/* Training courses page (Learning Hub.dc.html, rendered by learning-hub.js). Colours, type and control sizes come
   from tokens.css: blue is the main action on light surfaces, navy marks a selected value, sky blue appears only on navy. */
.lh-page{font-family:var(--font);}
.lh-app{max-width:1180px;margin:0 auto;padding:0 18px 80px;}
.lh-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}
.lh-eyebrow{margin:0 0 6px;font-size:var(--text-2xs);font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--accentText);}

/* Buttons */
.lh-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:var(--btn-h);padding:9px 16px;border-radius:var(--btn-r);border:1px solid var(--line2);background:#fff;color:var(--ink);font:inherit;font-size:var(--btn-fs);font-weight:700;cursor:pointer;}
.lh-btn:hover{border-color:var(--accent);color:var(--accentText);}
.lh-btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accentInk);}
.lh-btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:var(--accentInk);}
.lh-link{margin-top:6px;padding:4px 0;border:0;background:none;font:inherit;font-size:var(--text-ui);font-weight:650;color:var(--accentText);text-decoration:underline;cursor:pointer;}

/* Home */
.lh-home{padding-top:36px;}
.lh-intro{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:26px;}
.lh-intro-copy{flex:1 1 420px;min-width:0;}
.lh-intro h1{margin:0;font-size:var(--text-4xl);line-height:1.1;letter-spacing:-.03em;}
.lh-intro-copy>p{margin:12px 0 0;max-width:60ch;font-size:var(--text-base);line-height:1.6;color:var(--dim);}
.lh-intro-copy>p.lh-about{display:inline-block;margin-top:14px;padding:9px 13px;background:#fff;border:1px solid var(--line);border-radius:10px;font-size:var(--text-ui);line-height:1.55;}
.lh-about b{color:var(--ink);}
.lh-stats{display:flex;gap:6px;margin:0;padding:14px 10px;background:#fff;border:1px solid var(--line);border-radius:14px;}
.lh-stats div{display:flex;flex-direction:column-reverse;align-items:center;padding:0 12px;}
.lh-stats div+div{border-left:1px solid var(--line);}
.lh-stats dt{font-size:var(--text-2xs);font-weight:650;text-transform:uppercase;letter-spacing:.06em;color:var(--faint);text-align:center;}
.lh-stats dd{margin:0;font-size:var(--text-2xl);font-weight:750;color:var(--accent);}
.lh-course-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.lh-course-card{position:relative;display:flex;flex-direction:column;gap:14px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;}
.lh-course-card::before{content:"";position:absolute;inset:0 0 auto;height:4px;background:var(--accent);}
.lh-course-card.is-com::before{background:var(--ev-navy);}
.lh-course-head{display:flex;align-items:center;gap:14px;}
.lh-course-head h2{margin:0;font-size:var(--text-xl);letter-spacing:-.01em;}
.lh-ring{flex:none;display:grid;place-items:center;width:56px;height:56px;border-radius:50%;background:conic-gradient(var(--accent) calc(var(--p)*1%),var(--line) 0);}
.lh-ring b{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:#fff;font-size:var(--text-xs);}
.lh-course-blurb{margin:0;font-size:var(--text-sm);line-height:1.6;color:var(--dim);}
.lh-course-lessons{display:flex;flex-direction:column;gap:4px;margin:0;padding:0;list-style:none;}
.lh-course-lessons li{display:flex;align-items:center;gap:9px;font-size:var(--text-ui);color:var(--dim);}
.lh-course-lessons li.is-done{color:var(--ink);}
.lh-dot{flex:none;display:grid;place-items:center;width:20px;height:20px;border-radius:50%;border:1px solid var(--line2);background:#fff;font-size:var(--text-2xs);font-weight:800;color:var(--faint);}
.lh-dot.is-done,.is-done>.lh-dot{background:var(--ev-ok);border-color:var(--ev-ok);color:#fff;}
.lh-chips{display:flex;flex-wrap:wrap;gap:6px;}
