.abc-guide{padding:0 0 64px}.breadcrumbs{display:flex;justify-content:flex-start;gap:12px;font-size:12px;color:var(--muted);padding-top:28px}.breadcrumbs a{text-decoration:underline;text-underline-offset:4px}.abc-intro{padding:48px 0 60px;border-bottom:1px solid var(--line)}.abc-intro h1{font-size:clamp(38px,5.3vw,72px);letter-spacing:-.035em;line-height:1.1;max-width:1000px;text-wrap:balance}.abc-intro h1 span{color:var(--accent)}.abc-lead{font-size:clamp(18px,2vw,23px);line-height:1.55;max-width:65ch;margin-top:28px;color:var(--text)}.abc-context{max-width:73ch;font-size:15px;line-height:1.7;margin-top:18px}.abc-intro .button{margin-top:28px}.abc-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:72px;padding-top:48px}.abc-index{position:sticky;top:110px;align-self:start}.abc-index nav{display:flex;flex-direction:column;gap:0;font-size:14px}.abc-index strong{font-size:13px;color:var(--text);margin-bottom:12px}.abc-index nav a,.abc-start{display:block;padding:10px 0;min-height:44px;color:var(--muted)}.abc-index a:hover{color:var(--accent)}.abc-start{font-size:13px}.abc-content{min-width:0;max-width:850px}.abc-search h2{font-size:25px;line-height:1.2;letter-spacing:-.025em}.search-control{margin-top:18px}.search-control label{display:block;font-size:13px;margin-bottom:8px;color:var(--muted)}.search-control input{font:inherit;width:100%;min-height:48px;border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:4px;padding:12px 16px;caret-color:var(--accent)}.search-control input::placeholder{color:var(--muted)}.search-control input:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.search-control p{font-size:12px;margin-top:10px}.exercise-group{padding-top:48px;scroll-margin-top:110px}.exercise-group>h2{font-size:clamp(28px,3vw,38px);letter-spacing:-.03em;color:var(--accent);margin-bottom:12px}.exercise{padding:28px 0;border-bottom:1px solid var(--line);scroll-margin-top:110px}.exercise-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}.exercise h3{font-size:23px;letter-spacing:-.025em;line-height:1.25}.exercise-level{font-size:11px;color:var(--muted);white-space:nowrap}.exercise>p{margin-top:14px;font-size:16px;line-height:1.75;max-width:73ch}.exercise dl{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:18px 0 0}.exercise dt{font-size:12px;font-weight:700;color:var(--text);margin-bottom:4px}.exercise dd{font-size:14px;line-height:1.6;margin:0;color:var(--muted)}.abc-reading{padding-top:60px;scroll-margin-top:100px}.abc-reading h2{font-size:clamp(26px,3vw,36px);line-height:1.2;letter-spacing:-.03em;margin-bottom:20px}.abc-reading>p{margin-top:16px;max-width:73ch;line-height:1.75}.abc-reading a{color:var(--text);text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:4px}.abc-reading details p{max-width:73ch;line-height:1.75}.abc-sources ul{padding-left:20px;font-size:13px;line-height:1.7;margin-top:18px}.abc-sources li+li{margin-top:10px}.abc-cta{display:flex;align-items:center;justify-content:space-between;gap:40px;border-top:1px solid var(--line);margin-top:64px;padding-top:48px}.abc-cta h2{font-size:clamp(30px,4vw,50px);line-height:1.15;letter-spacing:-.03em}.abc-cta p{margin-top:18px;max-width:60ch}.abc-cta .button{flex-shrink:0}#search-empty{padding:32px 0;color:var(--text)}.abc-guide [hidden]{display:none!important}.abc-guide a:focus-visible{outline-offset:4px}
@media(max-width:1000px){.abc-layout{grid-template-columns:170px minmax(0,1fr);gap:36px}}
@media(max-width:700px){.breadcrumbs{display:flex;padding-top:20px}.abc-intro{padding:32px 0 40px}.abc-layout{display:block;padding-top:28px}.abc-index{position:static;border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:32px}.abc-index nav{display:flex;flex-direction:row;flex-wrap:wrap;gap:4px 18px}.abc-index strong{flex-basis:100%;margin-bottom:0}.abc-index nav a{padding:8px 0}.abc-start{display:inline-block;margin-right:18px}.exercise-group{padding-top:36px}.exercise{padding:24px 0}.exercise-heading{gap:12px}.exercise h3{font-size:22px}.exercise dl{gap:16px;grid-template-columns:1fr}.abc-reading{padding-top:44px}.abc-cta{align-items:flex-start;flex-direction:column;gap:24px;margin-top:44px;padding-top:32px}.abc-guide{padding-bottom:48px}.site-footer .footer-bottom>div{flex-wrap:wrap}}

