/* ===== 기본(라이트) 테마 토큰 =====
   보통 웹사이트 같은 밝고 깔끔한 색. 모든 색은 토큰 경유. */
:root {
  --bg: #f6f8fa;          /* 페이지 배경 */
  --fg: #1f2933;          /* 본문 글자 (on #fff 대비 12.6:1) */
  --dim: #5b6673;         /* 보조 글자 (on #fff 대비 5.5:1) */
  --muted: #5b6673;
  --panel: #ffffff;       /* 카드/패널 */
  --panel-2: #f0f3f6;     /* 옅은 표면 (입력/부버튼 배경) */
  --accent: #2563eb;      /* 강조 (버튼/링크/포인트, on #fff 4.6:1) */
  --accent-strong: #1d4ed8;
  --on-accent: #ffffff;   /* 강조 배경 위 글자 */
  --border: #d0d7de;      /* 경계선 */
  --focus: #1d4ed8;       /* 포커스 */
  --danger: #c9252d;      /* 경고/마감지남 (on #fff 5.0:1) */
  --on-danger: #ffffff;
  --ok: #1a7f37;          /* 완료 초록 (on #fff 4.7:1) */
  --on-ok: #ffffff;
  --info-bg: #e8f0fe;     /* 정보 배경 연파랑 */
  --shadow: 0 1px 2px rgba(27,31,36,0.06), 0 1px 3px rgba(27,31,36,0.10);
  --font-scale: 1;
}

/* ===== 고대비 옵션: 검정·노랑·시안 저시력 테마 (data-contrast="high") =====
   기존 저시력 팔레트를 그대로 보존. 켜면 순검/순백/노랑/시안으로 전환. */
:root[data-contrast="high"] {
  --bg: #000000;
  --fg: #ffffff;
  --dim: #ffffff;
  --muted: #ffffff;
  --panel: #000000;
  --panel-2: #000000;
  --accent: #ffd400;
  --accent-strong: #ffd400;
  --on-accent: #000000;
  --border: #ffffff;
  --focus: #00e5ff;
  --danger: #ff5a5a;
  --on-danger: #000000;
  --ok: #38d67a;
  --on-ok: #000000;
  --info-bg: #14161a;
  --shadow: none;
}

* { box-sizing: border-box; }

html {
  font-size: calc(1.125rem * var(--font-scale));
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "맑은 고딕", "Malgun Gothic", system-ui, sans-serif;
  line-height: 1.6;
}

h1 { font-size: 1.7rem; margin: 0.4em 0 0.5em; }
h2 { font-size: 1.35rem; margin: 1em 0 0.5em; }
h3 { font-size: 1.15rem; }

a { color: var(--accent); }
a:hover { filter: brightness(1.15); }

p.muted, .muted { color: var(--dim); }
.lead { font-size: 1.05rem; }

/* 스크린리더 전용 */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

/* 스킵 링크 */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: var(--on-accent);
  padding: 10px 16px;
  font-weight: bold;
  z-index: 100;
  border-radius: 0 0 8px 0;
}
.skip-link:focus {
  left: 0;
}

/* 포커스 표시: 두꺼운 파란색 */
:focus-visible {
  outline: 4px solid var(--focus);
  outline-offset: 3px;
}

/* ===== 헤더 / 네비 ===== */
.site-header {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.site-header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 20px;
}
.brand { text-decoration: none; color: var(--fg); display: flex; flex-direction: column; }
.brand-org { font-size: 0.8rem; color: var(--dim); }
.brand-title { font-size: 1.15rem; font-weight: bold; color: var(--fg); }

.tool-btn {
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: bold;
  color: var(--fg);
  background: var(--panel-2);
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
  min-height: 44px;
}
.tool-btn:hover { filter: brightness(1.05); }
.tool-btn[aria-pressed="true"] { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }

.site-nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 6px 20px 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0; padding: 0;
}
.site-nav a {
  display: inline-block;
  text-decoration: none;
  color: var(--fg);
  padding: 10px 14px;
  border-radius: 8px;
  border: 2px solid transparent;
  font-weight: bold;
}
.site-nav a:hover { background: var(--panel-2); }
.site-nav a[aria-current="page"] {
  background: var(--panel-2);
  border-color: var(--accent);
  color: var(--accent);
}
.nav-user { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.nav-username { color: var(--dim); }
.nav-link { color: var(--accent); text-decoration: none; padding: 6px; }
.inline-form { display: inline; margin: 0; }