.lh-chips span{padding:3px 10px;border:1px solid var(--line);border-radius:999px;background:var(--panel);font-size:var(--text-2xs);font-weight:650;color:var(--dim);}
.lh-best{margin:0;padding:8px 12px;border-radius:10px;background:var(--panel);border:1px solid var(--line);font-size:var(--text-ui);font-weight:650;color:var(--dim);}
.lh-best.is-pass{background:var(--ev-ok-bg);border-color:#cfe3a6;color:var(--ev-ok);}
.lh-course-card .lh-btn{margin-top:auto;min-height:44px;font-size:var(--text-sm);}
.lh-how{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:16px;}
.lh-how>*{display:block;padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:12px;color:var(--ink);text-decoration:none;}
.lh-how a:hover{border-color:var(--accent);}
.lh-how b{font-size:var(--text-ui);}
.lh-how p{margin:4px 0 0;font-size:var(--text-xs);line-height:1.55;color:var(--dim);}

/* Course layout */
.lh-layout{display:flex;align-items:flex-start;gap:32px;padding-top:30px;}
.lh-rail{position:sticky;top:90px;flex:none;width:260px;display:flex;flex-direction:column;gap:12px;}
.lh-back{align-self:flex-start;display:inline-flex;align-items:center;gap:6px;min-height:38px;padding:7px 12px;border:1px solid var(--line2);border-radius:9px;background:#fff;font:inherit;font-size:var(--text-ui);font-weight:650;color:var(--dim);cursor:pointer;}
.lh-back:hover{border-color:var(--accent);color:var(--ink);}
.lh-rail-card{display:flex;flex-direction:column;gap:8px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:14px;}
.lh-rail-card .lh-eyebrow{margin:0;}
.lh-rail-title{font-size:var(--text-base);letter-spacing:-.01em;}
.lh-rail-card small{font-size:var(--text-xs);color:var(--faint);}
.lh-bar{display:block;height:6px;border-radius:3px;background:var(--panel);overflow:hidden;}
.lh-bar i{display:block;height:100%;border-radius:3px;background:var(--accent);}
.lh-rail-list{display:flex;flex-direction:column;gap:2px;margin:4px 0 0;padding:0;list-style:none;}
.lh-rail-item{position:relative;display:flex;align-items:center;gap:9px;width:100%;min-height:38px;padding:7px 9px;border:1px solid transparent;border-radius:9px;background:transparent;font:inherit;font-size:var(--text-ui);font-weight:600;line-height:1.3;color:var(--dim);text-align:left;cursor:pointer;}
.lh-rail-item:hover{background:var(--panel);}
.lh-rail-item.is-on{background:var(--panel);border-color:var(--line2);color:var(--ink);font-weight:700;}
.lh-rail-item small{display:block;font-size:var(--text-2xs);font-weight:600;color:var(--faint);}
.lh-rail-item.is-check{margin-top:4px;border-top:1px solid var(--line);border-radius:0 0 9px 9px;padding-top:10px;}
.lh-rail-item.is-check.is-on{border-radius:9px;}
.lh-main{flex:1;min-width:0;max-width:760px;display:flex;flex-direction:column;gap:16px;}

/* Lesson */
.lh-lesson{padding:26px;background:#fff;border:1px solid var(--line);border-radius:16px;}
.lh-lesson h2{margin:0;font-size:var(--text-2xl);letter-spacing:-.02em;line-height:1.2;}
.lh-lesson h2:focus,.lh-check h2:focus,.lh-result h2:focus{outline:none;}
.lh-aim{margin:10px 0 0;padding:9px 12px;border-left:3px solid var(--accent);background:var(--ev-info-bg);border-radius:0 8px 8px 0;font-size:var(--text-sm);line-height:1.55;color:var(--ink);}
.lh-body{margin-top:6px;font-size:var(--text-base);line-height:1.65;color:var(--ink);}
.lh-body>p{margin:14px 0 0;}
.lh-body h3{margin:22px 0 0;font-size:var(--text-base);letter-spacing:-.01em;}
.lh-list{margin:8px 0 0;padding-left:20px;}
.lh-list li+li{margin-top:7px;}
.lh-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:10px;}
.lh-cards.is-stack{grid-template-columns:minmax(0,1fr);}
.lh-card{padding:12px 14px;border:1px solid var(--line);border-radius:10px;}
