:root{--navy:#14315c;--navy2:#1b3a6b;--accent:#c9a227;--ink:#16213a;--muted:#5a6480;
 --line:#e2e7f0;--bg:#fff;--soft:#f5f7fb}
*{box-sizing:border-box}
body{margin:0;background:var(--soft);color:var(--ink);
 font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif}
a{color:var(--navy2)}
.shell{max-width:1180px;margin:0 auto;padding:0 16px}
.center{min-height:78vh;display:grid;place-items:center;padding:40px 16px}
.box{background:#fff;border:1px solid var(--line);border-radius:14px}
.loginbox{padding:34px;max-width:410px;width:100%;text-align:center}
.mark{width:52px;height:52px;border-radius:10px;background:var(--navy);color:#fff;
 display:grid;place-items:center;font:700 26px Georgia,serif;margin:0 auto 16px}
h1{font:600 20px/1.3 Georgia,serif;margin:0 0 6px}
h2{font:600 19px/1.3 Georgia,serif;margin:0 0 16px}
.sub{color:var(--muted);font-size:14px;margin:0 0 22px}
.hint{margin-top:18px;font-size:12.5px;color:var(--muted)}
.err{background:#fdecea;border:1px solid #f5c2bc;color:#8a2318;border-radius:8px;
 padding:11px 14px;font-size:13.5px;margin-bottom:18px;text-align:left}
.top{background:var(--navy);color:#fff}
.topin{display:flex;align-items:center;justify-content:space-between;gap:14px;
 padding:12px 0;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-family:Georgia,serif}
.brand .mark{width:34px;height:34px;font-size:18px;margin:0;background:#fff;color:var(--navy)}
.who{font-size:13px;opacity:.85}
.who a,.who button{color:#fff}
.who button{background:none;border:0;text-decoration:underline;cursor:pointer;font:inherit;padding:0}
.tabs{display:flex;gap:2px;background:var(--navy2);overflow-x:auto}
.tabs a{color:rgba(255,255,255,.72);padding:12px 18px;font-size:14.5px;text-decoration:none;
 white-space:nowrap;border-bottom:3px solid transparent}
.tabs a.on{color:#fff;border-bottom-color:var(--accent)}
main{padding:24px 0 60px}
.tiles{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(215px,1fr))}
.tile{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;
 text-decoration:none;display:block;color:inherit}
.tile b{display:block;font-size:15px;margin-bottom:5px;color:var(--navy)}
.tile span{font-size:13.5px;color:var(--muted)}
.note{font-size:12.5px;color:var(--muted);margin-top:14px}
.pad{padding:20px}
.chat{display:flex;flex-direction:column;height:520px}
.log{flex:1;overflow:auto;padding:18px;display:flex;flex-direction:column;gap:12px}
.b{max-width:78%;padding:11px 14px;border-radius:12px;font-size:14.5px;white-space:pre-wrap}
.b.me{align-self:flex-end;background:var(--navy);color:#fff;border-bottom-right-radius:4px}
.b.bot{align-self:flex-start;background:var(--soft);border:1px solid var(--line);
 border-bottom-left-radius:4px}
.inputrow{display:flex;gap:8px;padding:12px 14px;border-top:1px solid var(--line)}
.inputrow input{flex:1;border:1px solid var(--line);border-radius:8px;padding:11px 13px;font-size:14.5px}
.btn{border:0;border-radius:8px;padding:10px 17px;font-size:14px;font-weight:600;cursor:pointer}
.btn-p{background:var(--navy);color:#fff}