@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Playfair+Display:ital,wght@0,500;0,600;0,700;1,500&display=swap');
:root{--bg:#f7f3e9;--ink:#173d36;--muted:#66736b;--gold:#a57632;--line:#dedfd2}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--bg);color:var(--ink);font-family:'DM Sans',sans-serif}header,main{max-width:1240px;margin:auto}header{display:flex;justify-content:space-between;align-items:center;padding:28px 32px;border-bottom:1px solid var(--line)}a{color:inherit}.brand{text-decoration:none;display:flex;align-items:center;gap:12px;font-size:24px}.brand span{font-size:14px;font-weight:700;letter-spacing:2px}.brand small{display:block;font-size:9px;letter-spacing:1px;margin-top:5px}nav{display:flex;gap:28px;font-size:13px}nav a{text-decoration:none}main{padding:0 32px}section{margin-bottom:75px}.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:70px;padding:70px 0 0;align-items:center}.eyebrow{font-size:11px;letter-spacing:2px;font-weight:700;color:var(--gold)}h1,h2,h3{font-family:'Playfair Display',Georgia,serif}h1{font-size:clamp(44px,5vw,68px);line-height:1.12;font-weight:500;margin:24px 0}h1 em{color:var(--gold)}.intro{max-width:440px;font-size:16px;line-height:1.8;color:var(--muted)}.primary{display:inline-flex;justify-content:space-between;gap:35px;align-items:center;background:var(--ink);color:white;padding:17px 24px;border:0;border-radius:6px;text-decoration:none;cursor:pointer;font:600 14px 'DM Sans',sans-serif;margin-top:12px}.metrics{display:flex;gap:26px;margin-top:38px;font-size:11px;color:var(--muted)}.metrics b{color:var(--ink);font-size:20px;display:block;margin-bottom:4px}.hero-card{background:var(--ink);color:#f7f3e9;padding:34px 36px;border-radius:100px 100px 12px 12px;text-align:center;box-shadow:12px 14px 0 #e8e4d4;position:relative}.hero-card .eyebrow{color:#d1b87e;font-size:10px}.ornament{font-size:70px;color:#d1b87e;margin:20px}.hero-card h2{font-size:44px;margin:15px}.big-code{letter-spacing:3px;color:#e4c992;font-size:19px}.hero-card p:not(.eyebrow){line-height:1.7}.card-note{border-top:1px solid #ffffff30;padding:20px 0;font-size:13px;color:#cbd7cd}.hero-card small{font-size:9px;letter-spacing:2px}.path{display:flex;align-items:center;justify-content:space-between;border-block:1px solid var(--line);padding:18px 0;gap:12px;font-size:12px}.path>span{font-size:10px;letter-spacing:1px;color:var(--muted)}.path b{color:var(--gold);margin-right:8px}.section-heading{display:flex;align-items:end;justify-content:space-between}h2{font-size:36px;font-weight:500;margin:12px 0 24px}.section-heading>p{font-size:13px;color:var(--muted)}.tools{display:flex;align-items:center;gap:22px;font-size:13px}.search{display:flex;gap:12px;align-items:center;border:1px solid var(--line);border-radius:6px;padding:12px 16px;background:white;flex:1;font-size:22px}.search input{border:0;outline:none;font:14px 'DM Sans',sans-serif;width:100%;color:var(--ink)}.filters{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0 12px}.filters button,.plain{background:transparent;border:1px solid var(--line);padding:9px 15px;border-radius:4px;cursor:pointer;color:var(--ink);font:12px 'DM Sans',sans-serif}.filters .active{background:var(--ink);color:white;border-color:var(--ink)}.hint{font-size:12px;line-height:1.6;color:var(--muted);max-width:850px;margin-bottom:24px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.term{background:#fffcf6;border:1px solid var(--line);border-radius:8px;padding:24px;display:flex;flex-direction:column;align-items:start}.term .category{font-size:10px;letter-spacing:1.5px;color:var(--gold);text-transform:uppercase}.term h3{font-size:26px;margin:13px 0}.term .definition{font-size:14px;line-height:1.65;margin:0 0 18px;flex:1}.code{background:#eeeede;padding:12px;border-radius:5px;width:100%;font-size:13px;line-height:1.5}.code b{display:block;font-size:9px;letter-spacing:1.5px;color:var(--muted);margin-bottom:5px}.term details{font-size:12px;line-height:1.6;margin:14px 0;width:100%}summary{cursor:pointer;color:var(--gold)}.learn{border:1px solid