*{box-sizing:border-box}body{margin:0;font-family:-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
font-size:15px;color:#1f2733;background:#f1f3f6;line-height:1.55}
a{color:#1a5fb4}
.topbar{background:#0f2038;color:#fff;padding:10px 18px;display:flex;align-items:center;gap:14px;
border-bottom:3px solid #b8933f;position:sticky;top:0;z-index:5}
.topbar .brand{font-weight:600;letter-spacing:.4px}.topbar .brand span{color:#b8933f}
.topbar .who{margin-left:auto;font-size:13px;color:#a9b8cd}
.shell{display:flex;min-height:calc(100vh - 47px)}
.side{width:190px;background:#e7eaf0;border-right:1px solid #d3d9e3;padding:16px 0;flex:0 0 190px}
.side a{display:block;padding:8px 20px;color:#31415a;text-decoration:none;font-size:14px}
.side a.on{background:#d5dce8;font-weight:600;border-left:3px solid #0f2038}
.side .count{color:#7a8798;font-size:12px}
.main{flex:1;min-width:0;padding:0}
.listhdr{padding:14px 22px;border-bottom:1px solid #dde1e8;background:#fff;font-weight:600}
ul.msgs{list-style:none;margin:0;padding:0;background:#fff}
ul.msgs li{border-bottom:1px solid #eceff4}
ul.msgs a{display:grid;grid-template-columns:190px 1fr 130px;gap:14px;padding:13px 22px;
text-decoration:none;color:#1f2733}
ul.msgs a:hover{background:#f6f8fb}
ul.msgs .from{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
ul.msgs .subj{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
ul.msgs .subj em{color:#6b788c;font-weight:400;font-style:normal}
ul.msgs .when{color:#7a8798;font-size:13px;text-align:right;white-space:nowrap}
ul.msgs li.unread .from,ul.msgs li.unread .subj{font-weight:700}
.msg{background:#fff;padding:24px 30px 60px;max-width:900px}
.msg h1{font-size:21px;margin:0 0 16px;font-weight:600}
.hdrs{border:1px solid #e3e7ee;border-radius:5px;background:#fafbfd;padding:14px 18px;font-size:14px;margin-bottom:22px}
.hdrs div{display:grid;grid-template-columns:96px 1fr;gap:10px;padding:2px 0}
.hdrs .k{color:#7a8798}
.body{font-size:15px}
.body p{margin:12px 0}
.actions{margin-top:26px;padding-top:16px;border-top:1px solid #eceff4;font-size:14px}
.back{display:inline-block;margin-bottom:16px;font-size:14px;text-decoration:none}
pre.src{background:#161b22;color:#d7e0ea;padding:20px;border-radius:6px;overflow-x:auto;
font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12.5px;line-height:1.65;
white-space:pre;margin:0}
.sim{background:#7a1f1f;color:#fff;padding:11px 18px;font-size:13.5px;font-weight:600}
.note{background:#fff8e6;border:1px solid #e6d7a4;padding:12px 16px;border-radius:5px;font-size:14px;margin:16px 0}
table.tick{border-collapse:collapse;width:100%;font-size:14px;margin:14px 0}
table.tick th,table.tick td{border-bottom:1px solid #e3e7ee;padding:9px 12px;text-align:left}
table.tick th{background:#eef1f6}
code{background:#eef1f5;padding:2px 6px;border-radius:3px;font-size:13.5px}
.signin{max-width:400px;margin:70px auto;background:#fff;border:1px solid #dfe3ea;border-radius:8px;padding:34px}
.signin h2{margin:0 0 6px;font-size:20px;font-weight:600}
.signin p{color:#6b788c;font-size:14px;margin:0 0 22px}
.signin label{display:block;font-size:13px;color:#5b6a80;margin:14px 0 5px}
.signin input{width:100%;padding:10px 12px;border:1px solid #cfd6e0;border-radius:4px;font-size:15px}
.signin button{width:100%;margin-top:20px;padding:11px;background:#0f2038;color:#fff;border:0;
border-radius:4px;font-size:15px;font-weight:600;cursor:pointer}