/* ==========================================================================
   입시코리아 디자인 시스템 (단일 CSS — 예산 120KB 이하)
   모바일 퍼스트. CSS 변수 기반. 웹폰트 없음(시스템 폰트 스택).
   ========================================================================== */

/* ---------- 1. 변수 ---------- */
:root {
  /* 색상 — 데이터 서비스 톤(신뢰감 있는 블루 + 중립 그레이) */
  --c-primary: #1d4ed8;
  --c-primary-hover: #1e40af;
  --c-primary-soft: #eff6ff;
  --c-accent: #0891b2;
  --c-bg: #f8fafc;
  --c-surface: #ffffff;
  --c-text: #0f172a;
  --c-muted: #5b6b7f;
  --c-border: #e2e8f0;
  --c-danger: #dc2626;
  --c-ok: #16a34a;

  /* 타이포 — 시스템 폰트 스택 (웹폰트 금지: LCP 예산) */
  --font-sans: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo",
    "Pretendard Variable", Pretendard, "Malgun Gothic", "맑은 고딕",
    "Segoe UI", Roboto, "Noto Sans KR", sans-serif;

  /* 크기 */
  --maxw: 1080px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(15, 23, 42, .07), 0 4px 14px rgba(15, 23, 42, .05);
  --tap: 44px; /* 최소 터치 타깃 */
}

/* ---------- 2. 리셋/베이스 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  word-break: keep-all; /* 한국어 줄바꿈 */
}
img { max-width: 100%; height: auto; }
a { color: var(--c-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.3; margin: 0 0 .5em; }
h1 { font-size: 1.7rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
table { border-collapse: collapse; width: 100%; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 16px; }

/* 접근성: 스킵 링크 */
.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--c-primary); color: #fff; padding: 10px 16px; z-index: 100;
}
.skip-link:focus { left: 0; }

/* 스크린리더 전용 */
.sr-only {
  position: absolute; width: 1px; height: 1px; margin: -1px;
  padding: 0; overflow: hidden; clip: rect(0 0 0 0); border: 0;
}

/* ---------- 3. 헤더 ---------- */
.site-header {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  position: sticky; top: 0; z-index: 50;
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 56px; gap: 12px;
}
.brand {
  font-size: 1.15rem; font-weight: 800; color: var(--c-text);
  display: inline-flex; align-items: center; gap: 6px;
  min-height: var(--tap);
}
.brand:hover { text-decoration: none; }
.brand .brand-dot { color: var(--c-primary); }

/* 모바일: 햄버거 토글 */
.nav-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: var(--tap); height: var(--tap);
  background: none; border: 0; cursor: pointer; color: var(--c-text);
}
.nav-toggle svg { width: 26px; height: 26px; }

.site-nav {
  display: none;
  position: absolute; top: 100%; left: 0; right: 0;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  box-shadow: var(--shadow);
}
.site-nav.is-open { display: block; }
.site-nav ul { list-style: none; margin: 0; padding: 8px 0; }
.site-nav a {
  display: flex; align-items: center; min-height: var(--tap);
  padding: 0 20px; color: var(--c-text); font-weight: 600;
}
.site-nav a:hover { background: var(--c-primary-soft); text-decoration: none; }
.site-nav .nav-badge {
  margin-left: 6px; font-size: .7rem; font-weight: 700;
  color: var(--c-muted); background: var(--c-bg);
  border: 1px solid var(--c-border); border-radius: 99px; padding: 1px 8px;
}

@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .site-nav {
    display: block; position: static; border: 0; box-shadow: none; background: none;
  }
  .site-nav ul { display: flex; gap: 4px; padding: 0; }
  .site-nav a { padding: 0 14px; border-radius: var(--radius-sm); }
}

/* ---------- 4. 히어로 + 검색 도구 ---------- */
.hero {
  background: linear-gradient(160deg, #1e3a8a 0%, var(--c-primary) 55%, #2563eb 100%);
  color: #fff;
  padding: 40px 0 56px;
}
.hero h1 { font-size: 1.75rem; margin-bottom: .3em; }
.hero .hero-sub { color: #dbeafe; margin-bottom: 24px; font-size: 1rem; }

