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.brand{font-weight:600;letter-spacing:-.01em}.site-header .spacer{flex:1}.site-header .greeting{color:var(--text);font-weight:600;font-size:.9375rem;white-space:nowrap}button,.btn{font:inherit;padding:8px 14px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface-alt);color:var(--text);cursor:pointer;transition:background-color .15s}button:hover:not(:disabled){background:var(--border)}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px}button:disabled{opacity:.5;cursor:not-allowed}button.primary{background:var(--accent);border-color:var(--accent);color:#fff}button.primary:hover:not(:disabled){filter:brightness(1.1)}button.danger{color:var(--danger)}input,select,textarea{font:inherit;width:100%;padding:9px 12px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg);color:var(--text)}label{display:block;margin-bottom:6px;color:var(--text-muted);font-size:.875rem}.field{margin-bottom:16px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.stack>*+*{margin-top:12px}.row{display:flex;align-items:center;gap:12px}.muted{color:var(--text-muted)}.small{font-size:.875rem}.error{color:var(--danger)}.ok{color:var(--success)}.center{max-width:420px;margin:48px auto}.token-display{font-family:ui-monospace,SF Mono,Menlo,Consolas,monospace;font-size:1.125rem;letter-spacing:.06em;word-break:break-all;background:var(--bg);border:1px solid var(--accent);border-radius:var(--radius);padding:16px;margin:12px 0}.conv-item{display:flex;align-items:center;gap:12px;width:100%;text-align:left;padding:14px 16px}.conv-item .peer{font-weight:600}.empty{text-align:center;padding:48px 16px;color:var(--text-muted)}.site-footer{display:flex;align-items:center;justify-content:center;text-align:center;gap:8px;padding:14px 20px;background:var(--surface);border-top:1px solid var(--border);font-size:.8125rem;line-height:1;flex-wrap:wrap}.site-foot-brand{color:var(--text);font-weight:600}.site-foot-meta,.site-foot-tagline{color:var(--text-muted)}.site-foot-divider{width:1px;height:14px;background:var(--border);margin:0 6px}@media(max-width:480px){.site-footer{gap:2px 8px;font-size:.75rem}.site-foot-divider{display:none}.site-foot-tagline{flex-basis:100%}.site-header{padding:10px 12px;gap:8px}.site-header .greeting{font-size:.8125rem}.brand-icon{height:20px}}.message-pane{display:flex;flex-direction:column;gap:10px;min-height:320px;max-height:60vh;overflow-y:auto}.bubble-row{display:flex}.bubble-row.mine{justify-content:flex-end}.bubble{max-width:72%;padding:10px 14px;border-radius:var(--radius);background:var(--surface-alt);border:1px solid var(--border);word-break:break-word}.bubble-row.mine .bubble{background:var(--accent);border-color:var(--accent);color:#fff}.bubble .stamp{display:block;margin-top:4px;font-size:.6875rem;opacity:.7}.conv-item{cursor:pointer}.conv-item:hover{background:var(--surface-alt)}.brand{display:inline-flex;align-items:center;gap:8px}.brand-button{background:none;border:none;padding:0;cursor:pointer;font:inherit;font-weight:600;letter-spacing:-.01em;color:var(--text)}.brand-button:hover{background:none;opacity:.8}.brand-icon{height:22px;width:auto;display:block}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px}.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px 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