:root {
  --bg: #ffffff;
  --bg-soft: #f7f7f5;
  --fg: #242424;
  --fg-strong: #191919;
  --muted: #6b6b6b;
  --line: #ececec;
  --chip: #f2f2f2;
  --chip-on: #242424;
  --chip-on-fg: #ffffff;
  --accent: #1a8917;
  --accent-soft: #e8f3e8;
  --warn: #b25e00;
  --serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121212; --bg-soft: #1b1b1b; --fg: #dcdcdc; --fg-strong: #f2f2f2; --muted: #9a9a9a;
    --line: #2a2a2a; --chip: #232323; --chip-on: #f2f2f2; --chip-on-fg: #121212;
    --accent: #5fc35c; --accent-soft: #1d2b1d; --warn: #e3a35a; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #121212; --bg-soft: #1b1b1b; --fg: #dcdcdc; --fg-strong: #f2f2f2; --muted: #9a9a9a;
  --line: #2a2a2a; --chip: #232323; --chip-on: #f2f2f2; --chip-on-fg: #121212;
  --accent: #5fc35c; --accent-soft: #1d2b1d; --warn: #e3a35a; color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--fg); font: 16px/1.5 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }
svg { fill: currentColor; }

/* top bar */
.topbar { position: sticky; top: 0; z-index: 10; background: var(--bg); border-bottom: 1px solid var(--line); }
.topbar-inner { max-width: 1192px; margin: 0 auto; padding: 10px 24px; display: flex; align-items: center; gap: 20px; }
.logo { font: 700 26px/1 var(--serif); letter-spacing: -0.03em; color: var(--fg-strong); }
.search { display: flex; align-items: center; gap: 8px; background: var(--bg-soft); border-radius: 999px; padding: 8px 14px; flex: 0 1 300px; color: var(--muted); }
.search svg { width: 18px; height: 18px; flex: none; }
.search input { border: 0; outline: 0; background: transparent; color: var(--fg); font: 14px var(--sans); width: 100%; }
.mainnav { display: flex; gap: 18px; margin-left: auto; font-size: 14px; color: var(--muted); }
.mainnav a:hover, .mainnav a.on { color: var(--fg-strong); }
.mainnav a.on { box-shadow: inset 0 -2px 0 var(--fg-strong); padding-bottom: 4px; }
.icon-btn { width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; color: var(--muted); }
.icon-btn:hover { background: var(--bg-soft); color: var(--fg-strong); }
.icon-btn svg { width: 20px; height: 20px; }

/* layout */
.layout { max-width: 1192px; margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 64px; }
main { min-width: 0; padding: 28px 0 64px; max-width: 728px; }
aside { border-left: 1px solid var(--line); padding: 28px 0 64px 32px; min-width: 0; }
@media (max-width: 960px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 0; }
  aside { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; }
  main { max-width: none; }
}
@media (max-width: 720px) {
  .topbar-inner { flex-wrap: wrap; padding: 10px 16px; gap: 10px 14px; }
  .search { order: 3; flex: 1 1 100%; }
  .mainnav { order: 4; flex: 1 1 100%; margin-left: 0; overflow-x: auto; gap: 16px; scrollbar-width: none; }
  .mainnav a { white-space: nowrap; }
  #theme { margin-left: auto; }
  .layout { padding: 0 16px; }
}

/* section header + chips */
.page-title { font: 700 32px/1.15 var(--serif); letter-spacing: -0.02em; color: var(--fg-strong); margin: 0 0 6px; }
.page-sub { color: var(--muted); margin: 0 0 22px; font-size: 15px; }
.chips { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 6px; margin-bottom: 8px; scrollbar-width: thin; }
.chip { flex: none; font-size: 14px; padding: 6px 14px; border-radius: 999px; background: var(--chip); color: var(--fg); white-space: nowrap; }
.chip:hover { filter: brightness(0.96); }
.chip.on { background: var(--chip-on); color: var(--chip-on-fg); }
.chip .n { opacity: .6; margin-left: 4px; font-size: 12px; }
.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 18px; font-size: 14px; color: var(--muted); border-bottom: 1px solid var(--line); padding: 8px 0 12px; margin-bottom: 4px; }
.seg { display: flex; gap: 14px; }
.seg button { color: var(--muted); padding: 2px 0; }
.seg button.on { color: var(--fg-strong); box-shadow: inset 0 -1px 0 var(--fg-strong); }
.toggle { display: inline-flex; align-items: center; gap: 6px; margin-left: auto; cursor: pointer; }
.toggle input { accent-color: var(--accent); }