.search-card {
  background: var(--c-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  color: var(--c-text);
}
.search-card h2 { font-size: 1.05rem; margin-bottom: 14px; }
.search-form { display: grid; gap: 12px; }

.field label {
  display: block; font-size: .85rem; font-weight: 700;
  color: var(--c-muted); margin-bottom: 4px;
}
.field select {
  width: 100%; min-height: var(--tap);
  font-size: 1rem; font-family: inherit;
  padding: 0 12px;
  border: 1.5px solid var(--c-border); border-radius: var(--radius-sm);
  background: var(--c-surface); color: var(--c-text);
}
.field select:focus { outline: 2px solid var(--c-primary); outline-offset: 1px; }
.field select:disabled { background: var(--c-bg); color: var(--c-muted); cursor: not-allowed; }
.field .field-hint { font-size: .78rem; color: var(--c-muted); margin: 4px 0 0; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: var(--tap); padding: 0 20px;
  font-size: 1rem; font-weight: 700; font-family: inherit;
  border-radius: var(--radius-sm); border: 1.5px solid transparent;
  cursor: pointer; text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:hover { background: var(--c-primary-hover); }
.btn-primary:disabled { background: #94a3b8; cursor: not-allowed; }
.btn-outline { background: var(--c-surface); border-color: var(--c-border); color: var(--c-text); }
.btn-outline:hover { border-color: var(--c-primary); color: var(--c-primary); }

@media (min-width: 720px) {
  .hero h1 { font-size: 2.2rem; }
  .search-form { grid-template-columns: 1fr 1fr 1fr auto; align-items: end; }
  .search-form .btn { min-width: 120px; }
}

/* ---------- 5. 섹션/카드 ---------- */
.section { padding: 40px 0; }
.section-head { margin-bottom: 20px; }
.section-head p { color: var(--c-muted); margin: 0; }

.grid { display: grid; gap: 14px; }
@media (min-width: 720px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }

.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px;
}
.card h3 { margin-bottom: .4em; }
.card p { color: var(--c-muted); font-size: .92rem; margin: 0; }
.card .card-icon { font-size: 1.5rem; margin-bottom: 8px; display: block; }

/* 지역 그리드 (17개 시도) */
.region-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
@media (min-width: 600px) { .region-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 900px) { .region-grid { grid-template-columns: repeat(6, 1fr); } }
.region-item {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  min-height: var(--tap);
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-weight: 600; font-size: .95rem; color: var(--c-text);
  text-align: center;
}
a.region-item:hover { border-color: var(--c-primary); color: var(--c-primary); text-decoration: none; }
.region-item.is-pending { color: var(--c-muted); background: var(--c-bg); }

.badge {
  display: inline-block; font-size: .7rem; font-weight: 700;
  padding: 1px 8px; border-radius: 99px;
  background: var(--c-bg); color: var(--c-muted); border: 1px solid var(--c-border);
}
.badge-primary { background: var(--c-primary-soft); color: var(--c-primary); border-color: #bfdbfe; }

/* D-day 스트립 */
.dday-strip {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px;
  background: var(--c-primary-soft);
  border: 1px solid #bfdbfe; border-radius: var(--radius);
  padding: 14px 18px; font-size: .95rem;
}
.dday-strip .dday-num { font-weight: 800; font-size: 1.2rem; color: var(--c-primary); }

/* ---------- 6. 표 (학교 기본정보 등) ---------- */
.info-table { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden; }
.info-table table { font-size: .95rem; }
.info-table th, .info-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--c-border); }
.info-table tr:last-child th, .info-table tr:last-child td { border-bottom: 0; }
.info-table th { width: 30%; background: var(--c-bg); color: var(--c-muted); font-weight: 600; white-space: nowrap; }

