:root {
  --bg: #f4f5f7; --panel: #ffffff; --side: #fbfbfc; --text: #1b1f24; --muted: #6b7380; --line: #e3e6ea;
  --accent: #1f4e9c; --accent-soft: #e8eefa; --danger: #c0392b; --ok: #2e7d32; --warn: #b26a00;
  --read: #9aa1ab;
  --serif: "Merriweather", "PT Serif", Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #15181c; --panel: #1d2126; --side: #191c20; --text: #e4e7eb; --muted: #9aa3ae; --line: #2c3238;
    --accent: #7ea7ec; --accent-soft: #24324a; --read: #6c737c; }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 var(--sans); }
[hidden] { display: none !important; }
a { color: var(--accent); }
button { font: inherit; color: inherit; }

.btn { border: 1px solid var(--line); background: var(--panel); border-radius: 8px; padding: 6px 12px; cursor: pointer; }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn.danger { color: var(--danger); }
.btn:disabled { opacity: .5; cursor: default; }
.icon-btn { border: 0; background: none; cursor: pointer; font-size: 18px; padding: 4px 8px; border-radius: 6px; color: var(--muted); }
.icon-btn:hover { background: var(--accent-soft); color: var(--accent); }
input, select, textarea { font: inherit; color: var(--text); background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; }
input:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }

/* login */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-box { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 28px; width: min(340px, 100%); display: grid; gap: 12px; }
.login-box h1 { margin: 0 0 4px; color: var(--accent); }
.error { color: var(--danger); min-height: 1em; margin: 0; }

/* layout */
.app { display: grid; grid-template-columns: 280px 1fr; min-height: 100vh; }
.sidebar { background: var(--side); border-right: 1px solid var(--line); display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; overflow: hidden; }
.side-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 14px 8px; }
.logo { font-weight: 700; color: var(--accent); font-size: 18px; }
#nav { overflow-y: auto; flex: 1; padding: 0 8px 8px; }
.nav-group { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); padding: 14px 8px 4px; }
.nav-item { display: flex; align-items: center; gap: 8px; padding: 6px 8px; border-radius: 8px; color: var(--text); text-decoration: none; cursor: pointer; width: 100%; text-align: left; border: 0; background: none; }
.nav-item:hover { background: var(--accent-soft); }
.nav-item.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.nav-item .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-item .count { font-size: 12px; color: var(--muted); }
.nav-item.dim .name { color: var(--muted); }
.nav-item .err { color: var(--danger); font-size: 12px; }
.side-foot { border-top: 1px solid var(--line); padding: 8px; }

.main { min-width: 0; }
.backdrop { display: none; }
.topbar { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; gap: 10px; padding: 10px 20px; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(6px); border-bottom: 1px solid var(--line); }
.topbar h2 { margin: 0; font-size: 18px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.spacer { flex: 1; }
.topbar .btn { white-space: nowrap; }
.menu-btn { display: none; }
.view { max-width: 820px; margin: 0 auto; padding: 16px 20px 90vh; }

/* entries */
.entry { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px 22px; margin-bottom: 14px; }
.entry.read { opacity: .62; }
.entry.current { border-color: var(--accent); }
.entry-meta { display: flex; flex-wrap: wrap; gap: 4px 10px; font-size: 13px; color: var(--muted); align-items: center; }
.entry-meta .feed { color: var(--accent); font-weight: 600; text-decoration: none; }
.entry h3 { margin: 8px 0 0; font-size: 21px; line-height: 1.3; }
.entry h3 a { color: inherit; text-decoration: none; }
.entry h3 a:hover { color: var(--accent); }
.entry-body { font-family: var(--serif); font-size: 16.5px; line-height: 1.7; margin-top: 12px; overflow-wrap: anywhere; }
.entry-body img, .entry-body video, .entry-body iframe { max-width: 100%; height: auto; border-radius: 6px; }
.entry-body pre { overflow-x: auto; background: var(--bg); padding: 10px; border-radius: 6px; }
.entry-body blockquote { margin: 8px 0; padding-left: 14px; border-left: 3px solid var(--line); color: var(--muted); }
.entry-body p { margin: 0 0 .8em; }
.entry-actions { display: flex; gap: 4px; margin-top: 10px; border-top: 1px solid var(--line); padding-top: 8px; }
.entry-actions .icon-btn.on { color: var(--accent); }
.entry-actions .icon-btn { font-size: 14px; }
.end { text-align: center; color: var(--muted); padding: 40px 0; }
.sentinel { height: 1px; }