var(--line);background:transparent;color:var(--ink);cursor:pointer;border-radius:4px;padding:9px 13px;font-size:12px}.learn.done{background:#dbe9dc;border-color:#a8bbaa}.compare{background:#eaeade;border-radius:10px;padding:36px}.compare-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.compare h3{font-size:20px}.compare p{font-size:13px;line-height:1.9}.compare strong{font-size:13px;color:var(--gold)}.compare small{display:block;font-size:11px;line-height:1.7;margin-top:14px}.quiz-section{display:grid;grid-template-columns:1fr 1.2fr;gap:70px}.quiz-section>div>p{color:var(--muted);font-size:14px;line-height:1.8}.quiz{border:1px solid var(--line);background:#fffcf6;border-radius:10px;padding:30px}.quiz h3{font-size:24px;line-height:1.5}.answers{display:grid;grid-template-columns:1fr 1fr;gap:10px}.answers button{background:white;border:1px solid var(--line);padding:14px;border-radius:5px;text-align:left;font:14px 'DM Sans';color:var(--ink);cursor:pointer}.answers .correct{background:#dbe9dc;border-color:#477f51}.answers .wrong{background:#f5dcd4;border-color:#ac6857}.feedback{font-size:13px;line-height:1.6}footer{border-top:1px solid var(--line);padding:30px 0 45px;display:grid;grid-template-columns:1fr 1fr;gap:30px;font-size:12px;line-height:1.8;color:var(--muted)}footer b{color:var(--ink)}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid var(--gold);outline-offset:4px}@media(max-width:850px){.hero{gap:35px}.grid{grid-template-columns:1fr 1fr}.path{flex-wrap:wrap}.path>span{width:100%}.compare-grid{grid-template-columns:1fr}.quiz-section{gap:30px}}@media(max-width:600px){header{padding:20px}nav{gap:12px;font-size:11px}.brand span{font-size:10px;letter-spacing:1px}.brand small{font-size:7px}main{padding:0 20px}.hero{grid-template-columns:1fr;padding-top:35px}.hero-card{max-width:400px;width:100%;justify-self:center}.grid,.quiz-section,footer{grid-template-columns:1fr}.tools{flex-wrap:wrap}.search{flex-basis:100%}.section-heading{display:block}.compare{padding:24px}section{margin-bottom:45px}.path p{width:45%;margin:5px 0}.answers{grid-template-columns:1fr}}

.chapter{border:1px solid var(--line);border-radius:8px;background:#fffcf6;margin-bottom:12px;overflow:hidden}.chapter>summary{list-style:none;display:flex;align-items:center;gap:18px;padding:22px;color:var(--ink);font-size:19px;font-weight:600}.chapter summary::-webkit-details-marker{display:none}.chapter-no{color:var(--gold);font-size:13px}.chapter small{display:block;font-size:11px;font-weight:400;color:var(--muted);margin-top:5px}.chapter-arrow{margin-left:auto;color:var(--gold)}.chapter[open]>summary{border-bottom:1px solid var(--line)}.chapter>.grid{padding:18px;background:var(--bg)}.board{border:1px solid var(--line);border-radius:8px;padding:22px;margin-bottom:12px;background:#eeeee1}.board>summary{font-size:20px;font-weight:600;color:var(--ink)}.board p{font-size:13px;line-height:1.8}.board-code{color:var(--gold);font-weight:700;letter-spacing:1px}.table-wrap{overflow:auto;margin:20px 0}table{width:100%;border-collapse:collapse;min-width:550px;font-size:13px;line-height:1.7}th,td{text-align:left;padding:15px;vertical-align:top;border-bottom:1px solid #d2d8c9}th{background:var(--ink);color:white}td:first-child{min-width:120px}select{padding:12px;width:100%;max-width:350px;background:#fffcf6;color:var(--ink);border:1px solid var(--line);border-radius:5px;font:14px 'DM Sans'}.quiz-label{display:block;font-size:12px;margin-bottom:8px}.credit{text-align:center;color:var(--ink);font-size:12px;letter-spacing:2px;padding:0 0 25px}nav{flex-wrap:wrap}@media(max-width:600px){.chapter>summary{font-size:16px;padding:18px}.chapter>.grid{padding:10px}.board{padding:16px}.board>summary{font-size:17px}}

.subject-nav{display:flex;gap:8px;padding:24px 0;border-bottom:1px solid var(--line);flex-wrap:wrap}.subject-nav a{font-size:13px;text-decoration:none;padding:12px 18px;border:1px solid var(--line);border-radius:6px}.subject-nav [aria-current=page]{background:var(--ink);color:white;border-color:var(--ink)}@media(max-width:600px){.subject-nav a{flex:1;text-align:center;padding:10px;font-size:11px}}
