/* ============================================================
   codechains — 사이트 스타일 (원본 소스, 커밋 대상)
   build.js가 이 폴더(assets/)를 site/assets/ 로 복사합니다.
   HTML은 /assets/style.css 로 참조합니다.
   ============================================================ */

/* ---------- 테마 토큰 ---------- */
:root,
:root[data-theme="dark"] {
  --bg: #0e1116;
  --bg-soft: #141922;
  --card: #161c26;
  --card-hover: #1b2230;
  --border: #232b38;
  --text: #e6ebf3;
  --muted: #9aa7bd;
  --accent: #6ee7b7;
  --accent-2: #7aa2ff;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .28);
  --ring: rgba(122, 162, 255, .45);
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #ffffff;
  --bg-soft: #f5f7fa;
  --card: #ffffff;
  --card-hover: #f7f9fc;
  --border: #e2e8f0;
  --text: #16202e;
  --muted: #5a6b83;
  --accent: #0f9d76;
  --accent-2: #3b6fe0;
  --shadow: 0 1px 2px rgba(16, 32, 55, .06), 0 8px 24px rgba(16, 32, 55, .07);
  --ring: rgba(59, 111, 224, .35);
  color-scheme: light;
}

/* ---------- 기본 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Pretendard",
    "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: -.01em;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

img { max-width: 100%; height: auto; }

a {
  color: var(--accent-2);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
  border-radius: 6px;
}

.wrap {
  width: 100%;
  max-width: 760px;
  margin-inline: auto;
  padding-inline: 22px;
}

/* ---------- 헤더 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg); /* color-mix 미지원 브라우저 대비 */
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 62px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--text);
  font-weight: 700;
  font-size: 1.53rem; /* 기존 1.02rem × 1.5 */
  letter-spacing: -.02em;
}
.brand:hover { text-decoration: none; opacity: .85; }

.logo { width: 26px; height: 26px; display: block; }

.nav {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: .93rem;
}

.nav a { color: var(--muted); }
.nav a:hover { color: var(--text); text-decoration: none; }

.nav .sep {
  width: 1px;
  height: 16px;
  background: var(--border);
}

.iconbtn {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  width: 32px;
  height: 32px;
  border-radius: 9px;
  cursor: pointer;
  font-size: .95rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background .15s ease, border-color .15s ease;
}
.iconbtn:hover { background: var(--card-hover); border-color: var(--accent-2); }

/* ---------- 메인 ---------- */
main.wrap {
  flex: 1;
  padding-block: 44px 72px;
}

/* ---------- 히어로 ---------- */
.hero { padding-block: 26px 40px; }

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 1.22;
  letter-spacing: -.035em;
  font-weight: 800;
}

.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 1.06rem;
  max-width: 56ch;
}

.grad {
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

/* ---------- 버튼 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .62rem 1.15rem;
  border-radius: 10px;
  border: 1px solid transparent;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform .12s ease, opacity .15s ease, background .15s ease, border-color .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  color: #0b0f14;
}
.btn-primary:hover { opacity: .9; }

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent-2); background: var(--bg-soft); }

/* ---------- 섹션 제목 ---------- */
.section-title {
  margin: 8px 0 18px;
  font-size: .82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--muted);
  scroll-margin-top: 80px;
}

/* ---------- 글 목록 ---------- */
.postlist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.post-item {
  display: block;
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
  color: var(--text);
  transition: background .15s ease, border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.post-item:hover {
  text-decoration: none;
  background: var(--card-hover);
  border-color: var(--accent-2);
  border-color: color-mix(in srgb, var(--accent-2) 45%, var(--border));
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.post-item time {
  display: block;
  font-size: .82rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.post-item h2 {
  margin: .3rem 0 .4rem;
  font-size: 1.28rem;
  line-height: 1.35;
  letter-spacing: -.02em;
  font-weight: 700;
}

.post-item p {
  margin: 0;
  color: var(--muted);
  font-size: .96rem;
}

/* ---------- 태그 ---------- */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: .7rem;
}

.tag {
  font-size: .76rem;
  padding: .16rem .6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--muted);
  letter-spacing: .01em;
}

/* ---------- 본문(글/소개) ---------- */
.article { padding-bottom: 8px; }

.article-head {
  padding-bottom: 22px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--border);
}

.article-head time {
  font-size: .85rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* 제목 위 한 줄: 날짜 · 글쓴이 — 읽기 전에 누가 썼는지 보이도록 */
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-size: .85rem;
  color: var(--muted);
}
.article-meta .dot { color: var(--border); }
.article-meta .byline {
  color: var(--muted);
  font-weight: 600;
}
.article-meta .byline:hover { color: var(--accent-2); text-decoration: none; }

.article-head h1 {
  margin: .35rem 0 0;
  font-size: clamp(1.7rem, 4.6vw, 2.35rem);
  line-height: 1.3;
  letter-spacing: -.03em;
  font-weight: 800;
}

.prose > *:first-child { margin-top: 0; }
.prose > *:last-child { margin-bottom: 0; }

