:root {
  --bg: #f4f5f7; --card: #fff; --text: #1d2330; --muted: #6b7280; --line: #e5e7eb;
  --primary: #2563eb; --primary-h: #1d4ed8; --danger: #dc2626; --ok: #16a34a; --unread: #eef4ff;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1218; --card: #181c25; --text: #e6e8ee; --muted: #9aa3b2; --line: #2a303c; --unread: #1b2640; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
main { max-width: 1100px; margin: 0 auto; padding: 16px; }
h1, h2 { margin: 0 0 12px; font-weight: 650; }
h2 { font-size: 1.2rem; }
.top { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px;
  padding: 10px 16px; background: var(--card); border-bottom: 1px solid var(--line); }
.top nav { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.brand { font-weight: 700; color: var(--text); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin-bottom: 16px; }
.muted { color: var(--muted); } .small { font-size: .85rem; } .nowrap { white-space: nowrap; }
.row { display: flex; align-items: center; } .between { justify-content: space-between; } .gap { gap: 8px; } .wrap { flex-wrap: wrap; gap: 8px; }
.right { text-align: right; } .hidden { display: none; } .inline { display: inline; }
input[type=text], input[type=password], input[type=search] {
  font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 7px; background: var(--bg); color: var(--text); width: 100%; }
button, .button { font: inherit; padding: 7px 14px; border-radius: 7px; border: 1px solid var(--line); background: var(--card); color: var(--text); cursor: pointer; display: inline-block; }
button:hover, .button:hover { border-color: var(--primary); text-decoration: none; }
button.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
button.primary:hover { background: var(--primary-h); }
button.danger { color: var(--danger); border-color: var(--danger); }
button.link { border: 0; background: none; padding: 0; color: var(--primary); }
.danger-text { color: var(--danger) !important; }
button.small { padding: 3px 10px; font-size: .85rem; }
button.wide { width: 100%; margin-top: 8px; }
button:disabled { opacity: .6; cursor: default; }
.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 12px; background: var(--unread); border: 1px solid var(--line); }
.flash.error { border-color: var(--danger); color: var(--danger); }
.flash.success { border-color: var(--ok); }
.login { max-width: 380px; margin: 10vh auto; }
.login label { display: block; margin: 10px 0; }
.login label input { margin-top: 4px; }
.newaddr { display: grid; grid-template-columns: 2fr 1.4fr auto; gap: 8px; }
.addr-input { display: flex; align-items: center; border: 1px solid var(--line); border-radius: 7px; background: var(--bg); }
.addr-input input { border: 0; background: transparent; }
.addr-input span { padding: 0 10px; color: var(--muted); white-space: nowrap; }
.search input { width: 220px; }
.note { margin-top: 12px; } .note input { max-width: 480px; }
.addr { word-break: break-all; font-family: ui-monospace, Consolas, monospace; }
table.list { width: 100%; border-collapse: collapse; }
table.list th { text-align: left; font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); padding: 6px 8px; border-bottom: 1px solid var(--line); }
table.list td { padding: 9px 8px; border-bottom: 1px solid var(--line); vertical-align: top; word-break: break-word; }
table.list .num { text-align: right; }
tr.unread td { background: var(--unread); font-weight: 600; }
tr.clickable { cursor: pointer; }
.tag { font-size: .7rem; padding: 1px 6px; border-radius: 10px; border: 1px solid var(--line); color: var(--muted); font-weight: 400; }
.badge { font-size: .72rem; padding: 1px 7px; border-radius: 10px; background: var(--primary); color: #fff; }
dl.meta { display: grid; grid-template-columns: max-content 1fr; gap: 4px 14px; margin: 0 0 12px; }
dl.meta dt { color: var(--muted); } dl.meta dd { margin: 0; word-break: break-word; }
.atts { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.att { border: 1px solid var(--line); border-radius: 7px; padding: 5px 10px; }
.actions form { display: inline; }
.tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }
iframe#htmlframe { width: 100%; border: 1px solid var(--line); border-radius: 8px; margin-top: 10px; background: #fff; }
pre.body { white-space: pre-wrap; word-break: break-word; margin: 0; font: 14px/1.5 ui-monospace, Consolas, monospace; }
@media (max-width: 720px) {
  .newaddr { grid-template-columns: 1fr; }
  .search input { width: 140px; }
  table.list thead { display: none; }
  table.list tr { display: block; border-bottom: 1px solid var(--line); padding: 6px 0; }
  table.list td { display: block; border: 0; padding: 2px 4px; text-align: left !important; }
}