:root{--text:#111;--muted:#666;--soft:#f6f6f6;--border:#d8d8d8;--border-strong:#bdbdbd;--focus:#0969da;--error:#cf222e;--black:#000;--white:#fff;--mono:ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;--sans:Inter, ui-sans-serif, system-ui, "Segoe UI", Roboto, sans-serif;color:var(--text);background:var(--white);font:15px/1.45 var(--sans);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{min-width:320px;margin:0;overflow-x:hidden}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}#app{width:100%;min-height:100svh;overflow-x:hidden}.verification-shell{background:var(--white);grid-template-columns:minmax(0,1fr) minmax(0,1fr);width:100%;max-width:100vw;min-height:100svh;display:grid;overflow-x:hidden}.visual-panel,.form-card,.sign-card{position:relative}.visual-panel{min-height:100svh;color:var(--white);background-position:50%;background-size:cover;align-content:start;padding:78px clamp(36px,7vw,150px);display:grid;overflow:hidden}.visual-panel h1{max-width:520px;color:var(--white);letter-spacing:0;text-shadow:0 2px 18px #00000047;margin:0;font-size:40px;font-weight:700;line-height:1.08}.visual-panel p{color:#ffffffe6;text-shadow:0 2px 14px #0000003d;margin:16px 0 0;font-size:16px}.form-panel{align-content:center;gap:28px;min-width:0;min-height:100svh;padding:72px clamp(28px,7vw,150px);display:grid}.form-card,.sign-card{gap:18px;width:100%;min-width:0;max-width:520px;display:grid}.section-number{color:var(--border-strong);font-family:var(--mono);font-size:13px;line-height:1;position:absolute;top:0;right:0}.visual-panel .section-number{color:#ffffffc7;text-shadow:0 2px 12px #0000003d;top:28px;right:28px}h2{color:var(--text);letter-spacing:0;margin:0;font-size:24px;font-weight:700;line-height:1.2}.card-head{justify-content:space-between;align-items:center;gap:18px;padding-right:38px;display:flex}.field,.field-row{gap:7px;display:grid}.field span,.challenge-box>span{color:var(--text);font-size:14px;font-weight:600}.field small,.challenge-box small{color:var(--muted);font-size:12px;line-height:1.4}.field small.error{color:var(--error)}.field-row{grid-template-columns:minmax(0,1fr) 128px}input,select,textarea{border:1px solid var(--border);width:100%;min-width:0;color:var(--text);background:var(--white);border-radius:6px;outline:none;transition:border-color .16s,box-shadow .16s}input,select{min-height:40px;padding:0 12px}textarea{resize:vertical;min-height:112px;padding:12px}input:focus,select:focus,textarea:focus{border-color:var(--focus);box-shadow:0 0 0 2px #0969da33}input.invalid,textarea.invalid{border-color:var(--error)}input.invalid:focus,textarea.invalid:focus{box-shadow:0 0 0 2px #cf222e29}.primary-button,.secondary-button,.copy-button{border:1px solid var(--black);border-radius:6px;min-height:40px;font-weight:700}.primary-button{color:var(--white);background:var(--black)}.primary-button.success{background:#1f883d;border-color:#1f883d}.wide-button{width:100%}.secondary-button,.copy-button{color:var(--text);background:var(--white)}.copy-button{background:var(--white);opacity:.92;border-color:#e5e7eb;place-items:center;width:34px;min-height:30px;padding:0;transition:width .16s,background-color .16s,border-color .16s;display:inline-grid;position:absolute;top:6px;right:6px;overflow:hidden}.copy-button img{color:#6b7280;width:15px;height:15px}.copy-button span{opacity:0;color:#1f883d;font-size:12px;font-weight:600;transition:opacity .16s,transform .16s;position:absolute;transform:translateY(8px)}.copy-button.copied img{opacity:0}.copy-button.copied{background:#dafbe1;border-color:#aceebb;width:62px}.copy-button.copied span{opacity:1;transform:translateY(0)}.status-line{color:var(--muted);white-space:nowrap;font-size:13px}.status-line.error{color:var(--error)}pre,code{border:1px solid var(--border);max-width:100%;color:var(--text);background:var(--soft);font:13px/1.55 var(--mono);white-space:pre-wrap;word-break:break-all;border-radius:6px;margin:0;overflow:auto}pre{max-height:116px;padding:11px}code{white-space:pre;word-break:normal;min-height:44px;padding:11px 48px 10px 11px;display:block}.challenge-box{gap:8px;min-width:0;display:grid}.code-wrapper{min-width:0;max-width:100%;position:relative;overflow:hidden}.action-row{justify-content:flex-end;gap:10px;display:flex}.action-row .primary-button,.action-row .secondary-button{padding-inline:18px}@media (width<=820px){.verification-shell{grid-template-columns:1fr}.visual-panel{background-position:top;min-height:220px;padding:34px 24px 0}.visual-panel h1{font-size:32px}.visual-panel p{margin-top:10px;font-size:14px}.form-panel{align-content:start;min-height:auto;padding:30px 18px 42px}.form-card,.sign-card{max-width:none}.field-row{grid-template-columns:1fr}code{font-size:12px}.action-row{flex-direction:column}}