:root {
  --bg: #f4f6f9; --panel: #ffffff; --side: #0f1b2d; --side-fg: #c9d4e3; --side-dim: #7f8ea3;
  --side-active: #1f6feb; --fg: #1c2430; --muted: #5d6b7e; --line: #e2e6ec;
  --link: #0b4fc4; --news: #1f6feb; --forum: #d1530a; --thumb: #e7ebf1;
  --chip: #eef2f7; --chip-fg: #334155; --warn: #b42318; --kev: #b42318;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117; --panel: #161b22; --side: #090d13; --side-fg: #aab6c6;
    --fg: #e6edf3; --muted: #8b98a8; --line: #2a313c; --link: #6ea8ff;
    --news: #4c8dff; --forum: #f0883e; --thumb: #1f2630; --chip: #222a35; --chip-fg: #c4ceda;
    --warn: #ff7b72; --kev: #ff7b72;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; display: flex; min-height: 100vh; background: var(--bg); color: var(--fg);
  font: 15px/1.5 "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
}
a { color: var(--link); }

/* ----- left sidebar ----- */
.sidebar {
  width: 230px; flex: none; position: sticky; top: 0; height: 100vh; overflow-y: auto;
  background: var(--side); color: var(--side-fg); padding: 22px 14px;
  display: flex; flex-direction: column;
}
.brand { font-weight: 700; font-size: 13px; letter-spacing: .08em; text-transform: uppercase;
  color: #fff; margin: 0 10px 18px; }
.sidebar nav a { display: block; color: var(--side-fg); text-decoration: none;
  padding: 7px 10px; border-radius: 6px; font-variant-numeric: tabular-nums; }
.sidebar nav a:hover { background: rgba(255,255,255,.08); color: #fff; }
.sidebar nav a.active { background: var(--side-active); color: #fff; }
.sidebar nav a.home { font-weight: 600; font-size: 16px; }
.sidebar h2 { font-size: 11px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--side-dim); margin: 22px 10px 6px; font-weight: 600; }
.sidebar .none { padding: 4px 10px; font-size: 13px; color: var(--side-dim); }
.cve-trends { margin-top: auto; padding-top: 10px; border-top: 1px solid rgba(255,255,255,.08); }
.cve-trends ol { list-style: none; margin: 0; padding: 0; }
.cve-trends li { padding: 5px 10px; border-radius: 6px; }
.cve-trends li:hover { background: rgba(255,255,255,.06); }
.cve-trends a { color: #fff; text-decoration: none; font: 600 13.5px/1.3 Consolas, "Cascadia Mono", Menlo, monospace; }
.cve-trends a:hover { text-decoration: underline; }
.cve-trends .why { display: block; font-size: 11.5px; color: var(--side-dim); }
.cve-trends .kev { color: #ff8a80; font-weight: 600; }

/* ----- main area ----- */
main { flex: 1; min-width: 0; padding: 28px 28px 60px 36px; }
header h1 { margin: 0 0 4px; font-size: 28px; }
.sub { color: var(--muted); margin: 0 0 18px; font-size: 14px; }
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 24px; align-items: start; }

