font-body);color:var(--color-text);background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius);resize:vertical;min-height:108px}.learning-field textarea::placeholder{color:var(--color-muted)}
.learning-body .learning-save-note,.learning-save-note{font-size:12px;line-height:1.8;color:var(--color-muted);margin-top:12px}
.learning-reference{margin-top:24px;border:1px solid var(--color-border);border-radius:var(--radius);overflow:hidden}.learning-reference summary{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 20px;font-size:14px;font-weight:600;cursor:pointer;list-style:none}.learning-reference summary::-webkit-details-marker{display:none}.learning-reference summary:hover{background:var(--color-surface)}.learning-reference[open] summary{border-bottom:1px solid var(--color-border)}.learning-reference[open] summary svg{transform:rotate(180deg)}.learning-reference-body{padding:0 20px 20px}.learning-reference-body .request-block p{font-size:14px}.learning-reference .learning-reference-note{font-size:12px;margin:16px 0 0;color:var(--color-muted)}
.learning-checklist{display:grid;gap:14px}.learning-checklist label{display:flex;align-items:flex-start;gap:12px;font-size:14px;line-height:1.8;color:var(--color-secondary);cursor:pointer}.learning-checklist input{flex:none;width:18px;height:18px;margin:4px 0 0;accent-color:var(--color-accent)}.learning-related .related-links{flex-wrap:wrap}.learning-body .text-link{display:inline-flex;align-items:center;gap:8px}
.skill-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.skill-layout{display:grid;grid-template-columns:minmax(0,680px) 280px;gap:64px;margin-top:44px}.skill-example{padding:24px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg)}.skill-example>span{display:block;font-size:11px;color:var(--color-accent);margin-bottom:8px;font-weight:600;letter-spacing:.05em}.skill-example p{font-size:14px;margin-bottom:24px}.skill-install{padding:24px;border:1px solid var(--color-border);border-radius:var(--radius-lg);align-self:start}.skill-install h2{font-size:16px;margin:0 0 16px}.skill-install ol{padding-left:20px;color:var(--color-secondary);font-size:13px;line-height:1.8;margin:0 0 20px}.skill-install li{margin:0 0 12px}.skill-install code{display:block;padding:10px 12px;background:var(--color-surface);border-radius:6px;color:var(--color-accent);font-size:13px}.skill-install p{font-size:12px;line-height:1.8;margin:16px 0 0;color:var(--color-muted)}
:is(.learning-picker,.learning-page,.skill-page) :is(a,button,input,textarea,summary):focus-visible{outline:2px solid var(--color-accent);outline-offset:3px}
@media(max-width:1100px){.learning-task-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.learning-layout,.skill-layout{gap:32px}}
@media(max-width:800px){.learning-layout,.skill-layout{grid-template-columns:minmax(0,1fr)}.learning-layout>.detail-toc{display:none}.learning-task-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.learning-section-heading{flex-direction:column;gap:12px}.learning-section-heading>.text-link{margin:0}.skill-install{max-width:none}}
@media(max-width:480px){.learning-picker{margin:28px 0 32px;padding:24px 0}.learning-section-heading h2{font-size:22px}.learning-task-grid{grid-template-columns:minmax(0,1fr);gap:12px}.learning-task-card{padding:18px 20px}.learning-task-index{margin-bottom:10px}.learning-task-card p{margin-bottom:14px}.learning-body h2{font-size:20px}.learning-body{font-size:14px}.learning-constraint{padding:14px 16px}.learning-field textarea{font-size:16px;padding:12px}.learning-reference summary{padding:14px 16px}.learning-reference-body{padding:0 16px 16px}.skill-example,.skill-install{padding:20px}.skill-layout{margin-top:32px}}