.lh-card b{font-size:var(--text-sm);}
.lh-card p{margin:4px 0 0;font-size:var(--text-sm);line-height:1.55;color:var(--dim);}
.lh-card.is-ok{background:var(--ev-ok-bg);border-color:#cfe3a6;}
.lh-card.is-ok b{color:var(--ev-ok);}
.lh-card.is-warn{background:var(--ev-warn-bg);border-color:#f0d39a;}
.lh-card.is-warn b{color:var(--ev-warn);}
.lh-figs{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-top:14px;}
.lh-figs div{padding:12px;background:var(--panel);border:1px solid var(--line);border-radius:10px;text-align:center;}
.lh-figs b{display:block;font-size:var(--text-xl);color:var(--accent);}
.lh-figs span{display:block;margin-top:3px;font-size:var(--text-xs);line-height:1.45;color:var(--dim);}
.lh-figs.is-warn div{background:var(--ev-warn-bg);border-color:#f0d39a;}
.lh-figs.is-warn b{color:var(--ev-warn);}
.lh-note{margin-top:14px;padding:10px 13px;border:1px solid var(--line);border-radius:10px;background:var(--panel);font-size:var(--text-sm);line-height:1.55;color:var(--dim);}
.lh-note b{color:var(--ink);}
.lh-note.is-info{background:var(--ev-info-bg);border-color:#c9dbf8;color:var(--ev-info);}
.lh-note.is-warn{background:var(--ev-warn-bg);border-color:#f0d39a;color:var(--ev-warn);}
.lh-note.is-info b,.lh-note.is-warn b{color:inherit;}
.lh-example{margin-top:14px;padding:12px 14px;border:1px dashed var(--line2);border-radius:10px;background:#fbfcfd;}
.lh-example-title{font-size:var(--text-sm);}
.lh-example ul{margin:6px 0 0;padding-left:18px;font-size:var(--text-sm);}
.lh-example p{margin:8px 0 0;font-size:var(--text-sm);font-weight:650;line-height:1.55;}
.lh-table-wrap{margin-top:10px;overflow-x:auto;border:1px solid var(--line);border-radius:10px;}
.lh-table{width:100%;border-collapse:collapse;font-size:var(--text-sm);}
.lh-table th,.lh-table td{padding:8px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;line-height:1.45;}
.lh-table thead th{background:var(--panel);font-size:var(--text-2xs);text-transform:uppercase;letter-spacing:.06em;color:var(--faint);}
.lh-table tbody tr:last-child>*{border-bottom:0;}
.lh-table tbody th{font-weight:700;white-space:nowrap;}
.lh-flow{display:flex;align-items:stretch;margin-top:14px;padding:14px;overflow-x:auto;background:var(--panel);border:1px solid var(--line);border-radius:12px;}
.lh-flow-step{flex:1 0 auto;min-width:96px;padding:9px 11px;border:1.5px solid var(--ev-navy);border-radius:10px;background:#fff;text-align:center;}
.lh-flow-step span{display:block;font-size:var(--text-2xs);font-weight:650;color:var(--dim);}
.lh-flow-step b{display:block;font-size:var(--text-ui);}
.lh-flow-step.is-navy{background:var(--ev-navy);color:#fff;}
.lh-flow-step.is-navy span{color:var(--ev-on-navy);}
.lh-flow-step.is-accent{border-color:var(--accent);}
.lh-flow-step.is-accent b{color:var(--accent);}
.lh-flow-step.is-solid{background:var(--accent);border-color:var(--accent);color:#fff;}
.lh-flow-step.is-solid span{color:#dbe7fd;}
.lh-flow-arrow{display:grid;place-items:center;padding:0 6px;font-weight:700;color:var(--faint);}
.lh-tree{margin-top:14px;padding:14px;background:var(--panel);border:1px solid var(--line);border-radius:12px;overflow-x:auto;}
.lh-tree-row{display:flex;align-items:center;gap:8px;}
.lh-tree-row span{padding:8px 12px;border:1.5px solid var(--ev-navy);border-radius:9px;background:#fff;font-size:var(--text-xs);font-weight:700;white-space:nowrap;}
.lh-tree-row span.is-navy{background:var(--ev-navy);color:#fff;}
.lh-tree-row span.is-accent{border-color:var(--accent);color:var(--accentText);}
.lh-tree-row i{font-style:normal;font-weight:700;color:var(--faint);}
.lh-tree-legs{display:flex;flex-direction:column;gap:6px;margin:8px 0 0 auto;padding-left:16px;border-left:2px solid var(--accent);width:max-content;}
