/* bshyuunn — dark, black & white, one blue accent, no rounded corners. */
@font-face {
  font-family: 'Newsreader';
  font-style: normal;
  font-weight: 400 700;
  font-display: optional;
  src: url('/assets/fonts/newsreader-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400 700;
  font-display: optional;
  src: url('/assets/fonts/jetbrains-mono-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --bg: #0E1013;
  --fg: #E7E9EC;
  --soft: #B9BEC6;
  --body: #C9CDD3;
  --muted: #8C939D;
  --faint: #5A616B;
  --line: #20242A;
  --code-bg: #15181D;
  --accent: #5B9BFF;
  --accent-55: rgba(91, 155, 255, 0.55);
  --accent-10: rgba(91, 155, 255, 0.10);
  --serif: 'Newsreader', 'IBM Plex Sans KR', Georgia, serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --hatch: repeating-linear-gradient(-45deg, var(--accent-55) 0 2px, transparent 2px 8px);
}

* { box-sizing: border-box; }
html { background: var(--bg); }

/* ── page transitions ──────────────────── */
@view-transition { navigation: auto; }
@media (prefers-reduced-motion: no-preference) {
  ::view-transition-old(root), ::view-transition-new(root) {
    animation-duration: 0.38s;
    animation-timing-function: ease;
  }
}
@media (prefers-reduced-motion: reduce) {
  ::view-transition-old(root), ::view-transition-new(root) { animation: none; }
}

/* ── entrance: content rises in on every page paint ──── */
@media (prefers-reduced-motion: no-preference) {
  @keyframes rise {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .stack > *, .cards > .card {
    animation: rise 0.5s cubic-bezier(.16,1,.3,1) both;
  }
  .stack > *:nth-child(1), .cards > .card:nth-child(1) { animation-delay: 0s; }
  .stack > *:nth-child(2), .cards > .card:nth-child(2) { animation-delay: .06s; }
  .stack > *:nth-child(3), .cards > .card:nth-child(3) { animation-delay: .12s; }
  .stack > *:nth-child(4), .cards > .card:nth-child(4) { animation-delay: .18s; }
  .stack > *:nth-child(5), .cards > .card:nth-child(5) { animation-delay: .24s; }
  .stack > *:nth-child(n+6), .cards > .card:nth-child(n+6) { animation-delay: .3s; }

  .hero .hatch, .page-head .hatch, .post-head .hatch {
    animation: hatch-draw 0.5s cubic-bezier(.16,1,.3,1) .1s both;
  }
  @keyframes hatch-draw {
    from { clip-path: inset(0 100% 0 0); }
    to { clip-path: inset(0 0 0 0); }
  }
}
body {
  margin: 0;
  zoom: 0.88;
  min-height: calc(100vh / 0.88);
  padding: 0 24px;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible, summary:focus-visible { outline: 2px solid currentColor; outline-offset: 2px; }
::selection { background: var(--accent-55); }
.muted { color: var(--muted); }
.accent { color: var(--accent); }

/* ── top bar ───────────────────────────── */
.top {
  max-width: 880px; margin: 0 auto;
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px 24px;
  padding: 18px 0 10px;
  font-family: var(--mono); font-size: 14px;
}
.brand { padding: 10px 0; letter-spacing: 0.06em; }
.top nav { display: flex; gap: 32px; font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; }
.top nav a { padding: 10px 0; color: var(--muted); }
.top nav a[aria-current="page"] { color: var(--fg); }
.crop { max-width: 976px; margin: 0 auto; display: flex; align-items: center; gap: 12px; }
.crop span { height: 1px; background: var(--line); flex: 1; }
.crop span:first-child, .crop span:last-child { flex: 0 0 28px; background: var(--muted); opacity: 0.5; }

