:root{--bg: #0b0e14;--panel: #131722;--panel-2: #1b2130;--text: #e6e6e6;--muted: #8a93a6;--accent: #4ea1ff;--danger: #ff6b6b;--in: #232a3a;--out: #1f3a5f;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}main{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}.card{width:100%;max-width:460px;background:var(--panel);border:1px solid #222b3d;border-radius:14px;padding:24px;box-shadow:0 10px 40px #0006}h1{margin:0;letter-spacing:4px}.logo{font-size:2.4rem;font-weight:800;letter-spacing:6px;text-align:center;background:linear-gradient(90deg,var(--accent),#9b8cff);-webkit-background-clip:text;background-clip:text;color:transparent}h2{font-size:.95rem;color:var(--muted);text-transform:uppercase;letter-spacing:1px;margin:18px 0 8px}.brandbar{border-bottom:1px solid #222b3d;padding-bottom:10px;margin-bottom:4px}.logo-sm{font-weight:800;font-size:1.1rem;letter-spacing:3px;background:linear-gradient(90deg,var(--accent),#9b8cff);-webkit-background-clip:text;background-clip:text;color:transparent}.tagline{text-align:center;font-size:1.15rem;color:var(--text);margin:10px 0 2px}.descriptor{text-align:center;color:var(--muted);font-size:.85rem;margin:0}.byline{text-align:center;color:var(--muted);opacity:.5;font-size:.75rem;margin-top:16px}.tabs{display:flex;gap:8px;margin:16px 0}.tabs button{flex:1;background:var(--panel-2);color:var(--muted);border:1px solid #2a3344}.tabs button.active{color:var(--text);border-color:var(--accent)}input{width:100%;padding:12px;margin:6px 0;background:var(--panel-2);border:1px solid #2a3344;border-radius:8px;color:var(--text);font-size:1rem}input:focus{outline:none;border-color:var(--accent)}button{padding:12px 16px;border-radius:8px;border:1px solid #2a3344;background:var(--accent);color:#04101f;font-weight:600;cursor:pointer}button:disabled{opacity:.5;cursor:default}button.link{background:none;border:none;color:var(--muted);padding:0;font-weight:400;text-decoration:underline}.row{display:flex;align-items:center}.between{justify-content:space-between}.mycode,.sas-code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:1.3rem;letter-spacing:2px;color:var(--accent)}.hint,.disclaimer,.sas-help{color:var(--muted);font-size:.85rem;line-height:1.4}.disclaimer{margin-top:18px;border-top:1px solid #222b3d;padding-top:12px}.notice{background:var(--panel-2);padding:12px;border-radius:8px;font-size:.9rem}.error{color:var(--danger);font-size:.9rem}.chat{max-width:560px;display:flex;flex-direction:column;height:80vh}.sas{display:flex;flex-direction:column;gap:2px;background:var(--panel-2);border:1px solid #2a3344;border-radius:8px;padding:10px 12px;margin-bottom:10px}.sas.pending{border-color:var(--accent)}.sas.ok{opacity:.7}.sas-confirm{margin-top:8px;align-self:flex-start;font-size:.85rem;padding:8px 12px}.sas-label{font-size:.7rem;text-transform:uppercase;letter-spacing:1px;color:var(--muted)}.messages{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:8px;padding:8px 2px}.empty{color:var(--muted);text-align:center;margin:auto}.bubble{max-width:78%;padding:8px 12px;border-radius:12px;display:flex;align-items:baseline;gap:10px}.bubble.in{align-self:flex-start;background:var(--in)}.bubble.out{align-self:flex-end;background:var(--out)}.bubble-text{word-break:break-word}.bubble-timer{font-size:.7rem;color:var(--muted);font-variant-numeric:tabular-nums;flex-shrink:0}.composer{display:flex;gap:8px;margin-top:8px}.composer input{margin:0}