.lh-tree-legs span{padding:5px 10px;border-radius:8px;background:var(--accent);color:#fff;font-size:var(--text-xs);font-weight:700;white-space:nowrap;}
.lh-section{margin-top:14px;padding:14px;background:var(--panel);border:1px solid var(--line);border-radius:12px;}
.lh-section-surface{height:8px;border-radius:3px;background:repeating-linear-gradient(90deg,#64798a 0 14px,#b8c0c8 14px 28px);}
.lh-section-body{display:flex;gap:14px;margin-top:8px;}
.lh-section-base{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px;border:1.5px dashed #b8a98e;border-radius:10px;background:#fbf8f1;}
.lh-section-block{width:86%;padding:12px 6px;border-radius:6px;background:var(--ev-navy);color:#fff;text-align:center;}
.lh-section-block span{display:block;font-size:var(--text-2xs);font-weight:700;}
.lh-section-block b{font-size:var(--text-ui);}
.lh-section-base i{width:16px;height:26px;border-radius:4px;background:var(--accent);}
.lh-section-base small{font-size:var(--text-2xs);font-weight:650;color:var(--dim);text-align:center;}
.lh-section-specs{flex:1;display:flex;flex-direction:column;justify-content:center;gap:6px;margin:0;}
.lh-section-specs div{display:flex;justify-content:space-between;gap:10px;padding-bottom:4px;border-bottom:1px dotted var(--line2);font-size:var(--text-xs);}
.lh-section-specs div:last-child{border-bottom:0;}
.lh-section-specs dt{font-weight:650;color:var(--dim);}
.lh-section-specs dd{margin:0;font-weight:750;white-space:nowrap;}
.lh-steps{margin:6px 0 0;padding:0;list-style:none;counter-reset:lhstep;}
.lh-steps li{position:relative;padding:0 0 14px 38px;counter-increment:lhstep;}
.lh-steps li::before{content:counter(lhstep);position:absolute;left:0;top:0;display:grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--accent);color:#fff;font-size:var(--text-xs);font-weight:700;}
.lh-steps li::after{content:"";position:absolute;left:12px;top:30px;bottom:2px;width:2px;background:var(--line2);}
.lh-steps li:last-child::after{display:none;}
.lh-steps b{font-size:var(--text-sm);}
.lh-steps p{margin:2px 0 0;font-size:var(--text-sm);line-height:1.55;color:var(--dim);}
.lh-plan{margin:18px 0 0;padding:10px 13px;border-radius:10px;background:var(--ev-navy);color:#fff;font-size:var(--text-sm);line-height:1.55;}
.lh-plan b{color:var(--ev-sky);}

/* Calculators */
.lh-widget{display:flex;flex-direction:column;gap:12px;margin-top:14px;padding:16px;background:var(--panel);border:1px solid var(--line);border-radius:12px;}
.lh-widget-title{margin:0;font-size:var(--text-2xs);font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);}
.lh-controls{display:flex;flex-wrap:wrap;gap:14px;}
.lh-control-label{display:block;margin-bottom:5px;font-size:var(--text-2xs);font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--dim);}
.lh-seg{display:flex;flex-wrap:wrap;gap:4px;}
.lh-seg button{min-height:36px;padding:6px 12px;border:1px solid var(--line2);border-radius:8px;background:#fff;font:inherit;font-size:var(--text-xs);font-weight:650;color:var(--dim);cursor:pointer;}
.lh-seg button:hover{border-color:var(--ev-navy);color:var(--ink);}
.lh-seg button[aria-pressed="true"]{background:var(--ev-navy);border-color:var(--ev-navy);color:#fff;}
.lh-meter-top{display:flex;justify-content:space-between;gap:10px;margin-bottom:4px;font-size:var(--text-xs);font-weight:650;color:var(--dim);}
.lh-meter-top b{color:var(--ink);}
.lh-meter-bar{display:block;height:14px;border:1px solid var(--line2);border-radius:8px;background:#fff;overflow:hidden;}
.lh-meter-bar i{display:block;height:100%;transition:width .25s ease;}
.lh-meter-bar i.is-ok{background:var(--ev-ok);}
.lh-meter-bar i.is-warn{background:#ce9e2e;}