/* ── page column ───────────────────────── */
.wrap { max-width: 760px; margin: 0 auto; }
.stack { display: flex; flex-direction: column; gap: 64px; padding: 80px 0 64px; }
.blog { gap: 56px; padding: 88px 0 72px; }
.post { gap: 40px; }
.hatch { height: 10px; background: var(--hatch); }
.foot { padding-top: 24px; border-top: 1px solid var(--line); font-family: var(--mono); font-size: 12px; color: var(--muted); }
.foot.split { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; }
.foot-links { display: flex; gap: 20px; }

/* ── about: hero ───────────────────────── */
.hero { display: flex; flex-direction: column; gap: 20px; }
.kicker { margin: 0; font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.name { display: flex; flex-direction: column; gap: 4px; }
.name h1 { margin: 0; font-size: 48px; font-weight: 500; letter-spacing: -0.015em; line-height: 1.1; }
.name p { margin: 0; }
.intro { margin: 0; color: var(--muted); }
.intro .hi { color: var(--fg); }
.links { margin-top: 14px; display: flex; flex-wrap: wrap; align-items: center; gap: 4px 24px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.links a { padding: 8px 0; }
.hero .hatch { margin-top: 20px; }

/* ── about: sections ───────────────────── */
section { display: flex; flex-direction: column; }
section h2 {
  margin: 0 0 14px; padding-bottom: 10px; border-bottom: 1px solid var(--line);
  display: flex; gap: 12px; align-items: baseline;
  font-size: 14px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
}
.sec { font-weight: 500; letter-spacing: 0; color: var(--accent); }
.total { margin-left: auto; font-family: var(--mono); font-size: 12px; font-weight: 400; letter-spacing: 0.04em; text-transform: none; color: var(--muted); }

.entry { display: flex; flex-direction: column; gap: 2px; padding: 8px 0 12px; }
.entry-top { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 0 24px; }
.entry-title { font-size: 18px; font-weight: 600; }
.date { font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; color: var(--muted); }
.entry .muted { color: var(--muted); }
.bullet { display: flex; gap: 10px; margin-top: 6px; color: var(--soft); }
.bullet > span:first-child { color: var(--faint); }

/* dotted link (ids, contest names) */
.dl { text-decoration: underline; text-decoration-style: dotted; text-decoration-color: #4A515B; text-underline-offset: 4px; }
.dl:hover { text-decoration-color: currentColor; }
.doc { display: inline-flex; color: var(--accent); }

/* disclosed bugs folds */
.fold { border-top: 1px solid var(--line); }
.fold summary {
  min-height: 44px; display: flex; align-items: center; gap: 12px; padding: 8px 0;
  cursor: pointer; list-style: none;
}
.fold summary::-webkit-details-marker { display: none; }
.chev { flex: 0 0 auto; color: var(--muted); transition: transform .15s ease; }
.fold[open] .chev { transform: rotate(90deg); }
.count { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.fold-body { display: flex; flex-direction: column; padding: 0 0 10px 26px; }
.bug { display: flex; flex-wrap: wrap; align-items: center; gap: 2px 16px; padding: 5px 0; font-size: 14px; }
.bug-id { flex: 0 0 152px; font-family: var(--mono); font-size: 12px; color: var(--muted); }
.bug-main { flex: 1 1 240px; min-width: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px; }
.redact { display: inline-flex; gap: 4px; align-items: center; }
.redact span { display: inline-block; height: 10px; background: rgba(231, 233, 236, 0.82); }
.bug .doc { width: 32px; height: 32px; margin: -6px 0; align-items: center; justify-content: center; }

