/* ==========================================================================
   빌캠교실 블로그 — Brunch × Notion
   공용 ../styles.css 위에 블로그 전용 컴포넌트만 얹음
   ========================================================================== */

/* -------- 1. Masthead (블로그 제호) -------------------------------------- */
.blog-masthead {
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--line);
}
.masthead-vol {
  display: inline-flex; align-items: center; gap: 14px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.26em; text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 22px;
}
.masthead-vol::before {
  content: ""; width: 32px; height: 1px; background: var(--accent);
}
.blog-masthead h1 {
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.12;
  letter-spacing: -0.045em;
  margin: 0 0 20px;
  max-width: 780px;
}
.blog-masthead h1 em {
  font-style: italic; color: var(--accent-ink); font-weight: 900;
}
.blog-masthead .lead {
  font-size: 18px; line-height: 1.75;
  color: var(--ink-muted);
  max-width: 620px;
  margin: 0;
}

/* -------- 2. 카테고리 필터 (상단 칩) -------------------------------------- */
.cat-filter {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 24px 0;
  margin: 0 0 8px;
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
  background: var(--paper);
}
.cat-chip {
  display: inline-flex; align-items: baseline; gap: 8px;
  padding: 7px 14px;
  font-size: 13px; font-weight: 500;
  color: var(--ink-muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s var(--ease);
}
.cat-chip:hover { color: var(--ink); border-color: var(--ink-muted); }
.cat-chip.is-active {
  background: var(--ink); color: var(--paper);
  border-color: var(--ink);
}
.cat-chip .c-count {
  font-family: var(--font-mono); font-size: 10px; font-weight: 500;
  opacity: 0.7;
}
.cat-chip.is-active .c-count { opacity: 0.9; }

/* -------- 3. Featured post ---------------------------------------------- */
.featured {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
  margin-bottom: 0;
}
.featured-label {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 18px;
}
.featured-label::before {
  content: "✦"; color: var(--accent); font-size: 14px;
}
.featured-cat {
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--accent);
}
.featured h2 {
  margin: 10px 0 14px;
  font-size: clamp(30px, 4.2vw, 46px);
  line-height: 1.2;
  letter-spacing: -0.035em;
  max-width: 820px;
}
.featured h2 a { color: inherit; transition: color 0.15s var(--ease); }
.featured h2 a:hover { color: var(--accent-ink); }
.featured .f-excerpt {
  margin: 0;
  font-size: 17px; line-height: 1.75;
  color: var(--ink-muted);
  max-width: 620px;
}
.featured .f-meta {
  margin-top: 18px;
  font-family: var(--font-mono); font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
  display: inline-flex; align-items: center; gap: 10px;
}
.featured .f-meta .sep { color: var(--line); }
.featured .f-read {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 20px;
  font-family: var(--font-serif); font-size: 15px; font-weight: 700;
  color: var(--ink);
  border-bottom: 2px solid var(--ink);
  padding-bottom: 2px;
  transition: all 0.15s var(--ease);
}
.featured .f-read:hover { color: var(--accent-ink); border-color: var(--accent); transform: translateX(3px); }

/* -------- 4. Post grid (Brunch 식 2-col) --------------------------------- */
.post-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}
.post-card {
  padding: 32px 24px 32px 0;
  border-bottom: 1px solid var(--line);
  border-right: 1px dashed var(--line);
  transition: background 0.15s var(--ease);
}
.post-card:nth-child(2n) {
  border-right: 0;
  padding: 32px 0 32px 24px;
  border-left: 1px dashed var(--line);
  margin-left: -1px;
}
.post-card:hover { background: var(--paper-warm); }
.post-card.is-hidden { display: none; }
.post-card > a { display: block; color: inherit; }

.p-cat {
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--accent);
  display: inline-block;
  margin-bottom: 12px;
}
.post-card h3 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: -0.025em;
}
.post-card h3 a { color: inherit; transition: color 0.15s var(--ease); }
.post-card h3 a:hover { color: var(--accent-ink); }
.p-excerpt {
  margin: 0;
  font-size: 15px; line-height: 1.7;
  color: var(--ink-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.p-meta {
  margin-top: 14px;
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
}

