/* =========================================================
   바로GO — 기본 스타일
   모바일 우선, PC 드롭다운 / 모바일 햄버거 메뉴
   ========================================================= */

:root {
  --color-bg: #ffffff;
  --color-surface: #f7f7f5;
  --color-text: #1f2328;
  --color-muted: #5f6672;
  --color-border: #e5e7eb;
  --color-primary: #2f6f5e;
  --color-primary-soft: #eaf3ef;
  --color-accent: #c98a4b;

  --shadow-md: 0 6px 24px rgba(15, 23, 42, 0.08);

  --radius-sm: 6px;
  --radius-md: 10px;

  --header-height: 60px;
  --container-max: 1200px;

  --transition-fast: 160ms ease;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo",
    "Pretendard", "Noto Sans KR", "Segoe UI", Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 8px 12px;
  z-index: 1000;
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: 0;
}

/* ---------- 헤더 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 16px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-text);
}
.logo-mark {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
}
.logo-text {
  white-space: nowrap;
}

/* ---------- 햄버거 버튼 (모바일) ---------- */
.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}
.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background: var(--color-text);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 기본(모바일) 네비게이션 ---------- */
.primary-nav {
  position: fixed;
  inset: var(--header-height) 0 0 0;
  background: var(--color-bg);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--transition-fast);
  visibility: hidden;
}
.primary-nav.is-open {
  transform: translateX(0);
  visibility: visible;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 8px 0 80px;
}

.nav-item {
  border-bottom: 1px solid var(--color-border);
}

.nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  font-weight: 600;
  font-size: 1rem;
  width: 100%;
}

.caret {
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--color-muted);
  transition: transform var(--transition-fast);
  margin-left: 8px;
}
.has-submenu.is-open > .nav-link .caret,
.submenu-group.is-open > .submenu-link .caret {
  transform: rotate(180deg);
}

.submenu {
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--color-surface);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-fast);
}
.has-submenu.is-open > .submenu,
.submenu-group.is-open > .submenu {
  max-height: 1500px;
}

.submenu-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px 12px 36px;
  font-size: 0.95rem;
  color: var(--color-muted);
}
.submenu-deep .submenu-link {
  padding-left: 52px;
  font-size: 0.92rem;
}

/* 활성 상태 */
.nav-link.is-active,
.submenu-link.is-active {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

/* ---------- PC: 드롭다운 ---------- */
@media (min-width: 960px) {
  .nav-toggle {
    display: none;
  }

  .primary-nav {
    position: static;
    inset: auto;
    transform: none;
    visibility: visible;
    background: transparent;
    overflow: visible;
  }

  .nav-list {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0;
  }

  .nav-item {
    position: relative;
    border-bottom: none;
  }

  .nav-link {
    padding: 0 14px;
    height: var(--header-height);
    font-size: 0.95rem;
    white-space: nowrap;
  }
  .nav-link:hover,
  .nav-link:focus-visible {
    color: var(--color-primary);
  }

  .caret {
    border-top-color: currentColor;
    opacity: 0.6;
  }

  .submenu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: 8px;
    max-height: none;
    overflow: visible;
    opacity: 0;
    transform: translateY(6px);
    pointer-events: none;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
  }

  .nav-item.has-submenu:hover > .submenu,
  .nav-item.has-submenu:focus-within > .submenu,
  .nav-item.has-submenu.is-open > .submenu {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .submenu-link {
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--color-text);
  }
  .submenu-link:hover,
  .submenu-link:focus-visible {
    background: var(--color-primary-soft);
    color: var(--color-primary);
  }

  /* 프로그램 안내처럼 3단계가 있는 경우 — 우측 펼침 */
  .submenu-group {
    position: relative;
  }
  .submenu-deep {
    position: absolute;
    top: -8px;
    left: 100%;
    margin-left: 4px;
    min-width: 180px;
  }
  .submenu-group:hover > .submenu-deep,
  .submenu-group:focus-within > .submenu-deep,
  .submenu-group.is-open > .submenu-deep {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .submenu-deep .submenu-link {
    padding-left: 12px;
  }

  /* 지역 메뉴 — 다중 컬럼 그리드 */
  .submenu-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(80px, 1fr));
    gap: 2px 4px;
    min-width: 420px;
  }
  .submenu-grid .submenu-link {
    text-align: center;
    padding: 10px 8px;
  }

  /* 우측에 가까운 항목은 좌측으로 열기 */
  .nav-item:nth-last-child(-n+2) .submenu {
    left: auto;
    right: 0;
  }
}