:root {
  color-scheme: dark;
  --page: #111111;
  --panel: #191919;
  --hover: #292929;
  --line: #303030;
  --text: #f2f2f2;
  --muted: #9b9b9b;
  --faint: #676767;
  --accent: #62d494;
  --read: #737373;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { background: var(--page); }
body { margin: 0; min-width: 320px; background: var(--page); color: var(--text); font: 15px/1.4 var(--sans); }
a { color: inherit; text-decoration: none; }

.sidebar {
  position: fixed; inset: 0 auto 0 0; z-index: 2; overflow-y: auto;
  width: 276px; padding: 18px 12px 24px; border-right: 1px solid var(--line); background: var(--panel);
}
.brand { display: flex; gap: 10px; align-items: center; padding: 6px 10px 20px; font-size: 16px; font-weight: 700; }
.brand-mark { color: var(--accent); font-size: 22px; line-height: 1; }
.sidebar-note, .sidebar-footer { margin: 0 10px 18px; color: var(--faint); font-size: 12px; }
.sidebar-footer { margin-top: 30px; line-height: 1.5; }
.category-group { margin: 0 0 18px; }
.category-button {
  display: flex; width: 100%; justify-content: space-between; align-items: center; border: 0; border-radius: 6px;
  padding: 8px 10px; background: transparent; color: var(--text); font: 600 14px var(--sans); text-align: left; cursor: pointer;
}
.category-button:hover, .category-button.is-active { background: var(--hover); }
.category-button::before { content: "⌄"; width: 17px; color: var(--muted); font-weight: 400; }
.category-button span:first-child { margin-right: auto; }
.category-count { color: var(--faint); font-weight: 400; font-size: 12px; }
.category-group ul { margin: 5px 0 0 27px; padding: 0; list-style: none; }
.category-group li { overflow: hidden; padding: 2px 0; white-space: nowrap; text-overflow: ellipsis; }
.source-button { display: flex; width: 100%; align-items: center; justify-content: space-between; gap: 8px; overflow: hidden; border: 0; border-radius: 4px; padding: 4px 7px; background: transparent; color: #cbcbcb; font: 13px var(--sans); text-align: left; cursor: pointer; }
.source-button > span:first-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.source-count { flex: 0 0 auto; color: var(--faint); font-size: 11px; font-variant-numeric: tabular-nums; }
.source-button:hover, .source-button.is-active { background: var(--hover); color: var(--text); }

main { width: min(900px, calc(100% - 276px)); margin-left: max(276px, calc((100% - 1100px) / 2)); padding: 45px 44px 80px; }
.feed-header { display: flex; justify-content: space-between; align-items: end; gap: 18px; padding: 0 0 25px; border-bottom: 1px solid var(--line); }
.eyebrow { margin: 0 0 5px; color: var(--accent); text-transform: uppercase; letter-spacing: .15em; font-size: 10px; font-weight: 700; }
h1 { margin: 0; font-size: 28px; line-height: 1.1; letter-spacing: -.035em; }
.feed-header > p { margin: 0; color: var(--muted); font-size: 13px; }
.feed-list { max-width: 760px; }
.feed-card { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 18px; padding: 23px 0; border-bottom: 1px solid var(--line); transition: opacity .18s ease; }
.feed-card.is-read { opacity: .46; }
.feed-card.is-read h2, .feed-card.is-read .meta { color: var(--read); }
.card-media { display: block; height: 124px; overflow: hidden; border-radius: 5px; background: #242424; }
.card-media img { display: block; width: 100%; height: 100%; object-fit: cover; }
.ph { display: grid; height: 100%; place-items: center; color: var(--faint); font-size: 30px; }
.card-body { min-width: 0; padding: 1px 0; }
.meta { margin: 0 0 6px; color: var(--muted); font-size: 12px; }
.meta span { padding: 0 3px; color: var(--faint); }
.attention { margin-left: 7px; color: var(--accent); }
h2 { margin: 0; font-size: 18px; line-height: 1.2; letter-spacing: -.018em; }
h2 a:hover { color: var(--accent); }
.summary { margin: 7px 0 0; color: var(--muted); font-size: 13px; line-height: 1.35; }
.siblings { display: inline-block; margin: 9px 0 0; color: var(--accent); font-size: 12px; }
.empty { padding: 50px 0; color: var(--muted); }
main > footer, .failed { display: block; margin: 35px 0 0; color: var(--faint); font-size: 12px; }

@media (max-width: 760px) {
  .sidebar { position: static; width: auto; padding: 14px 12px; border-right: 0; border-bottom: 1px solid var(--line); }
  .brand { padding-bottom: 10px; }
  .sidebar-note, .sidebar-footer, .category-group ul { display: none; }
  nav { display: flex; gap: 4px; overflow-x: auto; }
  .category-group { margin: 0; flex: 1 0 auto; }
  .category-button::before { display: none; }
  .category-button span:first-child { margin-right: 15px; }
  main { width: auto; margin: 0; padding: 28px 18px 55px; }
  .feed-card { grid-template-columns: 112px minmax(0, 1fr); gap: 13px; padding: 17px 0; }
  .card-media { height: 80px; }
  h2 { font-size: 15px; }
  .summary { display: none; }
}