/* ─────────────────────────────────────────────
   손정원 — 개인 사이트
   단색 · 여백 중심. 라이트/다크 모두 지원합니다.

   기본값은 운영체제 설정을 따르고,
   헤더의 버튼으로 고른 값이 있으면 <html data-theme>가 그걸 덮어씁니다.
   ───────────────────────────────────────────── */

:root {
  --ink: #16181d;
  --ink-2: #3d424b;
  --mute: #6b7280;
  --faint: #9ca3af;
  --rule: #e5e7eb;
  --fill: #f6f7f9;
  --paper: #ffffff;
  --accent: #16181d;

  --ko: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
        "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --w: 46rem;
  --w-wide: 60rem;

  color-scheme: light;
}

/* 아래 두 블록은 같은 값입니다. 순수 CSS라 한쪽으로 합칠 수 없어
   운영체제 설정(위)과 직접 고른 값(아래)에 각각 둡니다. 함께 고쳐 주세요. */

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #e8eaed;
    --ink-2: #c3c7ce;
    --mute: #9aa1ac;
    --faint: #6b7280;
    --rule: #2a2e36;
    --fill: #1b1e24;
    --paper: #131519;
    --accent: #e8eaed;

    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --ink: #e8eaed;
  --ink-2: #c3c7ce;
  --mute: #9aa1ac;
  --faint: #6b7280;
  --rule: #2a2e36;
  --fill: #1b1e24;
  --paper: #131519;
  --accent: #e8eaed;

  color-scheme: dark;
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--ko);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: -0.003em;
  word-break: keep-all;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 1rem; top: 1rem;
  z-index: 10;
  padding: 0.5rem 0.9rem;
  background: var(--ink);
  color: var(--paper);
  border-radius: 6px;
}

/* ── 헤더 ─────────────────────────────────── */

.site-header {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: 2.4rem 1.5rem 1.6rem;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 0.65rem; }
.brand-mark { font-size: 0.7rem; color: var(--faint); }
.brand-text { display: flex; align-items: baseline; gap: 0.6rem; flex-wrap: wrap; }
.brand-text strong { font-size: 1.15rem; font-weight: 700; letter-spacing: -0.02em; }
.brand-text em {
  font-style: normal;
  font-size: 0.8rem;
  color: var(--mute);
  letter-spacing: 0.01em;
}

.site-nav { display: flex; gap: 1.15rem; font-size: 0.9rem; }
.site-nav a {
  color: var(--mute);
  padding-bottom: 2px;
  border-bottom: 1.5px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
  border-bottom-color: var(--ink);
}

/* ── 아바타 (GitHub 프로필을 그대로 참조) ── */

.brand-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--fill);
  object-fit: cover;
  flex: none;
  align-self: center;
}

.page-head.with-avatar { display: flex; flex-direction: column; align-items: flex-start; }
.page-avatar {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: var(--fill);
  object-fit: cover;
  margin-bottom: 1.1rem;
}

/* ── 언어 · 테마 전환 ─────────────────────── */

.header-right { display: flex; align-items: center; gap: 1.15rem; }
.header-tools { display: flex; align-items: center; gap: 0.75rem; }

.lang-toggle,
.theme-toggle {
  position: relative;
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 1.8rem;
  border: 1px solid var(--rule);
  border-radius: 5px;
  color: var(--mute);
  background: none;
  touch-action: manipulation;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

/* 테두리는 작게 두되, 손끝으로 눌리는 영역은 44px로 넓힙니다.
   이게 없으면 29px짜리 버튼이라 휴대폰에서 자꾸 빗나갑니다.
   위 gap(0.75rem)은 두 영역이 겹치지 않을 만큼 띄워 둔 값입니다. */
.lang-toggle::after,
.theme-toggle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 44px;
  height: 44px;
  transform: translate(-50%, -50%);
}
.lang-toggle:hover,
.theme-toggle:hover {
  color: var(--ink);
  border-color: var(--faint);
  background: var(--fill);
}

.lang-toggle {
  padding: 0 0.55rem;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.theme-toggle {
  width: 1.8rem;
  padding: 0;
  font: inherit;
  cursor: pointer;
}
.theme-toggle svg {
  display: block;
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* 지금 화면이 밝으면 달을, 어두우면 해를 보여줍니다 — 누르면 바뀔 모습입니다. */
.theme-toggle .i-sun { display: none; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .i-sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .i-moon { display: none; }
}

:root[data-theme="dark"] .theme-toggle .i-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .i-moon { display: none; }

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

.site-main {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: 1rem 1.5rem 5rem;
  border-top: 1px solid var(--rule);
}

.page { max-width: var(--w); }
.page.wide { max-width: none; }

.page-head { padding: 3rem 0 2rem; }
.page-head h1 {
  margin: 0;
  font-size: clamp(1.7rem, 4.5vw, 2.4rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.035em;
}
.page-head .lede {
  margin: 0.9rem 0 0;
  color: var(--mute);
  font-size: 1rem;
}

.post-meta {
  margin: 0 0 0.7rem;
  font-size: 0.82rem;
  color: var(--mute);
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
}
.tags { display: inline-flex; gap: 0.35rem; flex-wrap: wrap; }
.tag {
  font-size: 0.72rem;
  padding: 0.12rem 0.5rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--mute);
}

/* ── 프로즈 ───────────────────────────────── */

.prose { font-size: 1rem; color: var(--ink-2); }

.prose h2 {
  margin: 3.2rem 0 1rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--rule);
  font-size: 1.32rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.025em;
  line-height: 1.4;
}
.prose h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }

