/* 개발 로그. 셸(상단 바 · 좌측 글 색인 · 우측 「이 페이지 안에서」)은
   보고서 사이트(ats.minahdev.cloud)와 같은 것을 쓰고, 그 안의 목록·글 스타일만 다르다.
   흐린 회색(#9ca3af)은 대비가 모자라 쓰지 않는다. */

:root {
  --ink: #111827;
  --body: #1f2937;
  --sub: #374151;
  --cap: #4b5563;       /* 흰 배경 7.0:1 */
  --line: #e5e7eb;
  --hair: #eef0f2;
  --wash: #f9fafb;
  --side: #f7f8fa;
  --accent: #1d4ed8;    /* 흰 배경 6.3:1 */
  --deep: #1e3a8a;
  --here-bg: #eaefff;
  --chip: #d8e1ff;
  --tagbg: #eef2ff;
  --side-w: 288px;
  --onpage-w: 232px;
  --top-h: 56px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 76px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: "IBM Plex Sans KR", "Noto Sans KR", system-ui, sans-serif;
  background: #fff;
  color: var(--body);
  line-height: 1.75;
  word-break: keep-all;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }
a:hover { color: var(--deep); }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: #fff; color: var(--ink);
  padding: 10px 14px; border: 1px solid var(--accent);
  border-radius: 0 0 6px 0; z-index: 100;
}
.skip:focus { left: 0; }

:where(a, button, input):focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ── 상단 바 ─────────────────────────────── */

.top {
  position: sticky; top: 0; z-index: 30;
  height: var(--top-h);
  display: flex; align-items: center; gap: 20px;
  padding: 0 20px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.top__brand { display: flex; align-items: center; gap: 9px; text-decoration: none; color: var(--accent); flex: 0 0 auto; }
.top__name { font-size: 15px; font-weight: 700; color: var(--ink); letter-spacing: -0.01em; }
.top__rule { width: 1px; height: 14px; background: var(--line); }
.top__kind { font-size: 13px; color: var(--cap); }

.top__drawer {
  display: none; align-items: center; justify-content: center;
  width: 34px; height: 34px;
  border: 1px solid #d5d9df; border-radius: 5px;
  background: #fff; color: var(--sub); cursor: pointer;
}

.top__search { flex: 1; min-width: 0; display: flex; align-items: center; justify-content: center; gap: 10px; }
.top__search label { font-size: 12.5px; font-weight: 500; color: var(--sub); }
.top__search .field {
  display: flex; align-items: center; gap: 8px;
  width: min(372px, 100%); height: 33px;
  border: 1px solid #d5d9df; border-radius: 5px;
  padding: 0 7px 0 10px; color: var(--cap);
}
.top__search .field:focus-within { border-color: var(--accent); }
.top__search input {
  flex: 1; min-width: 0; border: 0; outline: 0; background: transparent;
  font: 400 12.5px/1 "IBM Plex Sans KR", sans-serif; color: var(--ink);
}
.kbd {
  flex: 0 0 auto;
  font: 500 10.5px/1 "IBM Plex Mono", monospace;
  color: var(--cap); background: #f3f4f6;
  border: 1px solid var(--line); border-radius: 3px; padding: 3px 5px;
}

.top__meta { display: flex; align-items: center; gap: 14px; flex: 0 0 auto; }
.top__rev { font: 400 11.5px/1 "IBM Plex Mono", monospace; color: var(--cap); }
.top__meta a { font-size: 12px; font-weight: 500; text-decoration: none; }
.top__meta a:hover { text-decoration: underline; }

/* ── 셸 ─────────────────────────────────── */

.shell { display: flex; align-items: flex-start; }

/* ── 좌측 글 색인 ─────────────────────────── */

.side {
  flex: 0 0 var(--side-w); width: var(--side-w);
  position: sticky; top: var(--top-h);
  height: calc(100vh - var(--top-h));
  overflow-y: auto; overscroll-behavior: contain;
  background: var(--side);
  border-right: 1px solid var(--line);
  padding: 16px 0 24px;
}

