:root { --fg:#1d2330; --muted:#6b7280; --line:#e5e7eb; --bg:#f6f7f9; --card:#fff; --accent:#2563eb; --danger:#dc2626; --ok:#047857; }
* { box-sizing: border-box; }
body { margin:0; font:14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif; color:var(--fg); background:var(--bg); }
a { color:var(--accent); text-decoration:none; }
a:hover { text-decoration:underline; }
code, pre, .code { font-family: ui-monospace,SFMono-Regular,Menlo,Consolas,monospace; }
header.top { display:flex; align-items:center; gap:12px; padding:10px 20px; background:#111827; color:#fff; flex-wrap:wrap; }
header.top .brand { color:#fff; font-weight:700; font-size:16px; }
header.top .tag { color:#9ca3af; font-size:12px; }
header.top nav { margin-left:auto; display:flex; align-items:center; gap:14px; }
header.top nav a { color:#e5e7eb; }
header.top .who { color:#9ca3af; }
main { max-width:1200px; margin:20px auto; padding:0 16px; }
.card { background:var(--card); border:1px solid var(--line); border-radius:8px; padding:16px 20px; margin-bottom:16px; overflow-x:auto; }
.card.narrow { max-width:420px; margin:60px auto; }
h1 { font-size:20px; margin:0 0 8px; }
h2 { font-size:16px; margin:20px 0 8px; }
.muted { color:var(--muted); }
.small { font-size:12px; }
.flash { padding:10px 14px; border-radius:6px; margin-bottom:12px; word-break:break-all; }
.flash.ok { background:#ecfdf5; color:var(--ok); border:1px solid #a7f3d0; }
.flash.err { background:#fef2f2; color:var(--danger); border:1px solid #fecaca; }
form.inline { display:inline; margin:0; }
form.row { display:flex; align-items:center; gap:8px; flex-wrap:wrap; margin:8px 0; }
form.stack { display:flex; flex-direction:column; gap:12px; }
form.stack label { display:flex; flex-direction:column; gap:4px; }
input { padding:6px 8px; border:1px solid #d1d5db; border-radius:6px; font:inherit; }
input.short { width:140px; }
input.num { width:80px; }
.prefix, .suffix, .label { color:var(--muted); font-family:ui-monospace,Menlo,monospace; }
button { padding:5px 12px; border:1px solid #d1d5db; border-radius:6px; background:#fff; font:inherit; cursor:pointer; }
button:hover { background:#f3f4f6; }
button.primary { background:var(--accent); color:#fff; border-color:var(--accent); }
button.danger { color:var(--danger); border-color:#fecaca; }
button.link { background:none; border:none; color:#e5e7eb; padding:0; }
button.copy { padding:1px 6px; font-size:12px; margin-left:4px; }
table.list { width:100%; border-collapse:collapse; }
table.list th, table.list td { text-align:left; padding:8px; border-bottom:1px solid var(--line); vertical-align:middle; }
table.list th { color:var(--muted); font-weight:500; font-size:12px; }
tr.unread td { font-weight:600; }
tr.disabled td { color:var(--muted); }
.code { display:inline-block; background:#eef2ff; color:#3730a3; padding:1px 6px; border-radius:4px; }
.code.best { background:#fef3c7; color:#92400e; font-weight:700; font-size:15px; }
dl.meta { display:grid; grid-template-columns:90px 1fr; gap:6px 12px; }
dl.meta dt { color:var(--muted); }
dl.meta dd { margin:0; word-break:break-all; }
pre.body { white-space:pre-wrap; word-break:break-word; background:#f9fafb; border:1px solid var(--line); padding:12px; border-radius:6px; max-height:600px; overflow:auto; }
iframe.mailhtml { width:100%; height:600px; border:1px solid var(--line); border-radius:6px; background:#fff; }