/* digest */
.dg-head { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between; }
.hl { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.hl li { padding: 10px 12px; border-left: 3px solid var(--accent); background: var(--accent-soft); border-radius: 6px; font-family: var(--serif); font-size: 16px; line-height: 1.55; }
.topic { border-top: 1px solid var(--line); padding: 14px 0 6px; }
.topic:first-of-type { border-top: 0; padding-top: 0; }
.topic h4 { margin: 0 0 4px; font-size: 17px; display: flex; gap: 8px; align-items: baseline; }
.topic p { margin: 4px 0; font-family: var(--serif); line-height: 1.6; }
.imp { font-size: 11px; letter-spacing: 1px; color: var(--accent); white-space: nowrap; }
.imp .off { color: var(--line); }
.refs { display: flex; flex-wrap: wrap; gap: 4px 6px; margin-top: 6px; font-family: var(--sans); }
.ref { font-size: 12px; color: var(--muted); text-decoration: none; border: 1px solid var(--line); border-radius: 999px; padding: 1px 8px; background: var(--panel); }
.ref:hover { color: var(--accent); border-color: var(--accent); }
details.posts summary { cursor: pointer; font-size: 13px; color: var(--muted); margin-top: 4px; }
details.posts ul { padding-left: 18px; font-size: 14px; margin: 6px 0; }
details.posts li { margin-bottom: 6px; }
.dg-row { border-top: 1px solid var(--line); padding: 8px 0; }
.spin { display: inline-block; animation: spin 1.2s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* manage */
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; margin-bottom: 16px; }
.card h3 { margin: 0 0 12px; font-size: 17px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.row input[type=url], .row input.grow { flex: 1; min-width: 200px; }
.cand { border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; margin-top: 12px; }
.cand .samples { font-size: 13px; color: var(--muted); margin: 8px 0; padding-left: 18px; }
.cand .samples li { margin-bottom: 4px; }
.opts { display: grid; gap: 8px; margin-top: 10px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { display: inline-flex; gap: 6px; align-items: center; border: 1px solid var(--line); border-radius: 999px; padding: 3px 10px; font-size: 13px; cursor: pointer; }
.chip input { margin: 0; }
table.subs { width: 100%; border-collapse: collapse; font-size: 14px; }
table.subs td { padding: 8px 6px; border-top: 1px solid var(--line); vertical-align: top; }
table.subs .url { color: var(--muted); font-size: 12px; word-break: break-all; }
.status-ok { color: var(--ok); } .status-error { color: var(--danger); } .status-paused { color: var(--warn); }
.muted { color: var(--muted); }
.small { font-size: 13px; }

.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 10px; z-index: 50; max-width: 90vw; }

@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: fixed; z-index: 20; left: 0; top: 0; width: 290px; transform: translateX(-100%); transition: transform .2s; }
  .app.menu-open .sidebar { transform: none; }
  .app.menu-open .backdrop { display: block; position: fixed; inset: 0; background: #0006; z-index: 15; }
  .menu-btn { display: inline-block; }
  .topbar { padding: 8px 12px; }
  .view { padding: 12px 10px 90vh; }
  .entry { padding: 14px 14px; border-radius: 10px; }
  .entry h3 { font-size: 19px; }
}