.side__head { display: flex; align-items: baseline; justify-content: space-between; padding: 0 18px 10px; }
.side__k { font-size: 11px; font-weight: 600; letter-spacing: 0.15em; color: var(--cap); }
.side__n { font: 400 10.5px/1 "IBM Plex Mono", monospace; color: var(--cap); }

.side__nav { padding: 0 10px; display: flex; flex-direction: column; gap: 1px; }

.side__group {
  margin: 14px 0 4px; padding: 0 9px;
  font-size: 10.5px; font-weight: 600; letter-spacing: 0.12em; color: var(--cap);
  display: flex; align-items: baseline; gap: .4rem;
}
.side__group:first-child { margin-top: 0; }
.side__group span { font: 400 10px/1 "IBM Plex Mono", monospace; }

.side__item {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 6px 8px 6px 9px;
  border-left: 3px solid transparent;
  border-radius: 0 4px 4px 0;
  text-decoration: none; color: var(--sub);
  font-size: 13px; line-height: 1.45;
}
.side__item:hover { background: #eef0f3; color: var(--ink); }

/* 현재 위치는 색만으로 구분하지 않는다 — 표시선 + 굵기 + 배지를 함께 쓴다 */
.side__item.is-here {
  border-left-color: var(--accent);
  background: var(--here-bg);
  color: var(--ink);
  font-weight: 600;
}
.side__item.is-here .side__num { color: var(--accent); }

.side__num {
  flex: 0 0 30px; padding-top: 1px;
  text-align: right;
  font: 500 10.5px/1.5 "IBM Plex Mono", monospace;
  color: var(--cap);
}
.side__t { min-width: 0; }
.side__badge {
  margin-left: auto; flex: 0 0 auto; align-self: center;
  font-size: 10px; font-weight: 500; letter-spacing: 0.06em;
  color: var(--deep); background: var(--chip);
  border-radius: 3px; padding: 3px 5px;
}
.side__empty { margin: 10px 9px; font-size: 12.5px; color: var(--cap); }

/* ── 본문 ───────────────────────────────── */

.main { flex: 1; min-width: 0; padding: 0 32px; }
.main > * { max-width: 44rem; }

/* ── 우측 「이 페이지 안에서」 ─────────────── */

.onpage {
  flex: 0 0 var(--onpage-w); width: var(--onpage-w);
  position: sticky; top: var(--top-h);
  max-height: calc(100vh - var(--top-h));
  overflow-y: auto;
  padding: 28px 20px 24px 0;
}
.onpage__k { margin: 0 0 10px; font-size: 11px; font-weight: 600; letter-spacing: 0.12em; color: var(--cap); }
.onpage__nav { display: flex; flex-direction: column; gap: 2px; border-left: 1px solid var(--line); }
.onpage__nav a {
  padding: 4px 0 4px 12px; margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: 12.5px; line-height: 1.5;
  color: var(--cap); text-decoration: none;
}
.onpage__nav a:hover { color: var(--ink); }
.onpage__nav a.is-here { border-left-color: var(--accent); color: var(--accent); font-weight: 600; }
.onpage:not(.has-items) { visibility: hidden; }

/* ── 표지 문단 ───────────────────────────── */

.lede { padding: 2.6rem 0 1.8rem; border-bottom: 2px solid var(--ink); margin-bottom: 2rem; }
.lede h1 { margin: 0 0 .5rem; font-size: 1.85rem; letter-spacing: -.015em; color: var(--ink); }
.lede p { margin: 0; color: var(--cap); font-size: .95rem; line-height: 1.7; }

/* ── 프로젝트 줄 ─────────────────────────── */

.projects { margin-bottom: 2.5rem; }
.projects__k { margin: 0 0 .6rem; font-size: .7rem; font-weight: 600; letter-spacing: .14em; color: var(--cap); }
.projects__row { display: flex; gap: .7rem; flex-wrap: wrap; }
.proj { flex: 1 1 12rem; min-width: 0; border: 1px solid var(--line); border-radius: 6px; padding: .75rem .9rem; }
.proj p { margin: 0; }
.proj__name { font-size: 1rem; font-weight: 700; letter-spacing: -.01em; }
.proj__name a { color: var(--ink); text-decoration: none; }
.proj__name a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.proj__blurb { margin-top: .12rem !important; font-size: .78rem; color: var(--cap); }
.proj__n { margin-top: .45rem !important; font-size: .78rem; }
.proj__n a { text-decoration: none; }
.proj__n a:hover { text-decoration: underline; }

