/* ============================================================
   edusup.co.kr — 학부모를 위한 자녀교육 정보
   디자인 토큰
   ============================================================ */
:root {
  --ink: #24304A;
  --ink-soft: #4B5872;
  --paper: #EEF1EA;
  --paper-alt: #E3E8DC;
  --paper-line: #D9DFCF;
  --card: #FBFAF6;
  --mustard: #D9A441;
  --teal: #3E7C7C;
  --teal-dark: #2C5B5B;
  --rose: #C9756B;
  --border: #CBD2C0;
  --radius: 10px;
  --max-width: 960px;
  --font-display: 'Noto Serif KR', serif;
  --font-body: 'Pretendard Variable', 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-utility: 'Pretendard Variable', 'Pretendard', sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--teal-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--mustard);
  outline-offset: 2px;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 헤더 ---------- */
.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(4px);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.logo span { color: var(--teal-dark); }

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 600;
}
.main-nav a:hover { color: var(--teal-dark); text-decoration: none; }

.nav-toggle { display: none; }

/* ---------- 히어로 (노트 줄무늬) ---------- */
.hero {
  position: relative;
  background:
    repeating-linear-gradient(
      to bottom,
      transparent,
      transparent 38px,
      var(--paper-line) 39px
    ),
    var(--paper);
  padding: 72px 0 56px;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.hero::before {
  content: "";
  position: absolute;
  left: 56px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--rose);
  opacity: 0.45;
}

.hero .wrap { position: relative; }

.eyebrow {
  display: inline-block;
  font-family: var(--font-utility);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--teal-dark);
  background: rgba(62,124,124,0.1);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1.35;
  margin: 0 0 18px;
  color: var(--ink);
  max-width: 20ch;
}

.hero p.lede {
  font-size: 1.08rem;
  color: var(--ink-soft);
  max-width: 52ch;
  margin: 0 0 28px;
}

/* ---------- 카테고리 태그 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  letter-spacing: 0.02em;
}
.tag::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  display: inline-block;
}

.tag--habit { background: rgba(217,164,65,0.15); color: #8A6410; }
.tag--habit::before { background: var(--mustard); }

.tag--study { background: rgba(62,124,124,0.14); color: var(--teal-dark); }
.tag--study::before { background: var(--teal); }

.tag--path { background: rgba(201,117,107,0.14); color: #9A4A41; }
.tag--path::before { background: var(--rose); }

/* ---------- 섹션 공통 ---------- */
section.section { padding: 56px 0; }
section.section + section.section { border-top: 1px solid var(--border); }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 10px;
}

.section-head h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin: 0;
  color: var(--ink);
}

.section-head .section-note {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

/* ---------- 포스트 카드 (책갈피 탭이 시그니처 요소) ---------- */
.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.post-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 20px 20px;
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.post-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(36,48,74,0.08);
}

/* 책갈피 탭: 카테고리 컬러가 카드 상단에 삐죽 튀어나온 형태 */
.post-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 20px;
  width: 28px;
  height: 14px;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 70%, 0 100%);
}
.post-card[data-cat="habit"]::before { background: var(--mustard); }
.post-card[data-cat="study"]::before { background: var(--teal); }
.post-card[data-cat="path"]::before { background: var(--rose); }

.post-card h3 {
  font-family: var(--font-display);
  font-size: 1.12rem;
  line-height: 1.45;
  margin: 14px 0 10px;
}
.post-card h3 a { color: var(--ink); }
.post-card h3 a:hover { color: var(--teal-dark); text-decoration: none; }

.post-card p {
  color: var(--ink-soft);
  font-size: 0.92rem;
  margin: 0 0 14px;
}

.post-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: #7B8577;
}

.read-more {
  font-weight: 700;
  color: var(--teal-dark);
  font-size: 0.85rem;
}

/* ---------- 본문(포스트) 페이지 ---------- */
.post-header { padding: 48px 0 32px; border-bottom: 1px solid var(--border); }
.post-header h1 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.6vw, 2.3rem);
  line-height: 1.4;
  margin: 16px 0 14px;
}
.post-header .post-meta { margin-bottom: 4px; }

.breadcrumb {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-bottom: 18px;
}
.breadcrumb a { color: var(--ink-soft); }
.breadcrumb a:hover { color: var(--teal-dark); }

.post-body {
  padding: 40px 0 20px;
  max-width: 72ch;
}
.post-body h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 36px 0 14px;
  color: var(--ink);
}
.post-body p { margin: 0 0 18px; color: var(--ink); }
.post-body ul, .post-body ol { margin: 0 0 20px; padding-left: 22px; color: var(--ink); }
.post-body li { margin-bottom: 8px; }

.callout {
  background: var(--paper-alt);
  border-left: 3px solid var(--teal);
  padding: 16px 18px;
  border-radius: 6px;
  font-size: 0.94rem;
  color: var(--ink-soft);
  margin: 24px 0;
}

.post-footer-nav {
  border-top: 1px solid var(--border);
  padding: 28px 0 48px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.post-footer-nav a {
  font-weight: 700;
  font-size: 0.92rem;
}

/* ---------- 일반 콘텐츠 페이지 (소개/방침/약관/문의) ---------- */
.page-header { padding: 48px 0 24px; border-bottom: 1px solid var(--border); }
.page-header h1 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.6vw, 2.2rem);
  margin: 0;
}
.page-body { padding: 36px 0 60px; max-width: 72ch; }
.page-body h2 { font-family: var(--font-display); font-size: 1.25rem; margin: 30px 0 12px; }
.page-body p { margin: 0 0 16px; color: var(--ink); }
.page-body li { margin-bottom: 6px; color: var(--ink); }

/* ---------- 문의 폼 ---------- */
.contact-form { display: grid; gap: 16px; max-width: 480px; }
.contact-form label {
  display: block;
  font-weight: 700;
  font-size: 0.88rem;
  margin-bottom: 6px;
  color: var(--ink);
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--card);
  color: var(--ink);
}
.contact-form textarea { resize: vertical; min-height: 130px; }
.contact-form button {
  justify-self: start;
  background: var(--teal-dark);
  color: #fff;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
}
.contact-form button:hover { background: var(--teal); }

.contact-alt {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--ink-soft);
  font-size: 0.92rem;
}

/* ---------- 카테고리 목록 페이지 스타일 (index 하단 전체보기용) ---------- */
.filter-row {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

/* ---------- 푸터 ---------- */
.site-footer {
  background: var(--paper-alt);
  border-top: 1px solid var(--border);
  padding: 40px 0 32px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.footer-grid h4 {
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 8px; }
.footer-grid a { color: var(--ink); font-size: 0.9rem; }
.footer-grid a:hover { color: var(--teal-dark); }

.footer-desc { color: var(--ink-soft); font-size: 0.88rem; max-width: 34ch; }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  font-size: 0.82rem;
  color: #7B8577;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 반응형 ---------- */
@media (max-width: 860px) {
  .post-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .main-nav ul { gap: 16px; }
  .main-nav { display: none; }
  .post-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 48px 0 40px; }
  .hero::before { left: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .post-card { transition: none; }
}