.prose h2 {
  margin: 2.4rem 0 .9rem;
  font-size: 1.42rem;
  line-height: 1.4;
  letter-spacing: -.02em;
  font-weight: 700;
}

.prose h3 {
  margin: 1.9rem 0 .7rem;
  font-size: 1.14rem;
  font-weight: 700;
}

.prose p { margin: 0 0 1.15rem; }

.prose ul,
.prose ol {
  margin: 0 0 1.15rem;
  padding-left: 1.35rem;
}
.prose li { margin-bottom: .45rem; }
.prose li::marker { color: var(--accent); }

.prose strong { font-weight: 700; color: var(--text); }

.prose a { text-decoration: underline; text-underline-offset: 3px; }

.prose blockquote {
  margin: 1.6rem 0;
  padding: .9rem 1.2rem;
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
  background: var(--bg-soft);
  color: var(--muted);
}
.prose blockquote p:last-child { margin-bottom: 0; }

.prose hr {
  margin: 2.6rem 0;
  border: 0;
  border-top: 1px solid var(--border);
}

.prose code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: .88em;
  padding: .15em .4em;
  border-radius: 6px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
}

.prose pre {
  margin: 1.5rem 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  border-radius: 12px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  line-height: 1.6;
}
.prose pre code {
  padding: 0;
  border: 0;
  background: none;
  font-size: .875rem;
}

.prose img { border-radius: 12px; }

.prose table {
  width: 100%;
  margin: 1.5rem 0;
  border-collapse: collapse;
  font-size: .94rem;
}
.prose th,
.prose td {
  padding: .55rem .7rem;
  border: 1px solid var(--border);
  text-align: left;
}
.prose th { background: var(--bg-soft); font-weight: 700; }

/* ---------- 저자 카드 (글 하단) ---------- */
.author-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-top: 48px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
}

.author-avatar {
  flex: 0 0 auto;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
}
.author-avatar .logo { width: 28px; height: 28px; }

.author-body { min-width: 0; }

.author-label {
  margin: 0;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--muted);
}

.author-name {
  margin: .15rem 0 .4rem;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -.02em;
}

.author-bio {
  margin: 0;
  color: var(--muted);
  font-size: .93rem;
  line-height: 1.65;
}

.author-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: .8rem 0 0;
  font-size: .88rem;
}
.author-links a { color: var(--accent-2); }
.author-links a:hover { text-decoration: underline; }

@media (max-width: 560px) {
  .author-card { padding: 18px; gap: 13px; }
  .author-avatar { width: 44px; height: 44px; }
  .author-avatar .logo { width: 24px; height: 24px; }
}

.backlink {
  display: inline-block;
  margin-top: 34px;
  font-size: .93rem;
  color: var(--muted);
}
.backlink:hover { color: var(--accent-2); text-decoration: none; }

/* ---------- 뉴스레터 ---------- */
.newsletter {
  margin-top: 56px;
  padding: 28px 26px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--card); /* color-mix 미지원 브라우저 대비 */
  background:
    radial-gradient(120% 140% at 0% 0%, color-mix(in srgb, var(--accent) 9%, transparent), transparent 60%),
    var(--card);
}

.newsletter h3 {
  margin: 0 0 .4rem;
  font-size: 1.16rem;
  letter-spacing: -.02em;
  font-weight: 700;
}

.newsletter > p {
  margin: 0 0 1.1rem;
  color: var(--muted);
  font-size: .95rem;
}

.subscribe {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.subscribe input {
  flex: 1 1 220px;
  min-width: 0;
  padding: .62rem .85rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-size: .95rem;
}
.subscribe input::placeholder { color: var(--muted); }
.subscribe input:focus {
  outline: none;
  border-color: var(--accent-2);
  box-shadow: 0 0 0 3px var(--ring);
}

/* ---------- 광고 슬롯 ---------- */
.ad-slot {
  margin: 40px 0 8px;
  padding: 22px 16px;
  border: 1px dashed var(--border);
  border-radius: 12px;
  text-align: center;
  color: var(--muted);
  font-size: .85rem;
  background: var(--bg-soft);
}

/* ---------- 푸터 ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--muted);
  font-size: .87rem;
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-block: 24px;
}

.foot-links {
  display: inline-flex;
  gap: 14px;
}
.foot-links a { color: var(--muted); }
.foot-links a:hover { color: var(--accent-2); text-decoration: none; }

/* ---------- 반응형 ---------- */
@media (max-width: 560px) {
  body { font-size: 16px; }
  .wrap { padding-inline: 18px; }
  main.wrap { padding-block: 32px 56px; }
  .nav { gap: 12px; font-size: .88rem; }
  .post-item { padding: 17px 18px; }
  .newsletter { padding: 22px 18px; }
  .cta .btn { flex: 1 1 auto; }
}

/* ---------- 접근성/인쇄 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

@media print {
  .site-header, .site-footer, .newsletter, .ad-slot, .cta, .backlink { display: none; }
  body { background: #fff; color: #000; }
}