/* ── 글 목록 ─────────────────────────────── */

.feed { list-style: none; margin: 0; padding: 0; }
.feed__item { display: flex; gap: 1.1rem; padding: 1.3rem 0; border-bottom: 1px solid var(--hair); }
.feed__item:last-child { border-bottom: 0; }
.feed__date {
  flex: 0 0 6.4rem; padding-top: .35rem;
  font: 400 .78rem/1.5 "IBM Plex Mono", ui-monospace, monospace;
  color: var(--cap); font-variant-numeric: tabular-nums; white-space: nowrap;
}
.feed__body { min-width: 0; flex: 1; }

.feed__proj { margin: 0 0 .15rem !important; }
.feed__proj a, .feed__proj {
  font-size: .72rem; font-weight: 700; letter-spacing: .1em;
  color: var(--cap); text-decoration: none;
}
.feed__proj a:hover { color: var(--accent); }
.feed__proj--sm { margin: .1rem 0 0 !important; font-weight: 500; letter-spacing: .06em; }

.feed__body h2, .feed__body h3 { margin: 0 0 .35rem; font-size: 1.06rem; line-height: 1.5; letter-spacing: -.01em; }
.feed__body h3 { font-size: .98rem; font-weight: 500; }
.feed__body h2 a, .feed__body h3 a { color: var(--ink); text-decoration: none; }
.feed__body h2 a:hover, .feed__body h3 a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.feed__body p { margin: 0 0 .5rem; font-size: .9rem; line-height: 1.7; color: var(--sub); }
.feed__tags { margin: 0 !important; display: flex; gap: .35rem; flex-wrap: wrap; }
.feed--tight .feed__item { padding: .55rem 0; }

.tag {
  display: inline-block;
  font-size: .72rem; font-weight: 500; letter-spacing: .02em;
  color: var(--deep); background: var(--tagbg);
  border: 1px solid #dde3f7; border-radius: 3px;
  padding: .1rem .42rem; text-decoration: none; line-height: 1.6;
}
.tag:hover { background: #e2e8ff; color: var(--deep); }
.tag--big { font-size: .85rem; padding: .3rem .6rem; }
.tag--big span { font-family: "IBM Plex Mono", monospace; color: var(--cap); font-size: .75rem; }
.tag--proj { font-weight: 700; letter-spacing: .04em; }

.tagcloud { display: flex; flex-wrap: wrap; gap: .45rem; margin-bottom: 2rem; }
.taggroup { margin-bottom: 2.25rem; }
.taggroup h2 { font-size: 1.02rem; color: var(--accent); margin: 0 0 .4rem; padding-bottom: .4rem; border-bottom: 1px solid var(--line); }
.taggroup h2 span { font: 400 .78rem "IBM Plex Mono", monospace; color: var(--cap); margin-left: .35rem; }

.empty { color: var(--cap); font-size: .92rem; padding: 1.5rem 0; }

/* ── 글 ──────────────────────────────────── */

.post { padding-bottom: 3rem; }
.post__head { padding: 2.4rem 0 1.4rem; border-bottom: 2px solid var(--ink); margin-bottom: 2rem; }
.post__back { margin: 0 0 1rem; font-size: .85rem; }
.post__back a { text-decoration: none; }
.post__back a:hover { text-decoration: underline; }
.post__proj { margin: 0 0 .5rem; display: flex; align-items: baseline; gap: .5rem; flex-wrap: wrap; }
.post__proj a { font-size: .74rem; font-weight: 700; letter-spacing: .1em; color: var(--accent); text-decoration: none; }
.post__proj a:hover { text-decoration: underline; }
.post__proj span { font-size: .76rem; color: var(--cap); }
.post__head h1 { margin: 0 0 .7rem; font-size: 1.72rem; line-height: 1.45; letter-spacing: -.015em; color: var(--ink); }
.post__meta { margin: 0; display: flex; align-items: center; gap: .7rem; flex-wrap: wrap; }
.post__meta time { font: 400 .8rem "IBM Plex Mono", monospace; color: var(--cap); }
.post__tags { display: flex; gap: .35rem; flex-wrap: wrap; }
.post__sum { margin: .9rem 0 0; font-size: .95rem; line-height: 1.75; color: var(--sub); }

