:root{color-scheme:light;--paper:#f7f5f0;--panel:#fffdf9;--ink:#1d2430;--muted:#596475;--line:#d8d3c9;--accent:#3657b7;--accent-soft:#e8edff;--ok:#176b43;--error:#a6283e}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 15% 5%,#e7ecff 0,transparent 38%),var(--paper);color:var(--ink);font:16px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif;display:grid;place-items:center;padding:1.25rem}.test-environment{--paper:#fff5dd;--panel:#fffaf0;--accent:#9a4d00;--accent-soft:#ffe2b8}.card{width:min(100%,37rem);background:color-mix(in srgb,var(--panel) 94%,transparent);border:1px solid var(--line);border-radius:20px;padding:clamp(1.4rem,5vw,3rem);box-shadow:0 18px 55px #2431581c}.eyebrow{color:var(--accent);font:700 .75rem ui-monospace,SFMono-Regular,monospace;letter-spacing:.14em}.test-banner{border:2px solid #9a4d00;background:#ffe2b8;color:#6b3100;border-radius:10px;padding:.7rem .85rem;font-weight:800;letter-spacing:.04em}h1{margin:.4rem 0 1rem;font-size:clamp(1.8rem,6vw,2.6rem);line-height:1.1;letter-spacing:-.03em}h2{font-size:1.25rem;margin-bottom:.35rem}.intro,.help,.privacy{color:var(--muted)}.intro{max-width:34rem}.privacy{font-size:.85rem;margin-top:2rem}label{display:block;font-weight:700;margin:1.5rem 0 .5rem}.key-row{display:flex;gap:.55rem;min-width:0}.key-row input{min-width:0;flex:1}input{width:100%;padding:.82rem .9rem;border-radius:10px;border:1px solid #a9aeb8;background:#fff;color:var(--ink);font:1rem ui-monospace,SFMono-Regular,monospace}button,.download{border-radius:10px;padding:.78rem 1rem;font:700 1rem system-ui,sans-serif;cursor:pointer;transition:box-shadow .15s,background .15s}.primary{display:block;margin-top:1.2rem;border:1px solid var(--accent);background:var(--accent);color:white}.secondary{border:1px solid var(--line);background:#f2f0ea;color:var(--ink);white-space:nowrap}.download{display:inline-flex;gap:.55rem;align-items:center;background:var(--accent-soft);color:#233d91;border:1px solid #b8c5f6;text-decoration:none;margin:.45rem 0 1rem}.primary:disabled{opacity:.6;cursor:wait}button:focus-visible,.download:focus-visible,input:focus-visible{outline:3px solid #8ca5ff;outline-offset:2px}.status{min-height:1.5rem;margin-top:1.25rem}.status.error{color:var(--error)}.status.ok{color:var(--ok)}code{font-family:ui-monospace,SFMono-Regular,monospace}li{margin:.7rem 0;line-height:1.45}@media(max-width:420px){body{padding:.75rem}.card{padding:1.25rem;border-radius:15px}.key-row{align-items:stretch}.secondary{padding-inline:.75rem}}