:root{color-scheme:dark;--bg:#0e1512;--panel:#18221d;--ink:#edf5ed;--muted:#acbcb1;--accent:#b5ef6d;--line:#344439;font-family:Inter,system-ui,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);line-height:1.6}header,main{max-width:1080px;margin:auto;padding:28px}header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}header>a{font-weight:900;font-size:25px;letter-spacing:-1px;text-decoration:none;color:var(--ink)}header>a>span{color:var(--accent)}.tag,.eyebrow,#badge{font-family:monospace;font-size:12px;letter-spacing:1px}.tag{color:var(--muted)}.intro{padding:52px 0 26px;max-width:850px}.eyebrow{color:var(--accent)}h1{font-size:clamp(36px,5.8vw,62px);font-weight:600;letter-spacing:-2px;line-height:1.12;margin:20px 0}h1 em{color:var(--accent);font-style:normal}.lead{max-width:660px;font-size:20px;color:#c5d3c9}.quiet{color:var(--muted);font-size:14px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:30px;max-width:850px}.panel-head{display:flex;gap:20px;align-items:center;justify-content:space-between}h2{font-size:20px;margin:0 0 10px}#badge{color:var(--accent);white-space:nowrap;font-size:10px}button{border:0;border-radius:8px;background:var(--accent);color:#112309;padding:16px 22px;font-size:16px;font-weight:700;min-height:48px;cursor:pointer;transition:transform .15s}button:hover:not(:disabled){transform:translateY(-2px)}button:disabled{opacity:.55;cursor:wait}.secondary{background:transparent;color:var(--accent);border:1px solid var(--line);margin-top:15px}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid var(--accent);outline-offset:4px}.steps{padding-left:22px;color:var(--muted);margin-top:24px}.steps .done{color:var(--accent)}.explanation{display:grid;grid-template-columns:1fr 1fr;gap:36px;margin:40px 0;max-width:850px}.number{font:14px monospace;color:var(--accent);display:block;margin-bottom:16px}article p,footer p{color:var(--muted)}details{max-width:850px;border-top:1px solid var(--line);padding:20px 0}summary{cursor:pointer;font-weight:600;min-height:44px}a{color:var(--accent)}label{display:block;margin-top:18px}input{width:100%;background:var(--bg);border:1px solid var(--line);color:var(--ink);padding:12px;border-radius:6px;font-size:14px}dl{padding:18px;background:var(--bg);border-radius:8px;overflow-wrap:anywhere}dt{font-size:12px;color:var(--muted);margin-top:12px}dd{margin:0;font:14px monospace}footer{max-width:850px;margin:40px 0 20px;font-size:13px}footer>span{color:var(--accent);font:12px monospace;letter-spacing:2px}[hidden]{display:none!important}@media(max-width:600px){header,main{padding:20px}.tag{font-size:10px}.intro{padding-top:25px}.panel{padding:20px}.panel-head{display:block}#badge{display:block;margin-bottom:15px}.explanation{grid-template-columns:1fr;gap:20px}h1{letter-spacing:-1px}button{width:100%}.lead{font-size:18px}}