:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,sans-serif;color:#192e36;background:#f5f7f4;font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:#126954;text-underline-offset:4px}header,main,footer{max-width:1240px;margin:auto;padding:24px 32px}header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #dce3dd}.brand{font-weight:800;font-size:21px;color:#192e36;text-decoration:none}.mark{background:#174b40;color:white;padding:6px 9px;border-radius:8px;margin-right:10px}nav{display:flex;gap:24px;font-size:14px}h1{font-size:clamp(32px,4vw,48px);letter-spacing:-2px;line-height:1.1;margin:12px 0 16px}h2{font-size:24px;letter-spacing:-.6px}p,li{line-height:1.75}.eyebrow{text-transform:uppercase;letter-spacing:2px;font-size:11px;font-weight:800;color:#397563}.intro{display:flex;justify-content:space-between;gap:28px;align-items:center;margin:24px 0}.intro p{color:#61716f;margin-bottom:0}.badge{white-space:nowrap;background:#e4eee5;padding:10px 16px;border-radius:24px;font-size:13px}.workspace{border:1px solid #cedbd2;background:white;border-radius:16px;overflow:hidden;box-shadow:0 12px 35px #18352b08}.toolbar{padding:16px;display:flex;gap:9px;align-items:center;flex-wrap:wrap;background:#eef2ed;border-bottom:1px solid #dce3dd}button,.button,select{font:inherit;font-size:13px;border:1px solid #cbd7cf;border-radius:7px;background:white;padding:9px 13px;color:#23463b;cursor:pointer;text-decoration:none}button.primary{background:#1d624f;color:white;border-color:#1d624f}button:hover,.button:hover{filter:brightness(.95)}button:disabled{opacity:.45;cursor:default}.spacer{flex:1}.editors{display:grid;grid-template-columns:1fr 1fr}.pane{min-width:0}.pane+ .pane{border-left:1px solid #dce3dd}.pane-title{display:flex;justify-content:space-between;padding:14px 18px;font-size:11px;letter-spacing:1.3px;font-weight:800;color:#64756c;border-bottom:1px solid #e8ece6}textarea{display:block;width:100%;min-height:345px;border:0;resize:vertical;padding:20px;background:#fff;color:#233f37;font:13px/1.8 ui-monospace,SFMono-Regular,Consolas,monospace;tab-size:2}textarea:focus{outline:2px solid #4f9b78;outline-offset:-2px}#output{background:#f8faf7}.status{padding:13px 18px;border-top:1px solid #dce3dd;background:#f1f6ef;font-size:13px;min-height:46px}.status.error{background:#fff0e9;color:#9e3a22}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:32px 0}.card{border:1px solid #dce3dd;background:#fff;padding:24px;border-radius:12px}.card h2{font-size:17px;margin:4px 0 12px}.card p{font-size:14px;color:#62716a;margin:0}.article{max-width:820px;margin:36px auto}.article h1{font-size:38px}.article h2{margin-top:36px}.article pre{padding:20px;overflow:auto;background:#eaf0e9;border-radius:10px}.article code{font-family:ui-monospace,monospace}details{padding:18px 0;border-bottom:1px solid #dce3dd}summary{cursor:pointer;font-weight:650}footer{border-top:1px solid #dce3dd;font-size:12px;display:flex;justify-content:space-between;gap:20px;color:#63746a}footer div{display:flex;gap:18px}label{font-size:12px}input[type=file]{display:none}:focus-visible{outline:3px solid #49a889;outline-offset:3px}@media(max-width:720px){header,main,footer{padding:20px}nav{gap:12px}.intro{display:block}.badge{display:inline-block;margin:16px 0 0}.editors{grid-template-columns:1fr}.pane+.pane{border-left:0;border-top:1px solid #dce3dd}textarea{min-height:240px}.cards{grid-template-columns:1fr;gap:12px}footer{flex-direction:column}h1{letter-spacing:-1px}.toolbar .spacer{display:none}}
/* Responsive controls and safe grid sizing on narrow screens. */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}header,main,footer{width:100%}header{gap:16px;flex-wrap:wrap}.brand{flex-shrink:0}nav{flex-wrap:wrap}.editors{grid-template-columns:repeat(2,minmax(0,1fr))}.cards{grid-template-columns:repeat(3,minmax(0,1fr))}.card,.intro>*{min-width:0}.card,p,h1,h2,summary,.status{overflow-wrap:break-word}button,.button,select{min-height:44px;max-width:100%}.pane-title{gap:10px;flex-wrap:wrap}textarea{font-size:16px;min-width:0;max-width:100%}.article pre{max-width:100%;font-size:14px}footer div{flex-wrap:wrap}.toolbar label{min-height:44px;display:inline-flex;align-items:center;gap:5px}.toolbar select{font-size:16px}.badge{white-space:normal}
@media(max-width:900px){.intro{display:block}.badge{display:inline-block;margin-top:16px}.cards{grid-template-columns:1fr}.editors{grid-template-columns:1fr}.pane+.pane{border-left:0;border-top:1px solid #dce3dd}}
@media(max-width:480px){header,main,footer{padding-left:16px;padding-right:16px}header nav{margin-left:auto;font-size:13px}.brand{font-size:18px}.mark{margin-right:6px}.toolbar{padding:12px;gap:8px}.toolbar button{flex:1 1 auto}.pane-title{padding:12px}textarea{padding:14px;min-height:240px}.article h1{font-size:30px}footer{flex-direction:column}}