/* ===== 정렬 링크 그룹 ===== */
.sort-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 12px 0;
}
.sort-bar ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0; padding: 0;
}
.sort-label { font-weight: bold; color: var(--dim); }
.sort-bar a {
  display: inline-block;
  text-decoration: none;
  color: var(--fg);
  padding: 8px 12px;
  border: 2px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
}
.sort-bar a:hover { background: var(--panel-2); }
.sort-bar a[aria-current="true"] {
  background: var(--panel-2);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: bold;
}

/* ===== 목록 일괄 처리 ===== */
.bulk-form { margin: 12px 0; }
.bulk-actions {
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  background: var(--panel);
}
.bulk-actions legend { font-weight: bold; padding: 0 6px; }
.data-table input[type="checkbox"] {
  width: 22px;
  height: 22px;
  min-height: 0;
}

/* ===== 본문 ===== */
.site-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 20px 60px;
}

.site-footer {
  border-top: 2px solid var(--border);
  color: var(--dim);
  text-align: center;
  padding: 16px;
  font-size: 0.9rem;
}

/* 하단 접근성 메뉴 (마우스 전용, 스크린리더·탭 순서 제외)
   네이티브 <details>로 JS 없이 펼침/접힘 */
.a11y-menu {
  display: inline-block;
  text-align: left;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 0;
  margin: 0 auto 12px;
  max-width: 320px;
}
.a11y-menu > summary {
  list-style: none;
  font-size: 0.9rem;
  font-weight: bold;
  color: var(--fg);
  padding: 8px 14px;
  cursor: pointer;
  user-select: none;
}
.a11y-menu > summary::-webkit-details-marker { display: none; }
.a11y-menu > summary::before {
  content: "▸ ";
  color: var(--accent);
}
.a11y-menu[open] > summary::before { content: "▾ "; }
.a11y-menu-body {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  padding: 4px 12px 12px;
  border-top: 1px solid var(--border);
}
.a11y-menu-body .tool-btn {
  font-size: 0.85rem;
  min-height: 38px;
  padding: 6px 10px;
}

/* ===== 카드 ===== */
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin: 16px 0;
  box-shadow: var(--shadow);
}
.auth-card { max-width: 460px; margin: 40px auto; }

.card-grid {
  list-style: none;
  margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.card-link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-decoration: none;
  color: var(--fg);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  height: 100%;
  box-shadow: var(--shadow);
}
.card-link:hover { border-color: var(--accent); }
.card-title {
  display: block;
  font-size: 1.35rem;
  font-weight: bold;
  color: var(--accent);
}
.card-hint {
  margin: 0;
  color: var(--dim);
  font-size: 0.95rem;
}
.card-link .card-hint { color: var(--dim); }
/* 홈 제출 카드 배지(미제출 배정 수 · 마감 임박). 색만으로 구분하지 않고 텍스트로 전달. */
.card-badge {
  display: block;
  font-weight: bold;
  color: var(--accent);
}
.card-badge.is-urgent { color: var(--danger); }
/* 관리자 배정별 현황: 지각 표시(텍스트 + 강조, 색 의존 금지) */
.late-flag { color: var(--danger); }

/* ===== 관리자 대시보드 숫자 현황판 ===== */
.stat-grid {
  list-style: none;
  margin: 0 0 20px; padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}
.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
}
.stat-body,
.stat-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  height: 100%;
  padding: 16px 18px;
  border-radius: 12px;
}
.stat-link {
  text-decoration: none;
  color: inherit;
}
.stat-link:hover { background: var(--panel-2); }
.stat-label {
  color: var(--dim);
  font-weight: bold;
  font-size: 0.95rem;
}
.stat-num {
  font-size: 2rem;
  font-weight: bold;
  line-height: 1.2;
  color: var(--fg);
}
.stat-link .stat-num { text-decoration: underline; }
.stat-card.is-alert { border-color: var(--danger); }
.stat-card.is-alert .stat-label,
.stat-card.is-alert .stat-num { color: var(--danger); }

/* ===== 버튼 ===== */
.btn {
  display: inline-block;
  font-family: inherit;
  font-size: 1rem;
  font-weight: bold;
  text-decoration: none;
  text-align: center;
  border-radius: 8px;
  padding: 12px 18px;
  cursor: pointer;
  min-height: 46px;
  border: 2px solid var(--border);
}
.btn-primary { color: var(--on-accent); background: var(--accent); border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); }
.btn-secondary { color: var(--fg); background: var(--panel-2); border-color: var(--border); }
.btn-danger { color: var(--on-danger); background: var(--danger); border-color: var(--danger); }
.btn-large { font-size: 1.15rem; padding: 16px 22px; }
.btn-sm { font-size: 0.9rem; padding: 8px 12px; min-height: 44px; }
.btn-block { display: block; width: 100%; }
.btn:hover { filter: brightness(1.05); }

