:root {
  --bg: #f6f7f9;
  --fg: #1c1e21;
  --mute: #6b7280;
  --card: #fff;
  --border: #e5e7eb;
  --accent: #0b76c1;
  --danger: #b91c1c;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115; --fg: #e5e7eb; --mute: #9aa3b2;
    --card: #171a21; --border: #262b35; --accent: #4aa3ff;
  }
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.55 -apple-system, "PingFang SC", "Microsoft YaHei", Segoe UI, sans-serif;
       background: var(--bg); color: var(--fg); }
.topbar { display: flex; align-items: center; justify-content: space-between;
          padding: 12px 20px; border-bottom: 1px solid var(--border); background: var(--card); }
.topbar .logo { font-weight: 700; color: var(--accent); text-decoration: none; font-size: 18px; }
.topbar nav { display: flex; gap: 16px; align-items: center; }
.topbar nav a { color: var(--fg); text-decoration: none; }
.topbar nav a:hover { color: var(--accent); }
.linkbtn { background: none; border: 0; color: var(--fg); cursor: pointer; padding: 0; }
form.inline { display: inline; }
.wrap { max-width: 880px; margin: 0 auto; padding: 24px 16px 80px; }

.stats { display: flex; gap: 16px; padding: 8px 0 16px; color: var(--mute); flex-wrap: wrap; }
.stats b { color: var(--fg); }

.submit-box { background: var(--card); border: 1px solid var(--border); padding: 12px;
              border-radius: 10px; margin-bottom: 16px; }
.submit-box form { display: flex; gap: 8px; }
.submit-box input { flex: 1; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px;
                    background: transparent; color: var(--fg); }
.submit-box button { padding: 8px 14px; background: var(--accent); color: white;
                     border: 0; border-radius: 6px; cursor: pointer; }
.notice { margin-top: 8px; color: var(--accent); }

.filters { margin-bottom: 20px; }
.filters form { display: flex; gap: 8px; margin-bottom: 8px; }
.filters input { flex: 1; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px;
                 background: var(--card); color: var(--fg); }
.filters button { padding: 8px 14px; border: 1px solid var(--border); background: var(--card);
                  color: var(--fg); border-radius: 6px; cursor: pointer; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { display: inline-block; padding: 4px 10px; border-radius: 999px; background: var(--card);
        color: var(--fg); text-decoration: none; border: 1px solid var(--border); font-size: 13px; }
.chip.active, .chip:hover { background: var(--accent); color: white; border-color: var(--accent); }
.chip .mute { opacity: 0.75; margin-left: 4px; }
.chip.small { font-size: 12px; padding: 2px 8px; }

.clusters { background: var(--card); border: 1px solid var(--border); padding: 12px 16px;
            border-radius: 10px; margin-bottom: 24px; }
.clusters h2 { margin: 0 0 8px 0; font-size: 16px; }
.clusters ul { list-style: none; padding: 0; margin: 0; }
.clusters li { padding: 8px 0; border-bottom: 1px solid var(--border); }
.clusters li:last-child { border-bottom: 0; }
.clusters .topic { margin: 4px 0 0 0; color: var(--mute); }
.clusters a { text-decoration: none; color: var(--fg); }
.clusters a:hover strong { color: var(--accent); }

.articles h2 { font-size: 16px; margin: 0 0 12px 0; }
.feed { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 12px 16px; }
.card.status-failed { border-left: 3px solid var(--danger); }
.card.status-pending, .card.status-fetching { border-left: 3px solid var(--mute); }
.card .row1 { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.card .title { color: var(--fg); text-decoration: none; font-weight: 600; font-size: 16px; }
.card .title:hover { color: var(--accent); }
.card .status { font-size: 12px; color: var(--mute); }
.card .row1-right { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.card.read { opacity: 0.55; }
.card.read .title { font-weight: 500; }
.read-btn { font-size: 12px; padding: 3px 10px; border: 1px solid var(--border);
            background: var(--card); color: var(--mute); border-radius: 999px;
            cursor: pointer; white-space: nowrap; }
.read-btn:hover { border-color: var(--accent); color: var(--accent); }
.read-btn.is-read { background: var(--accent); color: white; border-color: var(--accent); }
.read-btn.is-read:hover { opacity: 0.85; }
.card .meta { color: var(--mute); font-size: 13px; margin-top: 4px; }
.card .one-liner { margin: 6px 0 8px 0; color: var(--fg); }
.card .tags { display: flex; flex-wrap: wrap; gap: 4px; }
.empty { color: var(--mute); }
.mute { color: var(--mute); }

.article h1, .cluster h1 { margin-bottom: 4px; }
.article .meta, .cluster .mute { color: var(--mute); font-size: 13px; }
.article .meta a { color: var(--accent); margin-left: 8px; }
.summary-box { background: var(--card); border: 1px solid var(--border); border-radius: 10px;
               padding: 12px 16px; margin: 16px 0; }
.summary-box .one-liner { font-weight: 600; }
.summary-box ul { padding-left: 20px; }

.wx-body { background: var(--card); padding: 16px; border-radius: 10px; border: 1px solid var(--border); }
.wx-body img { max-width: 100%; height: auto; }
.wx-body p, .wx-body section { margin: 8px 0; }
.wx-body-text { white-space: pre-wrap; background: var(--card); padding: 16px; border-radius: 10px;
                border: 1px solid var(--border); font-family: inherit; }

.cluster .merged-body { background: var(--card); border: 1px solid var(--border); border-radius: 10px;
                        padding: 16px; margin: 16px 0; }
.cluster .merged-body h1 { font-size: 22px; margin: 4px 0 12px; }
.cluster .merged-body h2 { font-size: 17px; margin: 16px 0 6px; }
.cluster .merged-body ul { padding-left: 20px; }

/* Recycle bin */
.trash-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.trash-actions { display: flex; gap: 8px; margin-top: 8px; }
.trash-actions button { padding: 4px 10px; border-radius: 6px; border: 1px solid var(--border);
                        background: var(--card); color: var(--fg); cursor: pointer; font-size: 13px; }
.card.trashed { opacity: 0.85; border-left: 3px solid var(--mute); }
.card.trashed .title { color: var(--mute); }
button.danger, .linkbtn.danger { color: var(--danger); }
button.danger { border-color: var(--danger); }
button.danger:hover { background: var(--danger); color: white; }
.linkbtn.danger { background: none; border: 0; cursor: pointer; padding: 0; margin-left: 8px; font-size: 14px; }
.linkbtn.danger:hover { text-decoration: underline; }

/* Login */
.login-body { display: grid; place-items: center; height: 100vh; }
.loginbox { background: var(--card); border: 1px solid var(--border); padding: 24px;
            border-radius: 12px; width: 320px; text-align: center; }
.loginbox h1 { margin: 0 0 8px 0; color: var(--accent); }
.loginbox input { width: 100%; padding: 10px; margin: 8px 0; border-radius: 6px;
                  border: 1px solid var(--border); background: transparent; color: var(--fg); }
.loginbox button { width: 100%; padding: 10px; background: var(--accent); color: white;
                   border: 0; border-radius: 6px; cursor: pointer; }
.loginbox .err { color: var(--danger); margin: 8px 0; }