.data-table { width: 100%; font-size: .92rem; background: var(--c-surface); }
.data-table th, .data-table td { padding: 10px 12px; border-bottom: 1px solid var(--c-border); text-align: left; }
.data-table thead th { background: var(--c-bg); color: var(--c-muted); font-weight: 600; }
.table-wrap { overflow-x: auto; border: 1px solid var(--c-border); border-radius: var(--radius); }

/* ---------- 7. 알림/안내 ---------- */
.notice {
  background: var(--c-bg); border: 1px dashed var(--c-border);
  border-radius: var(--radius); padding: 16px 18px;
  color: var(--c-muted); font-size: .92rem;
}
.notice strong { color: var(--c-text); }

/* ---------- 8. 본문(매거진/가이드) 타이포 ---------- */
.article-header { margin: 32px 0 24px; }
.article-header .article-meta { color: var(--c-muted); font-size: .88rem; }
.article-body { font-size: 1.02rem; line-height: 1.8; }
.article-body h2 { margin-top: 2em; padding-bottom: .3em; border-bottom: 1px solid var(--c-border); }
.article-body h3 { margin-top: 1.6em; }
.article-body ul, .article-body ol { padding-left: 1.4em; margin: 0 0 1.2em; }
.article-body li { margin-bottom: .35em; }
.article-body blockquote {
  margin: 1.2em 0; padding: 12px 18px;
  border-left: 4px solid var(--c-primary); background: var(--c-primary-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.article-body table { font-size: .92rem; margin-bottom: 1.2em; }
.article-body th, .article-body td { padding: 8px 12px; border: 1px solid var(--c-border); }
.article-body img { border-radius: var(--radius-sm); }

/* 글 목록 */
.post-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.post-card {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--radius); padding: 18px 20px;
}
.post-card h2, .post-card h3 { font-size: 1.1rem; margin-bottom: .3em; }
.post-card a { color: var(--c-text); }
.post-card a:hover { color: var(--c-primary); }
.post-card .post-meta { color: var(--c-muted); font-size: .85rem; }
.post-card .post-excerpt { color: var(--c-muted); font-size: .92rem; margin: .4em 0 0; }

/* 페이지네이션 */
.pagination { display: flex; gap: 6px; justify-content: center; margin: 28px 0; }
.pagination .page-numbers {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: var(--tap); min-height: var(--tap);
  border: 1px solid var(--c-border); border-radius: var(--radius-sm);
  background: var(--c-surface); color: var(--c-text); padding: 0 10px;
}
.pagination .page-numbers.current { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* 브레드크럼 */
.breadcrumb { font-size: .85rem; color: var(--c-muted); margin: 16px 0; }
.breadcrumb a { color: var(--c-muted); }
.breadcrumb .sep { margin: 0 6px; }

/* ---------- 9. 콘텐츠 공통 레이아웃 ---------- */
.page-main { padding-bottom: 48px; }
.page-title-area { padding: 28px 0 8px; }
.page-title-area .page-sub { color: var(--c-muted); margin: 0; }

/* ---------- 10. 푸터 ---------- */
.site-footer {
  background: #0f172a; color: #cbd5e1;
  padding: 32px 0 40px; margin-top: 48px; font-size: .88rem;
}
.site-footer a { color: #e2e8f0; }
.footer-nav ul {
  list-style: none; margin: 0 0 16px; padding: 0;
  display: flex; flex-wrap: wrap; gap: 4px 20px;
}
.footer-nav a { display: inline-flex; align-items: center; min-height: 32px; }
.footer-source {
  border-top: 1px solid #1e293b; padding-top: 16px; color: #94a3b8;
}
.footer-source p { margin: 0 0 6px; }

/* ---------- 11. 404 ---------- */
.error-404 { text-align: center; padding: 64px 0; }
.error-404 .error-code { font-size: 3.2rem; font-weight: 800; color: var(--c-primary); margin: 0; }
.error-404 .btn { margin-top: 12px; }