button,input,select,textarea{font:inherit}button,select{color:var(--ink)}button{cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--red);outline-offset:4px}.nav-learn{position:relative;display:flex;align-items:center}.learn-trigger{border:0;background:none;font-size:14px;padding:0;min-height:44px;display:flex;align-items:center;gap:7px}.learn-trigger:hover,.learn-trigger[aria-expanded=true]{color:var(--red)}.learn-trigger span{font-size:18px}.learn-menu{position:absolute;z-index:20;right:0;top:100%;width:230px;background:var(--surface);border:1px solid var(--line);box-shadow:0 10px 22px #443c301c;padding:8px 16px}.learn-menu[hidden]{display:none}.site-header .learn-menu a{display:flex;justify-content:space-between;gap:12px;min-height:55px;white-space:nowrap;font-size:16px}.learn-menu small{color:var(--muted);font-size:12px}.legacy-anchor{display:block;scroll-margin-top:24px}.learning-portals{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);background:var(--surface)}.learning-portal{display:flex;flex-direction:column;padding:30px;text-decoration:none;gap:13px}.learning-portal+.learning-portal{border-left:1px solid var(--line)}.portal-meta{font-size:12px;letter-spacing:1px;color:var(--red)}.learning-portal h3{font:1.8rem var(--serif);margin:0}.learning-portal p{line-height:1.8;font-size:16px;color:var(--muted);margin:0}.portal-action{font-size:14px;color:var(--red);margin-top:auto;padding-top:12px}.learning-portal:hover{background:#e7d8bb}.study-main{max-width:1040px}.study-heading{display:flex;justify-content:space-between;gap:24px;align-items:center;padding:48px 0 32px}.study-heading h1{font:3rem/1.3 var(--serif);letter-spacing:4px;margin:0 0 16px}.study-heading>div>p:last-child{line-height:1.8;color:var(--muted);margin:0;font-size:16px}.subject-stamp{border:1px solid var(--red);color:var(--red);font:2rem var(--serif);padding:16px;flex:none}.daily-toolbar,.knowledge-toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 0;border-block:1px solid var(--line);margin-bottom:28px}.daily-toolbar>div{display:flex;align-items:center;gap:18px;flex-wrap:wrap}.daily-toolbar span{font-size:14px;color:var(--red)}.daily-toolbar strong{font:1.35rem var(--serif)}.daily-toolbar label{font-size:14px;display:flex;gap:12px;align-items:center}.daily-toolbar select{min-height:44px;background:var(--surface);border:1px solid var(--line);padding:8px 12px;max-width:190px}.lesson-notice:empty{display:none}.lesson-notice{margin:0 0 24px;line-height:1.8;font-size:14px;color:var(--muted)}.lesson-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin:0 0 24px}.lesson-heading h2{font:1.8rem/1.5 var(--serif);margin:0 0 8px}.lesson-heading p{color:var(--muted);font-size:14px;line-height:1.8;margin:0}.lesson-heading>span{font-size:14px;white-space:nowrap;color:var(--red);padding-top:8px}.quiz-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.quiz-card{min-width:0;border:1px solid var(--line);background:var(--surface);padding:25px;margin:0}.quiz-card legend{font-size:14px;color:var(--red);padding:0 6px}.quiz-context{font-size:16px;line-height:1.85;border-left:2px solid #b9a27c;padding-left:14px;margin:0 0 20px;white-space:pre-line}.quiz-question{font-size:16px;font-weight:600;line-height:1.7;margin:0 0 14px}.quiz-options{display:grid;gap:10px}.quiz-option{display:flex;align-items:flex-start;gap:10px;border:1px solid #cbb99a;padding:11px 12px;line-height:1.6;font-size:16px;cursor:pointer;min-height:46px}.quiz-option:has(input:checked){border-color:var(--red);background:#e6d3b2}.quiz-option input{margin:6px 0 0;accent-color:var(--red);flex:none}.quiz-option.correct{border-color:#62714d;background:#e1e3c9}.quiz-option.incorrect{border-color:var(--red);background:#ead0ba}.answer-note{line-height:1.85;font-size:16px;border-top:1px solid