.lh-meter-bar i.is-bad{background:var(--ev-bad);}
.lh-verdict{margin:7px 0 0;font-size:var(--text-sm);font-weight:700;line-height:1.5;}
.lh-verdict.is-ok{color:var(--ev-ok);}
.lh-verdict.is-warn{color:var(--ev-warn);}
.lh-verdict.is-bad{color:var(--ev-bad);}
.lh-results{display:flex;flex-wrap:wrap;gap:12px;}
.lh-results div{flex:1;min-width:130px;padding:12px 14px;border:1px solid var(--line2);border-radius:10px;background:#fff;text-align:center;}
.lh-results b{display:block;font-size:var(--text-2xl);color:var(--accent);}
.lh-results span{font-size:var(--text-2xs);font-weight:650;text-transform:uppercase;letter-spacing:.05em;color:var(--dim);}
.lh-widget-note{margin:0;font-size:var(--text-xs);line-height:1.55;color:var(--dim);}

/* Questions */
.lh-practice{padding:20px 22px;background:#fff;border:2px solid var(--accent);border-radius:16px;}
.lh-practice-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:6px;}
.lh-practice-head h3{margin:0;font-size:var(--text-base);}
.lh-practice-head span{font-size:var(--text-xs);font-weight:650;color:var(--faint);}
.lh-q+.lh-q{margin-top:18px;padding-top:18px;border-top:1px solid var(--line);}
.lh-q-stem{margin:8px 0 10px;font-size:var(--text-base);font-weight:700;line-height:1.45;}
.lh-q-num{display:inline-grid;place-items:center;width:22px;height:22px;margin-right:8px;border-radius:50%;background:var(--ev-navy);color:#fff;font-size:var(--text-2xs);vertical-align:2px;}
.lh-opts{display:flex;flex-direction:column;gap:6px;}
.lh-opt{display:flex;align-items:flex-start;gap:10px;width:100%;min-height:44px;padding:9px 12px;border:1px solid var(--line2);border-radius:10px;background:#fff;font:inherit;font-size:var(--text-sm);font-weight:600;line-height:1.45;color:var(--ink);text-align:left;cursor:pointer;}
.lh-opt:hover:not(:disabled){border-color:var(--accent);background:#f8faff;}
.lh-opt:disabled{cursor:default;}
.lh-opt-key{flex:none;display:grid;place-items:center;width:22px;height:22px;border-radius:6px;background:var(--panel);border:1px solid var(--line2);font-size:var(--text-2xs);font-weight:800;color:var(--dim);}
.lh-opt-text{flex:1;min-width:0;}
.lh-opt-tag{flex:none;align-self:center;padding:2px 8px;border-radius:999px;font-size:var(--text-2xs);font-weight:750;}
.lh-opt.is-right{border:1.5px solid var(--ev-ok);background:var(--ev-ok-bg);}
.lh-opt.is-right .lh-opt-key{background:var(--ev-ok);border-color:var(--ev-ok);color:#fff;}
.lh-opt.is-right .lh-opt-tag{background:var(--ev-ok);color:#fff;}
.lh-opt.is-wrong{border:1.5px solid var(--ev-bad);background:var(--ev-bad-bg);}
.lh-opt.is-wrong .lh-opt-key{background:var(--ev-bad);border-color:var(--ev-bad);color:#fff;}
.lh-opt.is-wrong .lh-opt-tag{background:var(--ev-bad);color:#fff;}
.lh-opt.is-dim{color:var(--dim);background:var(--panel);}
.lh-fb{margin-top:10px;padding:11px 13px;border-radius:10px;font-size:var(--text-sm);line-height:1.55;}
.lh-fb p{margin:0;}
.lh-fb p+p{margin-top:6px;}
.lh-fb.is-right{background:var(--ev-ok-bg);border:1px solid #cfe3a6;color:#2f5410;}
.lh-fb.is-wrong{background:var(--ev-bad-bg);border:1px solid #f2c4c2;color:#7a241d;}
.lh-fb b{color:inherit;}
.lh-related{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:10px 14px;background:#fff;border:1px solid var(--line);border-radius:12px;}
.lh-related>span{font-size:var(--text-2xs);font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);}
.lh-related a{display:inline-flex;align-items:center;gap:5px;min-height:32px;padding:4px 11px;border:1px solid var(--line2);border-radius:999px;background:var(--panel);font-size:var(--text-xs);font-weight:650;color:var(--ink);text-decoration:none;}
.lh-related a:hover{border-color:var(--accent);color:var(--accentText);}
