/* ══════════════════════════════════════════
   youngkwang.kim — Global CSS
   쿨 뉴트럴 + 딥 블루 액센트, 타이포·여백 중심
   ══════════════════════════════════════════ */

:root {
  --bg: #FFFFFF;
  --bg-soft: #F5F7F9;
  --text: #191C20;
  --text-secondary: #59626D;
  --text-tertiary: #8A93A0;
  --accent: #1B4965;
  --accent-strong: #143850;
  --border: #E4E8ED;
  --border-strong: #C9D0D8;
  --col: 720px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, system-ui, Roboto, "Apple SD Gothic Neo", "Segoe UI", "Malgun Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
  overflow-wrap: break-word;
}

a { color: inherit; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
::selection { background: var(--accent); color: #fff; }

/* ── Skip link (키보드 사용자 본문 바로가기) ── */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 2000;
  background: var(--accent);
  color: #fff;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 0 0 8px 0;
  text-decoration: none;
}
.skip-link:focus { left: 0; }

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  transition: box-shadow 0.3s;
}
.navbar.scrolled { box-shadow: 0 2px 16px rgba(20,40,60,0.06); }

.navbar-inner {
  max-width: var(--col);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 60px;
}

.navbar-logo {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--text);
}
.navbar-logo:hover { color: var(--accent); }

.navbar-menu { display: flex; gap: 26px; }
.navbar-menu a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 6px 0;
  transition: color 0.15s;
}
.navbar-menu a:hover { color: var(--text); }
.navbar-menu a.active { color: var(--accent); font-weight: 700; }

.navbar-toggle {
  display: none;
  background: none;
  border: 0;
  width: 40px;
  height: 40px;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.navbar-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
.navbar.open .navbar-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar.open .navbar-toggle span:nth-child(2) { opacity: 0; }
.navbar.open .navbar-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── 공통 레이아웃 ── */
.page-main {
  max-width: var(--col);
  margin: 0 auto;
  padding: 132px 24px 0;
}

.page-head { margin-bottom: 44px; }
.page-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
}
.page-title {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-top: 10px;
}
.page-subhead {
  font-size: 17px;
  color: var(--text-secondary);
  margin-top: 14px;
  max-width: 34em;
}

/* ── 본문 타이포 (prose) ── */
.prose { font-size: 16.5px; }
.prose p { margin: 18px 0; }
.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.prose a:hover { color: var(--accent-strong); }
.prose strong { font-weight: 700; }
.prose h2 {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 56px 0 18px;
  padding-top: 30px;
  border-top: 1px solid var(--border);
}
.prose h3 {
  font-size: 17.5px;
  font-weight: 700;
  margin: 34px 0 12px;
}
.prose ul, .prose ol { padding-left: 22px; margin: 18px 0; }
.prose li { margin: 8px 0; }
.prose blockquote {
  border-left: 2px solid var(--border-strong);
  padding: 4px 0 4px 18px;
  color: var(--text-secondary);
  margin: 22px 0;
}
.prose img { max-width: 100%; height: auto; border-radius: 10px; }
.prose figure { margin: 28px 0; }
.prose figcaption {
  font-size: 13.5px;
  color: var(--text-tertiary);
  margin-top: 10px;
  text-align: center;
}
.prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 6px;
}
.prose pre {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  overflow-x: auto;
  margin: 22px 0;
  line-height: 1.6;
}
.prose pre code { background: none; border: 0; padding: 0; font-size: 13.5px; }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 40px 0; }

/* ── 홈: 히어로 ── */
.hero {
  max-width: var(--col);
  margin: 0 auto;
  padding: 168px 24px 8px;
}
.hero-name {
  font-size: 46px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
}
.hero-name-en {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-top: 10px;
}
.hero-statement {
  font-size: 18.5px;
  line-height: 1.8;
  margin-top: 30px;
  max-width: 32em;
}
.hero-statement a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 36px;
}
.hero-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.hero-link:hover { border-color: var(--accent); color: var(--accent); }
.hero-link.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.hero-link.primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); color: #fff; }

/* ── 홈: 섹션 ── */
.home-section {
  max-width: var(--col);
  margin: 0 auto;
  padding: 64px 24px 0;
}
.section-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  padding-top: 26px;
  border-top: 1px solid var(--border);
}
.section-body { margin-top: 18px; }
.section-body > p { font-size: 16.5px; max-width: 36em; }

.now-card {
  display: block;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px 26px;
  margin-top: 22px;
  text-decoration: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.now-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 24px rgba(27,73,101,0.08);
}
.now-card-title {
  font-size: 17px;
  font-weight: 700;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.now-card-domain { font-size: 13.5px; font-weight: 600; color: var(--accent); }
.now-card-desc {
  font-size: 15px;
  color: var(--text-secondary);
  margin-top: 8px;
  line-height: 1.7;
}

.career-brief { list-style: none; margin-top: 6px; }
.career-brief li {
  display: grid;
  grid-template-columns: 118px 1fr;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.career-brief li:last-child { border-bottom: 0; }
.career-years {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  padding-top: 1px;
}
.career-role { display: block; font-size: 15.5px; font-weight: 600; }
.career-note { display: block; font-size: 14.5px; color: var(--text-secondary); margin-top: 4px; line-height: 1.65; }