/* -------- 5. Naver CTA 블록 ---------------------------------------------- */
.naver-block {
  margin: 48px 0 0;
  padding: 32px 32px 28px;
  background: var(--paper-warm);
  border-left: 3px solid #03c75a;
  border-radius: 0 6px 6px 0;
}
.naver-label {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: #028c42;
  margin: 0 0 10px;
}
.naver-label::before {
  content: "N"; display: grid; place-items: center;
  width: 22px; height: 22px;
  background: #03c75a; color: #fff;
  font-family: var(--font-sans); font-weight: 900;
  border-radius: 5px;
  font-size: 13px; letter-spacing: 0;
}
.naver-block h3 {
  margin: 0 0 8px;
  font-size: 22px;
  letter-spacing: -0.025em;
}
.naver-block p {
  margin: 0 0 18px;
  font-size: 15px; color: var(--ink-muted);
}
.naver-block .n-go {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-serif); font-weight: 700; font-size: 15px;
  color: var(--ink);
  border-bottom: 2px solid var(--ink);
  padding-bottom: 2px;
  transition: all 0.15s var(--ease);
}
.naver-block .n-go:hover {
  color: #028c42; border-color: #03c75a; transform: translateX(3px);
}

/* ==========================================================================
   Post single page (글 상세)
   ========================================================================== */

.breadcrumb {
  display: flex; align-items: center; flex-wrap: wrap; gap: 4px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 40px;
}
.breadcrumb a { color: var(--ink-muted); transition: color 0.15s var(--ease); }
.breadcrumb a:hover { color: var(--accent-ink); }
.breadcrumb .sep { color: var(--ink-soft); margin: 0 8px; }

.post-head {
  padding: 8px 0 44px;
  border-bottom: 1px solid var(--line);
  margin: 0 0 48px;
}
.post-cat-label {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.26em; text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 22px;
}
.post-cat-label::before {
  content: ""; width: 26px; height: 1px; background: var(--accent);
}
.post-title {
  margin: 0 0 22px;
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.18;
  letter-spacing: -0.04em;
  max-width: 820px;
}
.post-sub {
  margin: 0 0 28px;
  font-size: 18px;
  line-height: 1.75;
  color: var(--ink-muted);
  max-width: var(--reading-col);
}
.post-meta-row {
  display: flex; align-items: center; flex-wrap: wrap; gap: 14px;
  padding-top: 22px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono); font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-muted);
}
.post-meta-row .author {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-sans); font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.post-meta-row .author::before {
  content: "빌";
  display: grid; place-items: center;
  width: 26px; height: 26px;
  background: var(--ink); color: var(--paper);
  border-radius: 50%;
  font-family: var(--font-serif); font-size: 12px; font-weight: 700;
  letter-spacing: 0;
}
.post-meta-row .sep { color: var(--ink-soft); }

/* -------- Post body (읽기 본문) ----------------------------------------- */
.post-body {
  font-size: 17px;
  line-height: 1.88;
  color: var(--ink);
  max-width: var(--reading-col);
}
.post-body .hook {
  font-family: var(--font-serif);
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 500;
  line-height: 1.55;
  letter-spacing: -0.025em;
  font-style: italic;
  color: var(--ink);
  padding: 0 0 0 26px;
  border-left: 3px solid var(--accent);
  margin: 0 0 44px;
}
.post-body .hook br { display: none; }
.post-body p { margin: 0 0 20px; }
.post-body h2 {
  position: relative;
  margin: 52px 0 18px;
  padding-top: 24px;
  font-size: 26px;
  letter-spacing: -0.03em;
}
.post-body h2::before {
  content: ""; position: absolute; top: 0; left: 0;
  width: 32px; height: 2px; background: var(--accent);
}
.post-body h3 {
  margin: 36px 0 12px;
  font-size: 20px;
  letter-spacing: -0.025em;
}
.post-body ul, .post-body ol {
  margin: 0 0 22px;
  padding-left: 24px;
  list-style: disc;
}
.post-body ol { list-style: decimal; }
.post-body li { margin-bottom: 8px; padding-left: 4px; }
.post-body strong, .post-body b {
  color: var(--ink); font-weight: 700;
}
.post-body a {
  color: var(--accent-ink);
  border-bottom: 1px solid var(--accent-soft);
  padding-bottom: 1px;
  transition: border-color 0.15s var(--ease);
}
.post-body a:hover { border-color: var(--accent); }
.post-body .callout {
  margin: 32px 0;
  padding: 22px 26px;
  background: var(--paper-warm);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  font-size: 15px;
  line-height: 1.78;
}
.post-body .callout b {
  display: inline-block;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}
.post-body mark {
  background: var(--highlight);
  padding: 0 4px; border-radius: 2px;
}