/* contest / award rows */
.row { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 0 24px; padding: 6px 0; }
.row-main { flex: 1 1 360px; min-width: 0; display: flex; align-items: baseline; gap: 16px; }
.rank { flex: 0 0 52px; font-family: var(--mono); font-size: 13px; font-weight: 500; font-variant-numeric: tabular-nums; color: var(--muted); }
.rank.top10 { color: var(--fg); }
.rank.top3 { color: var(--accent); font-weight: 700; }
.rank.place { font-weight: 400; color: var(--fg); }
.rank.place.first { color: var(--accent); font-weight: 600; }
.rank.place.final { color: var(--muted); }
.row-side { display: flex; align-items: baseline; gap: 12px; font-family: var(--mono); font-size: 13px; font-variant-numeric: tabular-nums; }
.row-side.wide { gap: 20px; }
.row-side .icon { flex: 0 0 18px; display: inline-flex; justify-content: center; }
.row-side .doc svg { transform: translateY(2px); }
.sevs { display: flex; justify-content: flex-end; gap: 8px; min-width: 72px; }
.s-c, .s-h { color: var(--fg); }
.s-m { color: var(--soft); }
.s-l { color: var(--muted); }
.year { min-width: 36px; text-align: right; color: var(--muted); }
.more { display: flex; align-items: center; gap: 16px; padding: 8px 0; color: var(--muted); font-family: var(--mono); font-size: 13px; }
.more span:first-child { flex: 0 0 52px; letter-spacing: 0.2em; }

/* ── blog index ────────────────────────── */
.page-head { display: flex; flex-direction: column; gap: 14px; }
.page-head h1 { margin: 0; font-size: 54px; font-weight: 500; letter-spacing: -0.015em; line-height: 1.05; }
.page-head .hatch { margin-top: 18px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 48px 32px; }
.card { display: flex; flex-direction: column; gap: 12px; }
.card:hover { text-decoration: none; }
.card:hover .t { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; }
.cover { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; display: block; }
.cover.gen {
  filter: none; border: 1px solid var(--line); padding: 24px;
  display: flex; align-items: flex-end;
  background-color: #15181C;
  background-image: repeating-linear-gradient(-45deg, rgba(231, 233, 236, 0.035) 0 1px, transparent 1px 9px);
}
.cover.gen span { font-size: 26px; font-weight: 600; line-height: 1.15; letter-spacing: -0.01em; }
.card .meta { font-family: var(--mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.card .t { font-size: 21px; font-weight: 600; line-height: 1.35; }

/* ── post ──────────────────────────────── */
.post-head { display: flex; flex-direction: column; gap: 16px; }
.back { align-self: flex-start; padding: 4px 0; font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.post-head .meta { margin: 0; font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.post-head h1 { margin: 0; font-size: 42px; line-height: 1.18; font-weight: 500; letter-spacing: -0.015em; }
.post-head .hatch { margin-top: 8px; }
.post-cover { width: 100%; display: block; border: 1px solid var(--line); }

.prose { font-size: 18px; line-height: 1.75; color: var(--body); overflow-wrap: break-word; }
.prose > :first-child { margin-top: 0; }
.prose p, .prose ul, .prose ol, .prose blockquote, .prose table, .prose pre, .prose .highlighter-rouge { margin: 0 0 20px; }
.prose a { color: var(--fg); text-decoration: underline; text-decoration-color: var(--accent-55); text-underline-offset: 3px; }
.prose a:hover { text-decoration-color: var(--accent); }
.prose strong { color: var(--fg); }
.prose h2, .prose h3, .prose h4 { color: var(--fg); font-weight: 700; line-height: 1.35; }
.prose h2 { margin: 48px 0 20px; padding-bottom: 10px; border-bottom: 1px solid var(--line); font-size: 22px; }
.prose h2 .sec { margin-right: 10px; }
.prose h3 { margin: 32px 0 14px; font-size: 18px; }
.prose h3 .sec { margin-right: 8px; }
.prose h4 { margin: 24px 0 12px; font-size: 17px; }
.prose hr { border: 0; height: 1px; background: var(--line); margin: 36px 0; }
.prose ul, .prose ol { padding-left: 22px; }
.prose li + li { margin-top: 4px; }
.prose blockquote { margin-left: 0; padding: 2px 0 2px 18px; border-left: 2px solid var(--accent); color: var(--muted); }
.prose img { max-width: 100%; height: auto; display: block; margin: 8px auto; border: 1px solid var(--line); }
.prose table { width: 100%; border-collapse: collapse; font-size: 15px; display: block; overflow-x: auto; }
.prose th, .prose td { padding: 8px 12px; border: 1px solid var(--line); text-align: left; }
.prose th { color: var(--fg); background: var(--code-bg); }
.prose code { font-family: var(--mono); font-size: 0.8em; color: var(--fg); background: var(--code-bg); padding: 1px 6px; }
.prose pre {
  padding: 18px 20px; background: var(--code-bg); border: 1px solid var(--line);
  overflow-x: auto; font-family: var(--mono); font-size: 13px; line-height: 1.75; color: var(--fg);
}
.prose pre code { font-size: inherit; background: none; padding: 0; }
.prose .highlighter-rouge pre, .prose .highlight { margin: 0; }
.prose .highlighter-rouge .highlight { background: none; }

