/* ---------- Tokens ---------- */
:root {
  --bg: #fbf8f3;
  --surface: #ffffff;
  --surface-2: #f3eee6;
  --text: #22201c;
  --muted: #6b645a;
  --border: #e4ddd1;
  --accent: #c2410c;        /* tomato */
  --accent-soft: #fde8dc;
  --link: #b23a0a;

  --tag-language-bg: #e3edf9; --tag-language-fg: #1d4e89;
  --tag-domain-bg:   #e6f3e8; --tag-domain-fg:   #23633a;
  --tag-level-bg:    #f6ecd9; --tag-level-fg:    #7a4f0e;

  --code-bg: #1f1d1a;
  --code-fg: #ece6dc;
  --code-comment: #8f877a;
  --code-keyword: #f2a36b;
  --code-string: #a9d18e;
  --code-number: #e7c46a;
  --code-func: #8cc2f0;
  --code-punct: #bdb5a8;

  --radius: 10px;
  --wrap: 960px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #161412;
    --surface: #1f1c19;
    --surface-2: #29251f;
    --text: #ede8e0;
    --muted: #a59d90;
    --border: #3a342c;
    --accent: #fb8a4e;
    --accent-soft: #3b2418;
    --link: #fb9a66;
    --tag-language-bg: #1d2c40; --tag-language-fg: #9cc4f2;
    --tag-domain-bg:   #1d3324; --tag-domain-fg:   #9ad5ab;
    --tag-level-bg:    #3a2e19; --tag-level-fg:    #e6c48a;
    --code-bg: #0f0e0c;
  }
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 var(--font);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
main { flex: 1; width: 100%; padding-block: 2rem 4rem; }
a { color: var(--link); text-underline-offset: 2px; }
a:hover { color: var(--accent); }
h1, h2, h3 { line-height: 1.25; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); margin: 0 0 .5rem; }
h2 { font-size: 1.35rem; margin: 2.5rem 0 .75rem; }
h3 { font-size: 1.05rem; margin: 0 0 .35rem; }
img { max-width: 100%; height: auto; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: 16px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 8px; background: var(--surface); padding: .5rem 1rem; z-index: 10; }
.lede { color: var(--muted); font-size: 1.1rem; margin: 0 0 1rem; }
.fine { color: var(--muted); font-size: .85rem; }

/* ---------- Header / footer ---------- */
.site-header { border-bottom: 1px solid var(--border); background: var(--surface); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: .8rem; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: .55rem; font-weight: 700; color: var(--text); text-decoration: none; font-size: 1.05rem; }
.site-header nav { display: flex; gap: 1.25rem; }
.site-header nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.site-header nav a:hover, .site-header nav a[aria-current] { color: var(--text); }
.site-header nav a[aria-current] { box-shadow: inset 0 -2px 0 var(--accent); }

.site-footer { border-top: 1px solid var(--border); color: var(--muted); font-size: .9rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding-block: 1.5rem; }
.footer-inner p { margin: 0; }
.footer-inner nav { display: flex; gap: 1rem; }
.footer-inner a { color: var(--muted); }

/* ---------- Home ---------- */
.hero { padding-block: 2rem 1rem; max-width: 46rem; }
.hero h1 { font-size: clamp(2.1rem, 6vw, 3.2rem); }
.hero p { font-size: 1.15rem; color: var(--muted); }
.accent { color: var(--accent); }
.hero-actions { display: flex; gap: .75rem; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: .6rem 1.1rem; border-radius: 999px;
  background: var(--accent); color: #fff; text-decoration: none; font-weight: 600; font-size: 1rem;
}
.btn:hover { color: #fff; filter: brightness(1.08); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--text); background: var(--surface-2); }

.steps { list-style: none; padding: 0; margin: 1.5rem 0 0; display: grid; gap: .75rem; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); counter-reset: s; }
.steps li { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: .9rem 1rem; counter-increment: s; }
.steps li::before { content: counter(s); display: inline-grid; place-items: center; width: 1.6rem; height: 1.6rem; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: .85rem; margin-bottom: .4rem; }
.steps strong { display: block; }
.steps span { color: var(--muted); font-size: .92rem; }

/* ---------- Cards & chips ---------- */
.card-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.1rem 1.2rem; display: flex; flex-direction: column; gap: .4rem; }
.card h3 a { color: var(--text); text-decoration: none; }
.card h3 a:hover { color: var(--accent); }
.card p { margin: 0; color: var(--muted); font-size: .95rem; flex: 1; }