.prose { font-size: 1rem; }
.prose > * + * { margin-top: 1.15rem; }
.prose h2 {
  margin-top: 2.6rem; font-size: 1.12rem; color: var(--accent);
  padding-bottom: .4rem; border-bottom: 1px solid var(--line); letter-spacing: -.01em;
}
.prose h3 { margin-top: 2rem; font-size: 1rem; color: var(--ink); }
.prose p { color: var(--body); }
.prose strong { color: var(--ink); font-weight: 600; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose li { margin: .35rem 0; }
.prose li::marker { color: var(--cap); }
.prose blockquote { margin-left: 0; padding: .2rem 0 .2rem 1.1rem; border-left: 3px solid var(--line); color: var(--sub); }
.prose code {
  font: .85em/1.5 "IBM Plex Mono", ui-monospace, monospace;
  background: #f3f4f6; border: 1px solid var(--line); border-radius: 3px;
  padding: .08em .32em; word-break: normal;
}
.prose pre {
  background: var(--wash); border: 1px solid var(--line); border-radius: 6px;
  padding: .9rem 1rem; overflow-x: auto; font-size: .82rem; line-height: 1.7;
}
.prose pre code { background: none; border: 0; padding: 0; font-size: 1em; }
.prose img { max-width: 100%; height: auto; border-radius: 6px; border: 1px solid var(--line); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.4rem 0; }
.prose table { width: 100%; border-collapse: collapse; font-size: .88rem; display: block; overflow-x: auto; }
.prose th { text-align: left; background: var(--wash); border-bottom: 1px solid var(--line); padding: .5rem .6rem; font-size: .78rem; color: var(--cap); white-space: nowrap; }
.prose td { border-bottom: 1px solid var(--hair); padding: .5rem .6rem; vertical-align: top; }
.prose table code { white-space: nowrap; }

.post__nav { display: flex; gap: .75rem; margin-top: 3rem; }
.post__nav a {
  flex: 1; min-width: 0;
  border: 1px solid var(--line); border-radius: 6px;
  padding: .8rem .95rem; text-decoration: none; color: var(--ink);
  font-size: .9rem; line-height: 1.55;
}
.post__nav a:hover { border-color: var(--accent); }
.post__nav a span { display: block; font-size: .72rem; color: var(--cap); margin-bottom: .2rem; }
.post__next { text-align: right; }

/* ── 좁은 화면 ──────────────────────────── */

@media (max-width: 1180px) {
  .onpage { display: none; }
}

@media (max-width: 900px) {
  .top { gap: 12px; padding: 0 14px; }
  .top__drawer { display: flex; }
  .top__search { display: none; }
  .top__meta a { display: none; }
  .main { padding: 0 16px; }

  .side {
    position: fixed; top: var(--top-h); left: 0; z-index: 25;
    height: calc(100vh - var(--top-h));
    transform: translateX(-100%);
    transition: transform .18s ease;
  }
  .side.is-open { transform: none; box-shadow: 0 0 0 100vmax rgba(17, 24, 39, .35); }
}

@media (max-width: 640px) {
  .feed__item { flex-direction: column; gap: .3rem; }
  .feed__date { flex: none; padding-top: 0; }
  .post__nav { flex-direction: column; }
  .post__next { text-align: left; }
}

@media (prefers-reduced-motion: reduce) { .side { transition: none; } }

@media print {
  .top, .side, .onpage, .skip, .post__nav { display: none !important; }
  .main { padding: 0; }
}