/* syntax: monochrome with a blue accent */
.highlight .c, .highlight .c1, .highlight .cm, .highlight .cs, .highlight .cp, .highlight .ch, .highlight .cpf { color: #6B727C; font-style: italic; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kt, .highlight .kc, .highlight .ow { color: var(--accent); }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sb, .highlight .sc, .highlight .sd, .highlight .se, .highlight .sh, .highlight .si, .highlight .sx, .highlight .sr, .highlight .ss { color: #A8C8FF; }
.highlight .m, .highlight .mi, .highlight .mf, .highlight .mh, .highlight .mo, .highlight .il, .highlight .mb { color: #D4D8DE; }
.highlight .nf, .highlight .fm, .highlight .nc, .highlight .nn { color: var(--fg); font-weight: 500; }
.highlight .o, .highlight .p { color: var(--soft); }
.highlight .nb, .highlight .bp, .highlight .na, .highlight .nt, .highlight .nv, .highlight .vi { color: #C9CDD3; }
.highlight .gd { color: #E58E8E; }
.highlight .gi { color: #8FD1A6; }
.highlight .err { color: inherit; background: none; }

.post-foot { display: flex; flex-direction: column; gap: 24px; }
.pn { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px 32px; }
.pn a { display: flex; flex-direction: column; gap: 2px; padding: 4px 0; font-family: var(--serif); font-size: 15px; color: var(--fg); max-width: 340px; }
.pn a.next { margin-left: auto; text-align: right; }
.pn .label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }

/* ── small screens ─────────────────────── */
@media (max-width: 640px) {
  body { zoom: 1; min-height: 100vh; padding: 0 16px; font-size: 16px; }
  .stack { gap: 48px; padding: 48px 0 48px; }
  .blog { padding: 56px 0 56px; }
  .name h1 { font-size: 38px; }
  .page-head h1 { font-size: 42px; }
  .post-head h1 { font-size: 30px; }
  .prose { font-size: 17px; }
  .bug-id { flex-basis: 100%; }
  .cards { grid-template-columns: 1fr; }
  .table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 -16px; padding: 0 16px 4px; }
  .table-scroll .row { flex-wrap: nowrap; min-width: 480px; }
}

.prose pre.highlight { background: var(--code-bg); }

/* ── post: table of contents rail ──────── */
html { scroll-behavior: smooth; }
.wrap.wide { max-width: none; }
.post-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 760px) minmax(0, 1fr); column-gap: 48px; }
.post-grid > .post { min-width: 0; }
.prose h2[id], .prose h3[id] { scroll-margin-top: 32px; }
.toc { align-self: start; position: sticky; top: 56px; max-width: 220px; padding-bottom: 48px; }
.toc-label { margin: 0 0 14px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.toc-list { display: flex; flex-direction: column; border-left: 1px solid var(--line); font-size: 14px; line-height: 1.45; }
.toc-list a { margin-left: -1px; padding: 5px 0 5px 16px; border-left: 1px solid transparent; color: var(--muted); }
.toc-list a.sub { padding-left: 30px; }
.toc-list a:hover { text-decoration: none; color: var(--fg); }
.toc-list a[aria-current="location"] { color: var(--fg); border-left-color: var(--accent); }
@media (max-width: 1240px) {
  .post-grid { display: block; max-width: 760px; margin: 0 auto; }
  .post-grid > div[aria-hidden], .toc { display: none; }
}