:root {
  --bg: #f4f6f7; --card: #ffffff; --text: #18212b; --muted: #66727f; --line: #e2e7ea;
  --accent: #0f6e6e; --accent-ink: #ffffff; --urgent: #c62828; --warn: #b26a00; --ok: #2e7d32;
  --chip: #eef3f3;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1418; --card: #182027; --text: #e7ecef; --muted: #93a1ad; --line: #26313a;
    --accent: #3fb3b0; --accent-ink: #062222; --chip: #20302f; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
.hidden { display: none !important; }
.muted { color: var(--muted); } .small { font-size: 13px; }
.center { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.center-text { text-align: center; padding: 32px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.login { width: min(360px, 100%); display: grid; gap: 12px; }
.login h1 { margin: 0; }
label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
input, select { font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--text); }
.btn { font: inherit; border: 1px solid var(--line); background: var(--card); color: var(--text);
  padding: 8px 14px; border-radius: 8px; cursor: pointer; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.btn.ok { background: var(--ok); color: #fff; border-color: var(--ok); }
.btn.ghost { background: transparent; }
.btn.small { padding: 6px 10px; font-size: 13px; }
.error { color: var(--urgent); min-height: 1em; margin: 0; }
.topbar { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 10px 16px; background: var(--card); border-bottom: 1px solid var(--line); }
.spacer { flex: 1; }
.banner { margin: 12px 16px 0; padding: 10px 12px; border-radius: 8px; background: #fff4e5; color: #6b4300; }
@media (prefers-color-scheme: dark) { .banner { background: #3a2a0c; color: #ffd9a0; } }
#inbox-view, #detail-view, #admin-view { max-width: 860px; margin: 0 auto; padding: 12px 16px 40px; }
.tabs { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 8px; align-items: center; }
.tabs button:not(.btn) { font: inherit; font-size: 14px; border: 1px solid var(--line); background: var(--card);
  color: var(--text); padding: 6px 12px; border-radius: 999px; white-space: nowrap; cursor: pointer; }
.tabs button.active { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.tabs b:empty { display: none; } .tabs b { margin-left: 4px; }
.list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.item { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--line);
  border-radius: 10px; padding: 12px; cursor: pointer; }
.item.p3 { border-left-color: var(--urgent); } .item.p2 { border-left-color: var(--warn); }
.item .top { display: flex; gap: 8px; align-items: baseline; }
.item .from { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.item .time { margin-left: auto; color: var(--muted); font-size: 12px; white-space: nowrap; }
.item .subj { margin: 2px 0; }
.item .snip { color: var(--muted); font-size: 13px; overflow: hidden; display: -webkit-box;
  -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.chip { display: inline-block; font-size: 12px; padding: 1px 8px; border-radius: 999px; background: var(--chip); }
.chip.urgent { background: var(--urgent); color: #fff; }
.meta { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; align-items: center; font-size: 12px; }
.detail-body { white-space: pre-wrap; word-break: break-word; margin-top: 12px; padding-top: 12px;
  border-top: 1px solid var(--line); }
.actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; } .row input { flex: 1 1 160px; }
.table { width: 100%; border-collapse: collapse; margin-top: 12px; font-size: 14px; }
.table td, .table th { padding: 8px 6px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.table tr.off { opacity: .5; }
.note { background: var(--chip); padding: 10px 12px; border-radius: 8px; }
@media (max-width: 560px) { .table .hide-sm { display: none; } }
.files { margin: 10px 0; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.files .file { text-decoration: none; max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.files.danger { color: #b42318; font-weight: 600; }
.viewer { position: fixed; inset: 0; z-index: 50; background: rgba(0,0,0,.92); display: flex; flex-direction: column; }
.viewer-bar { display: flex; gap: 8px; padding: 10px 12px; justify-content: space-between; }
.viewer img { flex: 1; min-height: 0; width: 100%; object-fit: contain; touch-action: pinch-zoom; }