.chips { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .35rem; }
.chip { display: inline-block; padding: .1rem .55rem; border-radius: 999px; font-size: .78rem; font-weight: 600; text-decoration: none; }
.chip-language { background: var(--tag-language-bg); color: var(--tag-language-fg); }
.chip-domain   { background: var(--tag-domain-bg);   color: var(--tag-domain-fg); }
.chip-level    { background: var(--tag-level-bg);    color: var(--tag-level-fg); }
.chip:hover { filter: brightness(.95); color: inherit; }
.chips-lg .chip { font-size: .95rem; padding: .3rem .8rem; }
.count { opacity: .65; font-weight: 500; margin-left: .2rem; }
.tag-group h2 { margin-top: 2rem; }

/* ---------- Filters ---------- */
.filters { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.2rem; margin-bottom: 1.5rem; display: grid; gap: .8rem; }
.search input { width: 100%; padding: .6rem .8rem; border-radius: 8px; border: 1px solid var(--border); background: var(--bg); color: var(--text); font: inherit; }
.filters fieldset { border: 0; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; }
.filters legend { float: left; font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 600; width: 5.5rem; padding-top: .2rem; }
.toggle input { position: absolute; opacity: 0; }
.toggle span { display: inline-block; padding: .2rem .7rem; border: 1px solid var(--border); border-radius: 999px; font-size: .88rem; cursor: pointer; user-select: none; }
.toggle input:checked + span { background: var(--accent); border-color: var(--accent); color: #fff; }
.toggle input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.empty { color: var(--muted); }

/* ---------- Post ---------- */
.post { max-width: 46rem; }
.crumbs { font-size: .9rem; color: var(--muted); margin-bottom: 1rem; }
.post-meta { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; color: var(--muted); font-size: .9rem; }
.problem { background: var(--accent-soft); border-left: 4px solid var(--accent); border-radius: 0 var(--radius) var(--radius) 0; padding: .9rem 1.2rem; margin-top: 1.75rem; }
.problem h2 { margin: 0 0 .3rem; font-size: .85rem; text-transform: uppercase; letter-spacing: .08em; color: var(--accent); }
.problem p { margin: 0; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: .5rem 1.5rem; margin: 1.25rem 0 0; padding: 1rem 1.2rem; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.facts dt { font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 600; }
.facts dd { margin: 0; font-size: .95rem; overflow-wrap: anywhere; }

.prose > :first-child { margin-top: 0; }
.prose h2 { padding-top: .5rem; border-top: 1px solid var(--border); }
.prose li { margin-bottom: .3rem; }
.prose blockquote { margin: 1rem 0; padding: .6rem 1rem; border-left: 3px solid var(--border); color: var(--muted); }
.prose table { border-collapse: collapse; width: 100%; font-size: .95rem; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--border); padding: .4rem .6rem; text-align: left; }
.prose th { background: var(--surface-2); }
.narrow { max-width: 42rem; }

.gear, .related { margin-top: 2.5rem; }
.gear ul { padding-left: 1.2rem; }
.ad-slot { margin: 2rem 0; }

/* ---------- Code ---------- */
:not(pre) > code { font-family: var(--mono); font-size: .88em; background: var(--surface-2); padding: .1em .35em; border-radius: 5px; overflow-wrap: anywhere; }
.code-wrap { position: relative; margin: 1rem 0 1.25rem; }
pre[class*="language-"] {
  font-family: var(--mono); font-size: .86rem; line-height: 1.55;
  background: var(--code-bg); color: var(--code-fg);
  padding: 1rem 1.1rem; border-radius: var(--radius); overflow-x: auto; margin: 0;
  tab-size: 4;
}
pre[class*="language-"] code { font-family: inherit; }
.code-lang { position: absolute; top: .45rem; left: .9rem; font-size: .68rem; text-transform: uppercase; letter-spacing: .08em; color: var(--code-comment); font-family: var(--mono); pointer-events: none; }
.code-wrap pre { padding-top: 2rem; }
.copy-btn {
  position: absolute; top: .4rem; right: .4rem;
  font: 600 .75rem var(--font); padding: .3rem .6rem; border-radius: 6px; cursor: pointer;
  background: #ffffff1a; color: var(--code-fg); border: 1px solid #ffffff2a;
}
.copy-btn:hover { background: #ffffff2e; }

.token.comment, .token.prolog, .token.doctype, .token.cdata { color: var(--code-comment); font-style: italic; }
.token.keyword, .token.boolean, .token.important, .token.atrule { color: var(--code-keyword); }
.token.string, .token.char, .token.attr-value, .token.regex, .token.triple-quoted-string { color: var(--code-string); }
.token.number, .token.constant { color: var(--code-number); }
.token.function, .token.class-name, .token.builtin, .token.decorator { color: var(--code-func); }
.token.punctuation, .token.operator { color: var(--code-punct); }

@media (max-width: 560px) {
  body { font-size: 16px; }
  .filters legend { float: none; width: 100%; }
}