/* Shared stylesheet for /blog pages only. index.html keeps its own inline styles;
   tokens below are copied verbatim from it (source of truth for values:
   docs/marketing/brand-guidelines.md — both themes first-class). */
:root {
  --bg: #f7efe8;
  --surface: #fffbf7;
  --fg: #2b2333;
  --muted: #6d6178;
  --faint: #9a8fa4;
  --primary: #bc3d7b;
  --on-primary: #ffffff;
  --accent: #2e8f73;
  --accent-strong: #22684f;
  --danger: #c0433d;
  --border: #e8dcd2;
  --accent-soft: #dff0e9;
  --paper: #fffdf5;
  --paper-line: #efe4d4;
  --note-ink: #4a3f55;
  --wave: #dcadc6;
  --tag-bg: #ece4f4;
  --tag-fg: #5b4a75;
  --anki: #417fcb;
  --band: #f2e7db;
  --shadow-soft: 0 2px 12px rgba(66, 40, 74, 0.10);
  --shadow-card: 0 4px 18px rgba(66, 40, 74, 0.14);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17131f;
    --surface: #211b2d;
    --fg: #f1e9f0;
    --muted: #b3a7bd;
    --faint: #7d7189;
    --primary: #f07eb4;
    --on-primary: #2b1420;
    --accent: #5fd1ac;
    --accent-strong: #8fe0c4;
    --danger: #f08a84;
    --border: #342b42;
    --accent-soft: #1e3230;
    --paper: #29223a;
    --paper-line: #362d4a;
    --note-ink: #cfc3d6;
    --wave: #7a5570;
    --tag-bg: #322a45;
    --tag-fg: #beaed6;
    --anki: #82b7ec;
    --band: #1d1926;
    --shadow-soft: 0 2px 12px rgba(0, 0, 0, 0.35);
    --shadow-card: 0 4px 18px rgba(0, 0, 0, 0.45);
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: 'IBM Plex Sans KR', 'Apple SD Gothic Neo', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
p { margin: 0; }
h1, h2, h3 { font-family: 'Fredoka', sans-serif; font-weight: 500; line-height: 1.22; margin: 0; text-wrap: balance; }

.wrap { max-width: 680px; margin: 0 auto; padding: 0 22px 72px; }
section { margin-top: 56px; }
/* pixel sparkle divider, same language as index.html (base constellation only) */
section::before {
  content: '';
  display: block;
  width: 4px; height: 4px;
  margin: 0 auto 48px;
  background: var(--wave);
  --plus: 0 -4px var(--wave), 0 4px var(--wave), -4px 0 var(--wave), 4px 0 var(--wave);
  box-shadow: var(--plus), -24px -8px var(--wave), 20px 6px var(--wave);
}

.microlabel {
  font-family: 'Silkscreen', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* header */
.site-head { display: flex; align-items: center; justify-content: space-between; padding: 26px 0 0; }
.wordmark { display: inline-flex; align-items: center; gap: 9px; font-family: 'Fredoka', sans-serif; font-weight: 600; font-size: 1.3rem; color: var(--fg); }
.wordmark img { width: 57px; height: 38px; border-radius: 8px; }
a.wordmark { text-decoration: none; }

/* cta */
.cta { margin-top: 30px; display: flex; flex-direction: column; gap: 9px; align-items: flex-start; }
.cta.center { align-items: center; }
.cta-btn {
  display: inline-block; border: 0; cursor: pointer; text-decoration: none;
  font-family: inherit; font-weight: 500; font-size: 1.02rem;
  background: var(--primary); color: var(--on-primary);
  padding: 14px 34px; border-radius: 15px;
  box-shadow: 0 3px 14px rgba(188, 61, 123, 0.28);
  transition: transform 120ms ease;
}
.cta-btn:hover { transform: translateY(-1px); }
.cta-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.cta-btn-sm { padding: 8px 18px; border-radius: 11px; font-size: 0.88rem; box-shadow: 0 2px 8px rgba(188, 61, 123, 0.22); }
.cta-sub { font-size: 0.8rem; color: var(--muted); }

/* blog index */
.blog-head { display: flex; flex-direction: column; gap: 7px; }
.blog-head .microlabel { color: var(--primary); }
.blog-head h1 { font-size: 1.7rem; }
.blog-head p { color: var(--muted); font-size: 0.95rem; max-width: 54ch; }
.post-list { margin-top: 34px; display: flex; flex-direction: column; gap: 26px; }
.post-list article { display: flex; flex-direction: column; gap: 5px; }
/* the category filter sets [hidden]; the display rule above would otherwise override the UA display:none */
.post-list article[hidden] { display: none; }
.post-list h2 { font-size: 1.25rem; }
.post-list h2 a { color: var(--fg); text-decoration: none; }
.post-list h2 a:hover { color: var(--primary); }
.post-list h2 a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.post-meta { color: var(--faint); }
.post-list p { color: var(--muted); font-size: 0.92rem; max-width: 56ch; }

/* categories */
.cat-filter { margin-top: 24px; display: flex; gap: 8px; flex-wrap: wrap; }
.cat-chip {
  font-family: 'Silkscreen', monospace; font-size: 0.6rem; letter-spacing: 0.14em; text-transform: uppercase;
  background: none; border: 1px solid var(--border); color: var(--muted);
  padding: 6px 12px; border-radius: 999px; cursor: pointer;
}
.cat-chip:hover { color: var(--primary); border-color: var(--primary); }
.cat-chip.is-active { background: var(--tag-bg); color: var(--tag-fg); border-color: var(--tag-bg); }
.cat-chip:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.cat-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.cat-tag { font-size: 0.7rem; padding: 2px 9px; border-radius: 999px; background: var(--tag-bg); color: var(--tag-fg); }
.post-list .cat-tags { margin-top: 3px; }
article > .cat-tags { margin-top: 12px; }

/* post page */
.back-link { display: inline-block; margin-top: 34px; color: var(--muted); text-decoration: none; font-size: 0.85rem; }
.back-link:hover { color: var(--primary); }
article h1 { font-size: clamp(1.6rem, 5vw, 2.1rem); }
.byline { margin-top: 12px; color: var(--faint); }
.prose { margin-top: 26px; }
.prose p { margin: 0 0 1.1em; }
.prose h2 { font-size: 1.3rem; margin: 1.8em 0 0.5em; }
.prose a { color: var(--primary); }

/* footer */
.site-foot { margin-top: 104px; border-top: 1px solid var(--border); padding-top: 22px; font-size: 0.78rem; color: var(--muted); display: flex; flex-direction: column; gap: 10px; }
.site-foot a { color: var(--muted); }

@media (max-width: 620px) {
  section { margin-top: 40px; }
  section::before { margin-bottom: 32px; }
  .site-foot { margin-top: 72px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}