.exercise h3 small{display:block;font-size:12px;font-weight:400;letter-spacing:0;color:var(--muted);margin-top:5px}

.exercise{border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:26px 28px;margin-top:18px}.exercise-heading{align-items:flex-start}.exercise h3{font-size:25px}.exercise h3 small{font-size:14px;line-height:1.5;margin-top:8px}.exercise-level{border:1px solid var(--line);padding:4px 9px;border-radius:4px}.exercise-group>h2{margin-bottom:20px}.search-shortcuts{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.search-shortcuts button{font:inherit;font-size:13px;min-height:40px;padding:8px 12px;background:transparent;color:var(--text);border:1px solid var(--line);border-radius:4px;cursor:pointer}.search-shortcuts button:hover{border-color:var(--accent);color:var(--accent)}.search-shortcuts button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.search-control input{font-size:16px;min-height:54px}.abc-search{scroll-margin-top:110px}@media(max-width:700px){.exercise{padding:22px 18px}.exercise-heading{flex-wrap:wrap;gap:12px}.exercise h3{font-size:23px}.exercise h3 small{font-size:13px}.exercise dl{gap:18px}.search-shortcuts{gap:6px}.search-shortcuts button{min-height:44px}}

/* Exercise catalogue: full-width search and roomy, distinct tiles. */
.abc-layout{display:block;padding-top:40px}.abc-content{max-width:none}.abc-search{max-width:720px}.exercise-group{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;padding-top:48px}.exercise-group>h2{grid-column:1/-1;margin-bottom:4px}.exercise{margin:0;padding:28px;border:1px solid #3c4940;background:#1e2822;border-radius:6px;min-width:0}.exercise-heading{align-items:flex-start;flex-wrap:wrap;gap:12px}.exercise h3{font-size:24px}.exercise h3 small{font-size:13px;line-height:1.5;color:var(--muted)}.exercise-level{font-size:11px;padding:4px 8px;border:1px solid #48564b;border-radius:4px}.exercise>p{font-size:16px;line-height:1.65;margin-top:20px}.exercise dl{grid-template-columns:1fr;gap:16px;margin-top:24px;padding-top:20px;border-top:1px solid #3c4940}.exercise dt{font-size:13px}.exercise dd{font-size:14px}.abc-reading{max-width:850px}.abc-reading.abc-sources{max-width:850px}@media(max-width:700px){.abc-layout{padding-top:28px}.exercise-group{grid-template-columns:1fr;gap:16px;padding-top:36px}.exercise{padding:24px 20px}.exercise h3{font-size:23px}.exercise-group>h2{margin-bottom:4px}}

.exercise .exercise-source{font-size:12px;line-height:1.6;margin-top:20px;color:var(--muted)}.exercise-source a{color:var(--muted);text-decoration:underline;text-underline-offset:3px}.exercise-source a:hover{color:var(--accent)}.abc-context a{color:var(--text);text-decoration:underline;text-underline-offset:4px}.abc-cta h2{font-size:clamp(26px,3vw,38px)}.abc-sources{border-top:1px solid var(--line);margin-top:48px;padding-top:36px}