/* story card */
.story { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px 28px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.story.read .story-title, .story.read .story-sum { opacity: .55; }
.byline { grid-column: 1 / -1; display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--fg); min-width: 0; }
.byline .who { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.byline .muted { color: var(--muted); }
.av { width: 22px; height: 22px; border-radius: 50%; flex: none; display: grid; place-items: center; font: 700 11px var(--sans); color: #fff; }
.story-title { display: block; font: 700 21px/1.3 var(--sans); letter-spacing: -0.01em; color: var(--fg-strong); margin: 0 0 6px; }
.story-title:hover { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.story-sum { font: 16px/1.5 var(--serif); color: var(--muted); margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.thumb { width: 160px; height: 107px; object-fit: cover; border-radius: 4px; background: var(--bg-soft); grid-row: 2 / span 2; grid-column: 2; }
.meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; font-size: 13px; color: var(--muted); margin-top: 10px; }
.pill { background: var(--chip); color: var(--fg); padding: 2px 10px; border-radius: 999px; font-size: 12.5px; }
.pill:hover { filter: brightness(0.95); }
.new { color: var(--accent); font-weight: 600; }
.meta .act { margin-left: auto; display: flex; gap: 4px; }
.meta .icon-btn { width: 30px; height: 30px; }
.meta .icon-btn svg { width: 18px; height: 18px; }
.icon-btn.on { color: var(--fg-strong); }
@media (max-width: 560px) {
  .thumb { width: 84px; height: 56px; grid-row: 2; }
  .story-title { font-size: 17px; }
  .story-sum { -webkit-line-clamp: 3; font-size: 15px; }
}

/* repo + release cards */
.repo { padding: 20px 0; border-bottom: 1px solid var(--line); }
.repo-name { font: 600 18px/1.3 var(--sans); color: var(--fg-strong); word-break: break-word; }
.repo-name .owner { font-weight: 400; color: var(--muted); }
.repo-name:hover { text-decoration: underline; }
.repo-desc { font: 15.5px/1.5 var(--serif); color: var(--fg); margin: 6px 0 10px; }
.stat { display: inline-flex; align-items: center; gap: 4px; }
.stat svg { width: 14px; height: 14px; }
.lang-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.up { color: var(--accent); font-weight: 600; }
.tag-pre { color: var(--warn); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
.subhead { font: 700 20px/1.2 var(--sans); color: var(--fg-strong); margin: 34px 0 2px; }
.subhead + p { color: var(--muted); margin: 0 0 6px; font-size: 14px; }
.notes { font-size: 14px; color: var(--muted); margin: 6px 0 0; }

/* sidebar */
.side-block { margin-bottom: 36px; }
.side-title { font: 600 16px var(--sans); color: var(--fg-strong); margin: 0 0 14px; }
.streak { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.streak div { background: var(--bg-soft); border-radius: 8px; padding: 10px 12px; }
.streak b { display: block; font: 700 22px/1.1 var(--sans); color: var(--fg-strong); font-variant-numeric: tabular-nums; }
.streak span { font-size: 12px; color: var(--muted); }
.pick { display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.pick:last-child { border-bottom: 0; }
.pick input { margin-top: 3px; accent-color: var(--accent); width: 16px; height: 16px; }
.pick .ptopic { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.pick a { display: block; font: 600 14.5px/1.35 var(--sans); color: var(--fg-strong); }
.pick a:hover { text-decoration: underline; }
.pick.done a { text-decoration: line-through; color: var(--muted); }
.mini { padding: 9px 0; font-size: 14px; }
.mini a { font-weight: 600; color: var(--fg-strong); word-break: break-word; }
.mini a:hover { text-decoration: underline; }
.mini div { color: var(--muted); font-size: 12.5px; }
.side-link { font-size: 14px; color: var(--accent); }
.progress { height: 4px; background: var(--line); border-radius: 2px; overflow: hidden; margin: -6px 0 10px; }
.progress i { display: block; height: 100%; background: var(--accent); }

/* archive */
.days { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.day { border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; }
.day:hover { border-color: var(--muted); }
.day b { display: block; color: var(--fg-strong); }
.day span { font-size: 13px; color: var(--muted); }

.empty { color: var(--muted); padding: 40px 0; text-align: center; }
.more { display: block; margin: 24px auto 0; padding: 8px 20px; border: 1px solid var(--line); border-radius: 999px; font-size: 14px; }
.more:hover { border-color: var(--muted); }
.foot { max-width: 1192px; margin: 0 auto; padding: 24px; border-top: 1px solid var(--line); font-size: 13px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 6px 24px; justify-content: space-between; }
@media (max-width: 720px) { .foot { padding: 20px 16px; } }