.recent-list { list-style: none; margin-top: 6px; }
.recent-list a {
  display: grid;
  grid-template-columns: 118px 1fr;
  gap: 18px;
  padding: 15px 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
}
.recent-list li:last-child a { border-bottom: 0; }
.recent-date { font-size: 14px; color: var(--text-tertiary); font-variant-numeric: tabular-nums; padding-top: 2px; }
.recent-title { font-size: 16px; font-weight: 600; display: block; }
.recent-list a:hover .recent-title { color: var(--accent); }
.recent-subtitle { font-size: 14.5px; color: var(--text-secondary); display: block; margin-top: 4px; }

.more-link {
  display: inline-block;
  margin-top: 18px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}
.more-link:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ── 소개: 타임라인 ── */
.timeline { list-style: none; margin: 24px 0 8px; }
.timeline li {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 20px;
  padding: 13px 0;
  border-bottom: 1px solid var(--border);
}
.timeline li:last-child { border-bottom: 0; }
.timeline-year {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  padding-top: 2px;
}
.timeline-body { font-size: 15.5px; line-height: 1.7; }
.timeline-body strong { font-weight: 700; }
.timeline-note { color: var(--text-secondary); }

/* ── 소개: 하이라이트 카드 ── */
.highlight-list { display: grid; gap: 14px; margin: 26px 0 8px; }
.highlight {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 24px;
}
.highlight h3 { font-size: 16px; font-weight: 700; margin: 0 0 8px; }
.highlight p { font-size: 14.5px; color: var(--text-secondary); margin: 0; line-height: 1.7; }

/* ── 프로젝트 카드 ── */
.project-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 26px 28px;
  margin: 20px 0;
}
.project-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
/* .prose h2 규칙(상단 보더·여백)이 카드 안 제목에 적용되지 않도록 명시 해제 */
.prose h2.project-title { font-size: 18px; font-weight: 700; margin: 0; padding-top: 0; border-top: 0; }
.project-title { font-size: 18px; font-weight: 700; margin: 0; }
.project-title a { text-decoration: none; color: var(--text); }
.project-title a:hover { color: var(--accent); }
.project-period { font-size: 13.5px; color: var(--text-tertiary); font-variant-numeric: tabular-nums; }
.project-desc { font-size: 15.5px; color: var(--text); margin-top: 12px; line-height: 1.75; }
.project-meta { font-size: 13.5px; color: var(--text-tertiary); margin-top: 14px; line-height: 1.7; }
.project-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}
.project-link:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ── 글 목록 ── */
.post-list { list-style: none; margin-top: 4px; }
.post-list-item a {
  display: grid;
  grid-template-columns: 118px 1fr;
  gap: 18px;
  padding: 19px 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
}
.post-list-date { font-size: 14px; color: var(--text-tertiary); font-variant-numeric: tabular-nums; padding-top: 3px; }
.post-list-title { font-size: 17px; font-weight: 600; display: block; line-height: 1.5; }
.post-list-item a:hover .post-list-title { color: var(--accent); }
.post-list-subtitle { font-size: 14.5px; color: var(--text-secondary); display: block; margin-top: 5px; }

.pagination { display: flex; gap: 8px; margin-top: 40px; }
.page-num {
  min-width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
}
.page-num:hover { border-color: var(--accent); color: var(--accent); }
.page-num.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ── 개별 글 ── */
.post-head { margin-bottom: 8px; }
.post-meta { font-size: 14px; color: var(--text-tertiary); }
.post-meta a { color: var(--accent); text-decoration: none; font-weight: 600; }
.post-meta a:hover { text-decoration: underline; text-underline-offset: 3px; }
.meta-dot { margin: 0 8px; }
.post-title {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.35;
  margin-top: 12px;
}
.post-subtitle { font-size: 17px; color: var(--text-secondary); margin-top: 12px; }
.post-head + .prose { margin-top: 30px; }

.post-nav { display: grid; gap: 12px; margin-top: 64px; }
.post-nav-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  text-decoration: none;
  transition: border-color 0.15s;
}
.post-nav-item:hover { border-color: var(--accent); }
.post-nav-label { display: block; font-size: 12.5px; font-weight: 700; color: var(--text-tertiary); }
.post-nav-title { display: block; font-size: 15.5px; font-weight: 600; margin-top: 4px; }
.post-nav-item:hover .post-nav-title { color: var(--accent); }

/* ── 푸터 ── */
.site-footer {
  max-width: var(--col);
  margin: 96px auto 0;
  padding: 30px 24px 52px;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-secondary);
}
.footer-links { display: flex; flex-wrap: wrap; gap: 4px 10px; }
.footer-links a { text-decoration: none; color: var(--text-secondary); }
.footer-links a:hover { color: var(--accent); }
.footer-dot { color: var(--border-strong); }
.footer-external { margin-top: 10px; font-size: 13.5px; color: var(--text-tertiary); }
.footer-external a { color: var(--text-tertiary); }

/* ── 반응형 ── */
@media (max-width: 640px) {
  .navbar-toggle { display: flex; }
  .navbar-menu {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: #FFFFFF;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 24px rgba(20,40,60,0.08);
    padding: 8px 24px 16px;
  }
  .navbar.open .navbar-menu { display: flex; }
  .navbar-menu a { padding: 12px 0; font-size: 16px; }

  .hero { padding-top: 128px; }
  .hero-name { font-size: 36px; }
  .hero-statement { font-size: 17px; }
  .page-main { padding-top: 108px; }
  .page-title { font-size: 28px; }
  .post-title { font-size: 25px; }
  .prose { font-size: 16px; }
  .prose h2 { font-size: 19.5px; margin-top: 44px; }

  .career-brief li,
  .recent-list a,
  .post-list-item a,
  .timeline li { grid-template-columns: 1fr; gap: 4px; }
  .home-section { padding-top: 48px; }
}