/* ----- news ----- */
.day h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted);
  margin: 10px 0 10px; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
.day + .day h2 { margin-top: 28px; }
.item { display: flex; background: var(--panel); border: 1px solid var(--line); border-radius: 8px;
  margin-bottom: 10px; overflow: hidden; }
.thumb { flex: 0 0 180px; position: relative; background: var(--thumb); }
.thumb > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb .ph { position: absolute; inset: 0; display: flex; flex-direction: column; gap: 6px;
  align-items: center; justify-content: center; padding: 8px; text-align: center;
  font-size: 12px; font-weight: 600; color: var(--muted); }
.thumb .ph img { width: 44px; height: 44px; object-fit: contain; border-radius: 8px;
  background: #fff; padding: 4px; }
.badge img { width: 14px; height: 14px; object-fit: contain; vertical-align: -2px; margin: 0 5px 0 -3px;
  background: #fff; border-radius: 3px; }
.body { flex: 1; min-width: 0; padding: 14px 16px; }
.item a.title { color: var(--link); font-weight: 600; font-size: 16px; text-decoration: none; }
.item a.title:hover { text-decoration: underline; }
.meta { font-size: 13px; color: var(--muted); margin: 4px 0 6px; }
.badge { display: inline-block; font-size: 12px; font-weight: 600; padding: 1px 8px;
  border-radius: 10px; margin-right: 6px; color: #fff; background: var(--news); }
.badge.forum { background: var(--forum); }
.summary { margin: 0; color: var(--fg); opacity: .88; font-size: 14px; }
.empty { color: var(--muted); padding: 30px 0; }
.site-footer { margin-top: 36px; padding-top: 14px; border-top: 1px solid var(--line);
  font-size: 12.5px; color: var(--muted); }
.site-footer p { margin: 4px 0; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-bottom: 6px; }
.site-footer nav a { color: var(--link); text-decoration: none; font-weight: 600; }
.site-footer nav a:hover { text-decoration: underline; }
.prose { max-width: 760px; font-size: 15px; }
.prose h2 { font-size: 18px; margin: 28px 0 8px; }
.prose p, .prose li { line-height: 1.6; }
.prose ul { padding-left: 22px; }
.prose li { margin: 4px 0; }
.prose .updated { color: var(--muted); font-size: 14px; }
.prose .contact { font-family: Consolas, "Cascadia Mono", Menlo, monospace; font-size: 14px;
  background: var(--chip); color: var(--chip-fg); padding: 1px 6px; border-radius: 4px;
  white-space: nowrap; }
.table-wrap { overflow-x: auto; }
.src-table { width: 100%; border-collapse: collapse; background: var(--panel);
  border: 1px solid var(--line); border-radius: 8px; font-size: 14px; }
.src-table th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .05em;
  color: var(--muted); padding: 9px 12px; border-bottom: 1px solid var(--line); }
.src-table td { padding: 8px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.src-table tr:last-child td { border-bottom: 0; }
.src-name { font-weight: 600; white-space: nowrap; }
.src-name img { width: 16px; height: 16px; object-fit: contain; vertical-align: -3px;
  margin-right: 8px; border-radius: 3px; background: #fff; }
.src-count { color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }

/* ----- tablets ----- */
.tablets { position: sticky; top: 16px; height: calc(100vh - 32px);
  display: flex; flex-direction: column; gap: 14px; }
.tablet { flex: 1 1 0; min-height: 0; display: flex; flex-direction: column;
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.tablet h3 { margin: 0; padding: 11px 14px; font-size: 14px; border-bottom: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.tablet h3 a { font-size: 12px; font-weight: 500; text-decoration: none; white-space: nowrap; }
.tablet ul { list-style: none; margin: 0; padding: 4px 0; overflow-y: auto; flex: 1; }
.tablet li { padding: 8px 14px; border-bottom: 1px solid var(--line); }
.tablet li:last-child { border-bottom: 0; }
.tablet li a { font-size: 13.5px; font-weight: 600; text-decoration: none; line-height: 1.35; }
.tablet li a:hover { text-decoration: underline; }
.tmeta { display: flex; flex-wrap: wrap; gap: 4px 6px; margin-top: 4px; font-size: 12px; color: var(--muted); }
.chip { background: var(--chip); color: var(--chip-fg); border-radius: 4px; padding: 0 6px;
  font: 600 11.5px/1.6 Consolas, "Cascadia Mono", Menlo, monospace; }
.chip.cvss-high { background: #b42318; color: #fff; }
.chip.cvss-med { background: #b54708; color: #fff; }
.tfoot { padding: 6px 14px; font-size: 11.5px; color: var(--muted); border-top: 1px solid var(--line); }
.tfoot.stale { color: var(--warn); }
.tablet .none { padding: 14px; font-size: 13px; color: var(--muted); }

/* ----- narrower screens ----- */
@media (max-width: 1250px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .tablets { order: -1; position: static; height: auto; display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .tablet { height: 300px; }
}
@media (max-width: 760px) {
  body { display: block; }
  .sidebar { position: static; width: auto; height: auto; padding: 14px 16px; }
  .sidebar nav { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
  .sidebar nav h2 { margin: 0 6px 0 10px; }
  .cve-trends { margin-top: 12px; }
  .cve-trends ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cve-trends li:nth-child(n+7) { display: none; }
  main { padding: 20px 16px 40px; }
  .tablets { grid-template-columns: minmax(0, 1fr); }
  .tablet { height: 250px; }
  .thumb { flex-basis: 96px; }
  .thumb .ph span { display: none; }
}