var(--line);margin:18px 0 0;padding-top:16px}.answer-note[hidden]{display:none}.quiz-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin:26px 0}.primary-button,.secondary-button{min-height:46px;padding:10px 22px;border:1px solid var(--red);font-size:16px}.primary-button{background:var(--red);color:#fff0d8}.secondary-button{background:transparent;color:var(--red)}.quiz-result{font-size:16px;line-height:1.7;margin:0}.practice-block{border:1px solid var(--line);background:var(--surface);padding:28px;margin-top:22px}.practice-block h3{font:1.5rem var(--serif);margin:0 0 15px}.practice-block p,.practice-block li{font-size:16px;line-height:1.85}.practice-block textarea{width:100%;min-height:160px;resize:vertical;border:1px solid var(--line);background:#f6ecd8;padding:16px;line-height:1.85;border-radius:0;color:var(--ink)}.practice-block summary{cursor:pointer;color:var(--red);font-size:16px;padding-block:15px;min-height:48px}.sample-answer{white-space:pre-line}.study-resource{display:flex;justify-content:space-between;align-items:center;gap:30px;margin-top:36px;padding-top:24px;border-top:1px solid var(--line)}.study-resource p{font-size:14px;line-height:1.8;color:var(--muted);margin:0;max-width:660px}.study-resource a{font-size:14px;min-height:44px;display:flex;align-items:center;flex:none}.filter-tabs{display:flex;gap:8px;flex-wrap:wrap}.filter-tabs button{min-height:44px;background:transparent;border:1px solid var(--line);font-size:16px;padding:8px 20px}.filter-tabs button.active{color:#fff0d8;background:var(--red);border-color:var(--red)}#knowledge-count{font-size:14px;color:var(--muted);white-space:nowrap}.knowledge-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.knowledge-card{background:var(--surface);border:1px solid var(--line);padding:25px;min-width:0}.knowledge-meta{font-size:12px;color:var(--red);margin:0 0 10px}.knowledge-card h2{font:1.55rem/1.5 var(--serif);margin:0 0 13px}.knowledge-card p{font-size:16px;line-height:1.85;white-space:pre-line}.knowledge-card .knowledge-meta{font-size:12px}.knowledge-card .core{margin-bottom:12px}.knowledge-card summary{min-height:44px;cursor:pointer;font-size:14px;color:var(--red);padding-block:10px}.knowledge-card details p{margin:10px 0 0}.knowledge-card .mistake{color:#795444}#subject-intro{font-size:16px;line-height:1.9;margin:0 0 24px;color:var(--muted)}.loading-note{padding:24px 0;line-height:1.8}.site-footer>a:last-child{font-size:14px}
@media(max-width:760px){.learning-portals{grid-template-columns:1fr}.learning-portal+.learning-portal{border-left:0;border-top:1px solid var(--line)}.learning-portal{padding:25px}.study-heading{padding-top:32px}.study-heading h1{font-size:2.5rem}.quiz-grid,.knowledge-grid{grid-template-columns:1fr}.study-resource{display:block}.study-resource a{margin-top:10px}.daily-toolbar{align-items:flex-start}.daily-toolbar>div{display:block}.daily-toolbar strong{display:block;margin-top:8px}.daily-toolbar label{display:block}.daily-toolbar select{display:block;margin-top:8px}.lesson-heading{display:block}.lesson-heading>span{display:block;margin-top:8px}.knowledge-toolbar{align-items:flex-start;flex-wrap:wrap}.quiz-card,.knowledge-card,.practice-block{padding:22px}.filter-tabs button{padding:8px 18px}}
@media(max-width:400px){.subject-stamp{font-size:1.6rem;padding:10px}.study-heading h1{font-size:2.15rem;letter-spacing:2px}.study-heading{gap:12px}.daily-toolbar{gap:12px}.daily-toolbar select{max-width:148px;font-size:14px}.daily-toolbar strong{font-size:1.15rem}.quiz-actions button{flex:1;padding-inline:12px}.quiz-result{width:100%}.quiz-card,.knowledge-card,.practice-block{padding:18px}.filter-tabs button{padding-inline:15px}}

@media(hover:hover) and (pointer:fine){.nav-learn:not(.menu-dismissed):hover .learn-menu{display:block}}