:root{--bg:#f6f7f9;--panel:#fff;--text:#1d2129;--muted:#6b7280;--line:#e5e7eb;--accent:#2563eb;--accent-text:#fff;--hover:#f1f5f9;--unread:#111827;--danger:#b91c1c;--warn-bg:#fef3c7;--warn:#92400e;--flash-bg:#ecfdf5;--flash:#065f46;--active:#e0e7ff}
@media (prefers-color-scheme:dark){:root{--bg:#0f1115;--panel:#171a21;--text:#e5e7eb;--muted:#9ca3af;--line:#2a2f3a;--accent:#3b82f6;--hover:#1f2430;--unread:#fff;--danger:#f87171;--warn-bg:#3b2f0b;--warn:#fcd34d;--flash-bg:#052e22;--flash:#6ee7b7;--active:#1e2a4a}}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--text);font:14px/1.45 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
h1{font-size:18px;margin:0}
.muted{color:var(--muted)}
.brand{font-weight:700;letter-spacing:-.02em;font-size:18px}
.brand.big{font-size:24px;margin-bottom:8px}
.btn,button{font:inherit;border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:6px;padding:6px 12px;cursor:pointer;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.btn:hover,button:hover{background:var(--hover);text-decoration:none}
.btn.primary,button.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-text)}
.btn.primary:hover{filter:brightness(1.08);background:var(--accent)}
.btn.danger{color:var(--danger)}
button:disabled{opacity:.5;cursor:default}
button.link{border:0;background:none;padding:0;color:var(--accent)}
input,textarea{font:inherit;color:var(--text);background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:8px 10px;width:100%}
input:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:-1px}
.app{display:grid;grid-template-columns:220px 1fr;min-height:100vh}
.side{background:var(--panel);border-right:1px solid var(--line);padding:16px;display:flex;flex-direction:column;gap:14px;position:sticky;top:0;height:100vh}
.side nav{display:flex;flex-direction:column;gap:2px}
.side nav a{color:var(--text);padding:7px 10px;border-radius:6px;display:flex;justify-content:space-between}
.side nav a:hover{background:var(--hover);text-decoration:none}
.side nav a.active{background:var(--active);font-weight:600}
.count{background:var(--accent);color:var(--accent-text);border-radius:10px;padding:0 7px;font-size:12px;font-weight:600}
.compose-btn{justify-content:center}
.me{margin-top:auto;font-size:12px;color:var(--muted);display:flex;flex-direction:column;gap:4px}
.me .who{overflow:hidden;text-overflow:ellipsis}
.main{padding:16px 24px;min-width:0}
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.actions{display:flex;gap:6px;flex-wrap:wrap}
form.inline{display:contents}
.flash{background:var(--flash-bg);color:var(--flash);padding:8px 12px;border-radius:6px;margin-bottom:12px}
.error{background:#fee2e2;color:#991b1b;padding:8px 12px;border-radius:6px;margin-bottom:12px}
.warn{background:var(--warn-bg);color:var(--warn);padding:8px 12px;border-radius:6px;margin:8px 0}
.note{color:var(--muted);font-size:13px;margin:8px 0}
.list{list-style:none;margin:0;padding:0;background:var(--panel);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.list li{display:flex;align-items:center;border-bottom:1px solid var(--line)}
.list li:last-child{border-bottom:0}
.list li:hover{background:var(--hover)}
.list input[type=checkbox]{width:auto;margin:0 4px 0 14px}
.list a{flex:1;min-width:0;display:grid;grid-template-columns:200px 1fr auto auto;gap:12px;align-items:center;padding:10px 14px 10px 8px;color:var(--text)}
.list a:hover{text-decoration:none}
.list .from,.list .subj{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.list .snip{color:var(--muted)}
.list time{color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}
.list .clip{color:var(--muted);display:flex}
.list li.unread .from,.list li.unread .s,.list li.unread time{font-weight:700;color:var(--unread)}
.empty{color:var(--muted);padding:40px 0;text-align:center}
.pager{display:flex;gap:16px;justify-content:flex-end;padding:12px 4px}
.msg .subject{font-size:22px;margin:4px 0 12px}
.meta{display:grid;grid-template-columns:auto 1fr;gap:2px 12px;margin:0 0 12px;font-size:13px}
.meta dt{color:var(--muted)}
.meta dd{margin:0;word-break:break-word}
.files{list-style:none;padding:0;margin:0 0 12px;display:flex;flex-wrap:wrap;gap:8px}
.files li{border:1px solid var(--line);border-radius:6px;padding:6px 10px;background:var(--panel)}
.withheld{color:var(--danger)}
iframe.body{width:100%;min-height:200px;border:1px solid var(--line);border-radius:8px;background:#fff;display:block}
pre.text{white-space:pre-wrap;word-wrap:break-word;font:14px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:16px;margin:0}
.foot{margin-top:12px;font-size:12px}
.compose .fields{display:flex;flex-direction:column;gap:6px;margin-bottom:8px}
.compose label{display:grid;grid-template-columns:70px 1fr;align-items:center;gap:8px}
.compose label span{color:var(--muted);font-size:13px}
.compose textarea{min-height:300px;resize:vertical;font:14px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace}
.attach{margin:10px 0;display:flex;flex-direction:column;gap:6px;align-items:flex-start}
.attach ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:4px}
.attach li label{display:flex;gap:6px;align-items:center}
.attach li input[type=checkbox]{width:auto}
.attach .btn{cursor:pointer}
.send{display:flex;gap:12px;align-items:center}
.center{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:28px;width:100%;max-width:400px}
.card h1{margin:8px 0}
.stack{display:flex;flex-direction:column;gap:10px;margin-top:12px}
.stack .btn{justify-content:center}
@media (max-width:760px){
 .app{grid-template-columns:1fr}
 .side{position:static;height:auto;flex-direction:row;flex-wrap:wrap;align-items:center;border-right:0;border-bottom:1px solid var(--line);padding:10px 16px;gap:10px}
 .side nav{flex-direction:row;overflow-x:auto;width:100%;order:3}
 .side nav a{white-space:nowrap}
 .me{margin:0 0 0 auto;flex-direction:row;align-items:center;gap:8px}
 .me .who{display:none}
 .main{padding:12px 16px}
 .list a{grid-template-columns:1fr auto;grid-template-rows:auto auto;row-gap:2px}
 .list .from{grid-column:1}
 .list time{grid-column:2;grid-row:1}
 .list .subj{grid-column:1/3}
 .list .clip{display:none}
 .compose label{grid-template-columns:56px 1fr}
}