.lh-nav{display:flex;justify-content:space-between;gap:10px;}

/* Knowledge check and result */
.lh-check,.lh-result{padding:24px;background:#fff;border:1px solid var(--line);border-radius:16px;}
.lh-check-head{display:flex;align-items:center;flex-wrap:wrap;gap:10px;}
.lh-check-head h2{margin:0;font-size:var(--text-sm);font-weight:700;color:var(--dim);}
.lh-check-score{margin-left:auto;font-size:var(--text-xs);font-weight:650;color:var(--faint);}
.lh-pill{padding:3px 10px;border-radius:999px;background:var(--ev-navy);color:#fff;font-size:var(--text-2xs);font-weight:700;letter-spacing:.1em;text-transform:uppercase;}
.lh-dots{display:flex;gap:4px;margin:12px 0 4px;}
.lh-dots i{flex:1;height:5px;border-radius:3px;background:var(--line);}
.lh-dots i.is-on{background:var(--ev-navy);}
.lh-dots i.is-right{background:var(--ev-ok);}
.lh-dots i.is-wrong{background:var(--ev-bad);}
.lh-check .lh-q-stem{font-size:var(--text-xl);line-height:1.35;letter-spacing:-.01em;}
.lh-check-next{display:flex;justify-content:flex-end;margin-top:12px;}
.lh-result h2{margin:0;font-size:var(--text-2xl);letter-spacing:-.02em;}
.lh-result>p{margin:10px 0 0;max-width:62ch;font-size:var(--text-sm);line-height:1.6;color:var(--dim);}
.lh-result h3{margin:24px 0 8px;font-size:var(--text-base);}
.lh-review{margin-top:14px;padding:12px 14px;border-radius:10px;background:var(--ev-info-bg);font-size:var(--text-sm);}
.lh-review ul{margin:6px 0 0;padding-left:18px;}
.lh-review a,.lh-missed a{color:var(--accentText);font-weight:650;}
.lh-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;}
.lh-missed{display:flex;flex-direction:column;gap:10px;margin:0;padding-left:20px;}
.lh-missed li{padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:var(--text-sm);line-height:1.55;}
.lh-missed p{margin:0;color:var(--dim);}
.lh-missed p+p{margin-top:6px;}
.lh-missed b{color:var(--ink);}
.lh-missed .lh-missed-q{font-weight:700;color:var(--ink);}
.lh-missed-link{font-size:var(--text-xs);}

@media (max-width:1100px){
  .lh-how{grid-template-columns:repeat(2,minmax(0,1fr));}
  .lh-layout{flex-direction:column;align-items:stretch;gap:18px;}
  .lh-rail{position:static;width:100%;}
  .lh-rail-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px;}
  .lh-rail-item.is-check{margin-top:0;border-top:1px solid transparent;border-radius:9px;padding-top:7px;}
  .lh-main{max-width:none;}
}
@media (max-width:700px){
  .lh-app{padding:0 16px 48px;}
  .lh-home{padding-top:24px;}
  .lh-intro h1{font-size:var(--text-3xl);}
  .lh-stats{width:100%;justify-content:space-between;}
  .lh-stats div{flex:1;padding:0 4px;}
  .lh-course-grid,.lh-cards,.lh-how{grid-template-columns:minmax(0,1fr);}
  .lh-layout{padding-top:20px;}
  /* On a phone the lesson list becomes a row of numbered steps; the lesson title is in the page below it. */
  .lh-rail-list{display:flex;flex-direction:row;flex-wrap:wrap;gap:6px;}
  .lh-rail-item{width:auto;min-width:44px;min-height:44px;justify-content:center;padding:6px;border-color:var(--line);}
  .lh-rail-item:not(.is-check)>span:last-child{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}
  .lh-rail-item.is-check{flex:1 1 auto;justify-content:flex-start;padding:6px 10px;border-color:var(--line);}
  .lh-lesson,.lh-check,.lh-result{padding:20px 18px;}
  .lh-practice{padding:18px 16px;}
  .lh-section-body{flex-direction:column;}
  .lh-tree-legs{margin-left:16px;}
  .lh-nav .lh-btn{flex:1;}
}
@media (max-width:520px){
  .lh-flow{flex-direction:column;}
  .lh-flow-arrow{transform:rotate(90deg);padding:2px 0;}
  .lh-flow-step{min-width:0;}
  .lh-check .lh-q-stem{font-size:var(--text-base);}
  .lh-opt{flex-wrap:wrap;}
  .lh-opt-text{flex-basis:calc(100% - 40px);}
  .lh-opt-tag{margin-left:32px;}
}