:root{--bg:#f6f8fc;--card:#fff;--line:#e0e3e7;--text:#1f1f1f;--muted:#5f6368;--accent:#0b57d0;--sel:#d3e3fd;--unread:#fff}
*{box-sizing:border-box}
body{margin:0;font:14px/1.4 "Google Sans",Roboto,system-ui,-apple-system,Segoe UI,sans-serif;color:var(--text);background:var(--bg)}
.hidden{display:none!important}.grow{flex:1}.muted{color:var(--muted)}.err{color:#b3261e;margin-top:8px;min-height:18px}
.center{min-height:100vh;display:flex;align-items:center;justify-content:center}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px}
.login{width:340px;display:flex;flex-direction:column;gap:10px}.login h1{margin:0;font-size:24px}
input{font:inherit;border:1px solid var(--line);border-radius:8px;padding:10px 12px;background:#fff;color:inherit}
button{font:inherit;cursor:pointer}
button.primary{background:var(--accent);color:#fff;border:0;border-radius:20px;padding:10px 18px}
button.icon{background:none;border:0;border-radius:50%;width:36px;height:36px;font-size:18px;color:var(--muted)}
button.icon:hover{background:#0001}button.icon:disabled{opacity:.3;cursor:default}
.link{background:none;border:0;color:var(--accent);cursor:pointer;text-decoration:none;padding:6px 8px}
.top{display:flex;align-items:center;gap:12px;height:64px;padding:0 16px;background:var(--bg)}
.logo{font-size:20px;color:var(--text);text-decoration:none;white-space:nowrap;display:flex;align-items:center;gap:10px}
.logoimg{height:46px;width:auto;display:block}.loginlogo{width:200px;max-width:100%;align-self:center;margin-bottom:4px}
.searchbox{display:flex;align-items:center;background:#eaf1fb;border-radius:24px;padding:0 6px 0 16px;flex:1;max-width:720px}
.searchbox input{flex:1;border:0;background:none;outline:none;height:46px;padding:0}
.searchbox button{background:none;border:0;font-size:16px;padding:8px 12px;color:var(--muted)}
.searchbox.big{max-width:640px;margin:0 auto 28px}
.pickerMain{max-width:980px;margin:0 auto;padding:24px 16px;text-align:center}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;text-align:left}
.cards a{display:block;text-decoration:none;color:inherit;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px}
.cards a:hover{box-shadow:0 1px 6px #0003}
.cards b{display:block;word-break:break-all;font-size:15px;margin-bottom:6px}
.layout{display:flex;height:calc(100vh - 64px)}
#side{width:256px;padding:8px 12px;overflow:auto;flex:none}
.navhead{margin:14px 12px 4px;font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.navitem{display:flex;justify-content:space-between;gap:8px;padding:6px 14px;border-radius:0 16px 16px 0;margin-left:-12px;padding-left:26px;color:var(--text);text-decoration:none;word-break:break-all}
.navitem:hover{background:#0000000d}.navitem.active{background:var(--sel);font-weight:600}
.navitem small{color:var(--muted);font-weight:400}
.navitem.sub{padding-left:44px;font-size:13px}
#listPane,#readPane{flex:1;background:var(--card);border-radius:16px 16px 0 0;overflow:auto;min-width:0}
.toolbar{display:flex;align-items:center;gap:4px;padding:6px 12px;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--card);z-index:1}
.row{display:flex;gap:12px;padding:8px 16px;border-bottom:1px solid #eee;cursor:pointer;align-items:baseline}
.row:hover{box-shadow:inset 1px 0 0 #dadce0,inset -1px 0 0 #dadce0,0 1px 2px #3c40434d;z-index:1;position:relative}
.row .from{width:200px;flex:none;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.row .subj{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.row .subj .snip{color:var(--muted)}
.row .date{flex:none;font-size:12px;color:var(--muted);white-space:nowrap}
.row .mb{font-size:11px;background:#eef;border-radius:4px;padding:0 5px;margin-right:6px;color:#446}
.empty{padding:40px;text-align:center;color:var(--muted)}
#msg{padding:20px 28px;max-width:1000px}
#msg h2{font-weight:400;font-size:22px;margin:0 0 16px}
.meta{border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:16px;color:var(--muted);font-size:13px}.meta b{color:var(--text)}
.atts{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.att{border:1px solid var(--line);border-radius:8px;padding:6px 10px;text-decoration:none;color:var(--text);font-size:13px}
.att:hover{background:#0000000d}
pre.text{white-space:pre-wrap;word-wrap:break-word;font:inherit}
iframe.html{width:100%;border:0;min-height:300px;background:#fff}
.tabs{display:flex;gap:8px;margin-bottom:10px}.tabs button{border:1px solid var(--line);background:#fff;border-radius:16px;padding:3px 12px}.tabs .on{background:var(--sel)}
.tabs{display:flex;gap:2px;margin-left:12px}
.tabs a{padding:8px 14px;border-radius:18px;color:var(--text);text-decoration:none;font-size:14px;white-space:nowrap}
.tabs a:hover{background:#0000000d}.tabs a.on{background:var(--sel);font-weight:600}
#viewMain{height:calc(100vh - 64px);overflow:auto;background:var(--card);border-radius:16px 16px 0 0;margin:0 8px}
@media(max-width:800px){.tabs a{padding:6px 8px;font-size:13px}}
@media(max-width:800px){#side{display:none}#side.open{display:block;position:fixed;z-index:5;background:var(--bg);top:64px;bottom:0}.row .from{width:110px}.top .muted{display:none}}

.cnt{font-size:11px;color:var(--muted);margin-left:4px}
.thr{border:1px solid var(--line);border-radius:10px;margin-bottom:14px;font-size:13px}
.thr summary{cursor:pointer;padding:8px 12px;color:var(--muted)}
.thrrow{display:flex;gap:12px;padding:6px 12px;border-top:1px solid #eee;color:inherit;text-decoration:none}
.thrrow:hover{background:#0000000a}.thrrow.cur{background:var(--sel);font-weight:600}
.thrrow .from{width:160px;flex:none;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.thrrow .subj{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted)}
.thrrow .date{flex:none;color:var(--muted);font-size:12px}