.prose h3 {
  margin: 2.3rem 0 0.8rem;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.prose h4 {
  margin: 1.8rem 0 0.6rem;
  font-size: 0.97rem;
  font-weight: 700;
  color: var(--ink);
}

.prose p { margin: 0 0 1.1rem; }
.prose strong { color: var(--ink); font-weight: 700; }
.prose em { font-style: normal; color: var(--mute); }

.prose a {
  color: var(--ink);
  border-bottom: 1px solid var(--faint);
  transition: border-color 0.15s;
}
.prose a:hover { border-bottom-color: var(--ink); }

.prose ul, .prose ol { margin: 0 0 1.2rem; padding-left: 1.15rem; }
.prose li { margin-bottom: 0.55rem; }
.prose li::marker { color: var(--faint); }

.prose hr {
  margin: 2.8rem 0;
  border: 0;
  border-top: 1px solid var(--rule);
}

.prose blockquote {
  margin: 1.4rem 0;
  padding: 0.2rem 0 0.2rem 1.1rem;
  border-left: 2px solid var(--rule);
  color: var(--mute);
}

.prose code {
  font-family: var(--mono);
  font-size: 0.855em;
  padding: 0.14em 0.4em;
  background: var(--fill);
  border-radius: 4px;
  word-break: break-all;
}
.prose pre {
  margin: 1.3rem 0;
  padding: 1.05rem 1.2rem;
  background: var(--fill);
  border: 1px solid var(--rule);
  border-radius: 8px;
  overflow-x: auto;
  font-size: 0.86rem;
  line-height: 1.65;
}
.prose pre code { padding: 0; background: none; word-break: normal; }

/* 표는 좁은 화면에서 가로 스크롤 */
.prose .table-wrap { overflow-x: auto; margin: 1.3rem 0; }
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 30rem;
}
.prose th, .prose td {
  padding: 0.62rem 0.8rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--rule);
}
.prose th {
  font-weight: 700;
  color: var(--ink);
  font-size: 0.82rem;
  letter-spacing: 0.01em;
  border-bottom-width: 1.5px;
  white-space: nowrap;
}
.prose tbody tr:last-child td { border-bottom: 0; }

.prose img { max-width: 100%; height: auto; border-radius: 8px; }

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

.home-head { padding: 3.4rem 0 2.4rem; max-width: var(--w); }
.home-head h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.32;
}
.home-head p { margin: 0; color: var(--mute); font-size: 1.02rem; }

.post-list { list-style: none; margin: 0; padding: 0; max-width: var(--w); }
.post-list li { border-top: 1px solid var(--rule); }
.post-list a {
  display: block;
  padding: 1.5rem 0;
  transition: opacity 0.15s;
}
.post-list a:hover { opacity: 0.62; }
.post-list time { font-size: 0.8rem; color: var(--faint); font-variant-numeric: tabular-nums; }
.post-list h2 {
  margin: 0.35rem 0 0.35rem;
  font-size: 1.13rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
  line-height: 1.45;
}
.post-list p { margin: 0; color: var(--mute); font-size: 0.92rem; }

.empty {
  border-top: 1px solid var(--rule);
  padding: 2.6rem 0;
  color: var(--mute);
  max-width: var(--w);
}

/* ── 이력 페이지 ──────────────────────────── */

.resume-actions {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin: 1.4rem 0 0;
}
.btn {
  display: inline-block;
  padding: 0.5rem 0.95rem;
  border: 1px solid var(--rule);
  border-radius: 7px;
  font-size: 0.87rem;
  color: var(--ink);
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { background: var(--fill); border-color: var(--faint); }
.btn.primary { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn.primary:hover { opacity: 0.85; background: var(--ink); }

/* ── 글 하단 이동 ─────────────────────────── */

.post-nav {
  display: flex;
  gap: 1rem;
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  flex-wrap: wrap;
}
.post-nav-item { flex: 1 1 12rem; }
.post-nav-item.next { text-align: right; }
.post-nav-item span { display: block; font-size: 0.76rem; color: var(--faint); }
.post-nav-item strong {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--ink);
}
.post-nav-item:hover strong { opacity: 0.62; }

/* ── 푸터 ─────────────────────────────────── */

.site-footer {
  border-top: 1px solid var(--rule);
  margin-top: auto;
}
.footer-inner {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: 2.2rem 1.5rem 3rem;
  font-size: 0.85rem;
  color: var(--mute);
}
.footer-name { margin: 0 0 0.4rem; font-weight: 700; color: var(--ink); }
.footer-links { margin: 0 0 0.5rem; display: flex; gap: 0.5rem; flex-wrap: wrap; }
.footer-links a { border-bottom: 1px solid transparent; }
.footer-links a:hover { border-bottom-color: var(--faint); }
.footer-meta { margin: 0; font-size: 0.8rem; color: var(--faint); }

/* ── 인쇄 ─────────────────────────────────── */

@media print {
  .site-nav, .site-footer, .resume-actions, .post-nav, .skip-link,
  .lang-toggle, .theme-toggle { display: none; }
  .site-main { border-top: 0; }
  body { font-size: 10.5pt; }
  .prose h2 { page-break-after: avoid; }
  .prose table { page-break-inside: avoid; }
}

@media (max-width: 640px) {
  .site-header { padding-top: 1.8rem; align-items: flex-start; flex-direction: column; gap: 1rem; }
  .site-nav { gap: 1rem; }
  .header-right { width: 100%; justify-content: space-between; }
  .page-head { padding: 2.2rem 0 1.6rem; }
}
