:root{color-scheme:light;--ink:#202c36;--muted:#65727d;--accent:#235b42;--line:#e1e7e2;--paper:#fff;font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:#f2f5f1}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 10% 0,#e2ecdf 0,transparent 55%)}.shell{width:min(100% - 32px,600px);margin:0 auto;padding:28px 0 max(32px,env(safe-area-inset-bottom))}.brand{display:flex;align-items:center;gap:12px}.brand img{border-radius:14px}.brand div{display:grid;gap:2px;font-weight:650}.brand small{font-size:12px;font-weight:400;color:var(--muted)}.intro{padding:32px 4px 23px}h1{font-size:32px;letter-spacing:-.04em;line-height:1.3;margin:10px 0 12px}h2{font-size:18px;margin:0;line-height:1.5}p{font-size:14px;line-height:1.75;margin:8px 0;color:var(--muted)}.panel{background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:24px;margin:0 0 16px;box-shadow:0 5px 20px #21392604}.section-heading{display:flex;gap:12px;align-items:center;margin-bottom:22px}.section-heading p{font-size:12px;margin:2px 0 0}.step{display:grid;place-items:center;background:#ecf3ed;color:var(--accent);border-radius:10px;width:34px;height:34px;font-weight:750;flex-shrink:0}fieldset{border:0;padding:0;margin:0;min-width:0}label{display:block;font-size:13px;font-weight:650;margin:0 0 8px}input[type=password],input[type=text]{display:block;width:100%;min-width:0;height:48px;border:1px solid #d8e1da;background:#fcfdfb;border-radius:11px;font:14px ui-monospace,monospace;padding:0 13px;margin-bottom:20px;color:var(--ink)}input::placeholder{font:13px system-ui;color:#879389}input:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #72ab8f;outline-offset:3px}.check-line{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:12px;font-weight:400;margin-top:-5px;margin-bottom:18px}input[type=checkbox],input[type=radio]{accent-color:var(--accent);width:17px;height:17px;flex-shrink:0}button{min-height:46px;border-radius:11px;border:1px solid transparent;padding:10px 16px;font:600 14px system-ui;cursor:pointer;touch-action:manipulation;transition:background .15s}.primary{background:var(--accent);color:#fff;width:100%}.primary:hover:not(:disabled){background:#194632}.secondary{background:#f1f4f0;border-color:var(--line);color:var(--ink)}button:disabled{opacity:.55;cursor:not-allowed}.quiet{font-size:12px;margin:14px 0 0}.device{display:flex;gap:10px;align-items:flex-start;background:#f9fbf8;border:1px solid var(--line);padding:14px 12px;border-radius:11px;margin-bottom:10px;cursor:pointer}.device:has(input:checked){border-color:var(--accent);background:#eff6ef}.device .name{display:block;overflow-wrap:anywhere;line-height:1.6}.device small{display:block;font-weight:400;color:var(--muted);margin-top:5px;line-height:1.6;overflow-wrap:anywhere}#redeem_button{margin-top:18px}.feedback{background:#fff3e6;border:1px solid #f0dcc1;padding:15px 17px;border-radius:12px;color:#76512a;overflow-wrap:anywhere}.result{text-align:center}.result-mark{display:inline-grid;place-items:center;border-radius:50%;width:42px;height:42px;background:#e5f2e9;color:var(--accent);font-size:24px;margin-bottom:12px}.result button{margin-top:12px}footer{padding:4px 6px;color:var(--muted);font-size:12px}summary{cursor:pointer;padding:10px 0}ul{padding-left:18px;line-height:1.9;margin:5px 0}li{margin:7px 0}dialog{width:min(100% - 32px,430px);padding:25px;border:1px solid var(--line);border-radius:20px;color:var(--ink)}dialog::backdrop{background:#1b292b70;backdrop-filter:blur(3px)}dialog p{margin:12px 0 20px;white-space:pre-line;overflow-wrap:anywhere}.dialog-actions{display:flex;gap:10px}.dialog-actions button{flex:1;width:auto}[hidden]{display:none!important}@media(max-width:380px){.shell{width:calc(100% - 24px);padding-top:18px}.panel{padding:19px}h1{font-size:28px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}