/* -------- Post CTA ------------------------------------------------------ */
.post-cta-block {
  margin-top: 72px;
  padding: 36px 40px;
  background: var(--paper-warm);
  border-radius: 6px;
  max-width: var(--main-max);
}
.post-cta-block h2 {
  margin: 0 0 10px;
  font-size: 24px;
  letter-spacing: -0.025em;
}
.post-cta-block p {
  margin: 0 0 20px;
  font-size: 15px; color: var(--ink-muted);
}
.post-cta-row {
  display: flex; flex-wrap: wrap; gap: 10px;
}
.cta-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px;
  font-size: 14px; font-weight: 600;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  transition: all 0.15s var(--ease);
}
.cta-btn:hover {
  border-color: var(--ink-muted);
  background: #fff;
}
.cta-btn.primary {
  background: var(--ink); color: var(--paper);
  border-color: var(--ink);
}
.cta-btn.primary:hover {
  background: var(--accent-ink);
  border-color: var(--accent-ink);
}

/* -------- 관련 글 ------------------------------------------------------- */
.related-block {
  margin-top: 72px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
  max-width: var(--main-max);
}
.related-block h3 {
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--ink-muted);
  margin: 0 0 22px;
}
.related-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}
.related-grid a {
  display: block;
  padding: 24px 20px 24px 0;
  border-bottom: 1px solid var(--line);
  border-right: 1px dashed var(--line);
  transition: background 0.15s var(--ease);
  color: inherit;
}
.related-grid a:last-child { border-right: 0; }
.related-grid a:hover { background: var(--paper-warm); }
.related-grid a:not(:first-child) { padding-left: 20px; }
.related-grid span {
  display: block;
  font-family: var(--font-mono); font-size: 10px; font-weight: 500;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.related-grid strong {
  display: block;
  font-family: var(--font-serif); font-size: 17px; font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.025em;
}

/* -------- 사이드바 카테고리 (네이비 사이드바용) --------------------------- */
.side-cats { display: flex; flex-direction: column; gap: 2px; }
.side-cat {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px; align-items: baseline;
  padding: 7px 8px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--sidebar-ink);
  transition: background 0.15s var(--ease), color 0.15s var(--ease);
  cursor: pointer;
}
.side-cat:hover { background: rgba(255, 255, 255, 0.06); color: #fff; }
.side-cat.is-active {
  background: rgba(255, 255, 255, 0.09);
  color: #fff;
  font-weight: 600;
}
.side-cat .c-count {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--sidebar-soft);
}
.side-cat.is-active .c-count { color: var(--sidebar-accent); }

/* -------- 반응형 ------------------------------------------------------- */
@media (max-width: 720px) {
  .post-grid { grid-template-columns: 1fr; }
  .post-card, .post-card:nth-child(2n) {
    padding: 24px 0;
    border-right: 0; border-left: 0; margin-left: 0;
  }
  .related-grid { grid-template-columns: 1fr; }
  .related-grid a, .related-grid a:not(:first-child) {
    padding: 20px 0; border-right: 0;
  }
  .post-cta-block { padding: 24px 20px; }
  .naver-block { padding: 24px 22px; }
  .cat-filter { padding: 16px 0; gap: 6px; }
  .cat-chip { padding: 5px 12px; font-size: 12px; }
  .post-body { font-size: 16px; }
  .post-body .hook { padding-left: 18px; }
}