:root{--primary: #111111;--bg: #ffffff;--fg: #1a1a1a;--muted: color-mix(in srgb, var(--fg) 80%, var(--bg));--border: color-mix(in srgb, var(--fg) 18%, var(--bg));--on-primary: var(--bg);--error: #dc2626;--radius: 10px;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}@supports (font-variation-settings: normal){:root{font-family:Inter var,-apple-system,BlinkMacSystemFont,sans-serif}}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;background:var(--bg);color:var(--fg);font-size:17px;line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#app{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column}.progress{position:sticky;top:0;height:3px;background:#0000000f;z-index:10}.progress>.bar{height:100%;background:var(--primary);width:0%;transition:width .24s ease}.topbar{display:flex;align-items:center;gap:12px;padding:14px 20px}.topbar img{max-height:28px;max-width:140px}.back{background:none;border:0;font-size:22px;cursor:pointer;color:var(--muted);padding:4px 8px;border-radius:6px;line-height:1}.back:hover{background:#0000000d;color:var(--fg)}main{flex:1;display:flex;align-items:center;justify-content:center;padding:24px}.screen{width:100%;max-width:640px;display:flex;flex-direction:column;gap:18px;animation:slide-in .28s ease}@keyframes slide-in{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.q-num{font-size:13px;letter-spacing:.04em;color:var(--muted);text-transform:uppercase}h1,h2{font-weight:700;letter-spacing:-.02em;margin:0}h1{font-size:clamp(28px,5vw,40px)}h2{font-size:clamp(22px,3.4vw,28px)}p.lead{color:var(--muted);margin:0;font-size:16px}.error{color:var(--error);font-size:14px;min-height:1.2em}.welcome-logo img{max-height:64px;margin-bottom:8px}input[type=text],input[type=email],input[type=tel],input[type=date],textarea{width:100%;border:0;border-bottom:2px solid var(--border);background:transparent;font:inherit;padding:10px 4px;outline:none;color:var(--fg);transition:border-color .16s;resize:none}input[type=text]:focus,input[type=email]:focus,input[type=tel]:focus,input[type=date]:focus,textarea:focus{border-color:var(--primary)}input[type=date]{color-scheme:light dark}.subfields{display:flex;flex-direction:column;gap:18px}.subfield>span{display:block;font-size:14px;color:var(--muted)}textarea{min-height:96px}.choices{display:flex;flex-direction:column;gap:10px;margin-top:4px}.choice{display:flex;align-items:center;gap:12px;padding:12px 14px;border:1.5px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:border-color .14s,background .14s,transform 80ms;background:var(--bg);-webkit-user-select:none;user-select:none}.choice:hover{border-color:var(--primary)}.choice .key{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border:1.5px solid var(--border);border-radius:6px;font-size:12px;color:var(--muted);background:#00000005;flex-shrink:0}.choice.selected{border-color:var(--primary);background:color-mix(in srgb,var(--primary) 8%,transparent)}.choice.selected .key{background:var(--primary);color:var(--on-primary);border-color:var(--primary)}.choice input[type=checkbox],.choice input[type=radio]{display:none}.choice input[type=text].other-input{flex:1;border-bottom:0;padding:0;font-size:16px}.rating{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}.rating button{flex:1;min-width:44px;height:56px;border:1.5px solid var(--border);background:var(--bg);border-radius:10px;font-size:18px;font-weight:600;cursor:pointer;transition:border-color .14s,background .14s,color .14s;color:var(--fg)}.rating button:hover{border-color:var(--primary)}.rating button.selected{background:var(--primary);color:var(--on-primary);border-color:var(--primary)}.actions{display:flex;align-items:center;gap:16px;margin-top:8px}.btn-primary{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:0;background:var(--primary);color:var(--on-primary);font:inherit;font-weight:600;padding:12px 22px;border-radius:8px;cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:opacity .14s,transform 80ms}.btn-primary:hover{opacity:.92}.btn-primary:active{transform:scale(.98)}.btn-primary[disabled]{opacity:.4;cursor:not-allowed}.hint{color:var(--muted);font-size:13px}.kbd{display:inline-block;border:1px solid var(--border);background:#00000005;border-radius:4px;padding:1px 6px;font-size:12px;font-family:ui-monospace,SF Mono,Menlo,monospace}.required-mark{color:var(--primary);margin-left:4px}.submit-status{font-size:14px;color:var(--muted)}@media (max-width: 480px){main{padding:32px 16px 16px;align-items:flex-start}h1{font-size:26px}h2{font-size:20px}}.lead a,h1 a,h2 a{color:inherit;text-decoration:underline}