/* ===== 폼 ===== */
.form-vertical .field { margin-bottom: 16px; }
.field.inline { display: inline-flex; align-items: center; gap: 8px; margin-right: 12px; }
.field label { display: block; font-weight: bold; margin-bottom: 6px; }
.field.inline label { margin-bottom: 0; white-space: nowrap; flex-shrink: 0; }

input[type="text"],
input[type="search"],
input[type="password"],
input[type="tel"],
input[type="date"],
input[type="email"],
input[type="file"],
select {
  font-family: inherit;
  font-size: 1rem;
  color: var(--fg);
  background: var(--panel-2);
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  width: 100%;
  min-height: 46px;
}
select { max-width: 320px; }
input[type="file"] { padding: 8px; }

/* placeholder 대비 확보(검정 배경 대비 4.5:1 이상) */
::placeholder { color: var(--dim); opacity: 1; }

/* ===== 회원가입: 개인정보 동의 ===== */
fieldset.field { border: 2px solid var(--border); border-radius: 8px; padding: 12px 14px; }
fieldset.field legend { font-weight: bold; padding: 0 6px; }
.privacy-notice { margin: 0 0 10px; line-height: 1.6; }
.checkbox-field { display: flex; align-items: center; gap: 8px; }
.checkbox-field input[type="checkbox"] { width: 20px; height: 20px; min-height: 0; flex-shrink: 0; }
.checkbox-field label { margin-bottom: 0; }
.auth-alt { margin-top: 16px; text-align: center; }

.filter-bar, .export-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
  margin: 14px 0;
}

/* ===== 모달 팝업 (네이티브 <dialog>) ===== */
.modal-dialog {
  width: min(440px, calc(100vw - 32px));
  max-width: 440px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  color: var(--fg);
  box-shadow: var(--shadow);
  padding: 24px;
  margin: auto; /* 중앙 정렬 */
}
.modal-dialog h2 { margin: 0 0 12px; }
.modal-message { margin: 0 0 20px; line-height: 1.6; }
.modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.modal-actions .btn { flex: 1 1 auto; }
/* 배경 딤 처리 */
.modal-dialog::backdrop {
  background: rgba(15, 23, 32, 0.55);
}

/* ===== 알림 ===== */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  border: 2px solid var(--border);
  margin: 12px 0;
  font-weight: bold;
}
.alert-error { border-color: var(--danger); color: var(--danger); background: var(--info-bg); }
.alert-info { border-color: var(--accent); color: var(--accent); background: var(--info-bg); }

/* ===== 목록 ===== */
.video-list, .form-list {
  list-style: none;
  margin: 0; padding: 0;
}
.video-item, .form-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  margin-bottom: 12px;
}
.video-link { text-decoration: none; color: var(--fg); flex: 1 1 320px; }
.video-title { display: block; font-size: 1.1rem; font-weight: bold; color: var(--accent); }
.video-desc { display: block; color: var(--dim); font-size: 0.95rem; }
.video-deadline { display: block; color: var(--fg); font-size: 0.95rem; font-weight: bold; }
.video-deadline.is-overdue { color: var(--danger); }
.form-title { font-weight: bold; flex: 1 1 200px; }
.form-file { flex: 1 1 200px; }

.progress-badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  border: 2px solid var(--border);
  font-weight: bold;
  font-size: 0.95rem;
}
.progress-badge.is-done { color: var(--on-ok); background: var(--ok); border-color: var(--ok); }
.progress-badge.is-partial { color: var(--accent); border-color: var(--accent); }
.progress-badge.is-none { color: var(--dim); }

/* 진행률 보조 막대(배지 아래, aria-hidden 시각 보조).
   폭은 CSP(style-src 'self', inline style 차단) 대응으로 10% 단위 클래스 사용. */
.progress-cell {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 6px;
  min-width: 150px;
}
.progress-track {
  display: block;
  height: 8px;
  border-radius: 999px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  overflow: hidden;
}
.progress-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--accent);
}
.progress-fill.is-done { background: var(--ok); }
.pct-0 { width: 0; }
.pct-10 { width: 10%; }
.pct-20 { width: 20%; }
.pct-30 { width: 30%; }
.pct-40 { width: 40%; }
.pct-50 { width: 50%; }
.pct-60 { width: 60%; }
.pct-70 { width: 70%; }
.pct-80 { width: 80%; }
.pct-90 { width: 90%; }
.pct-100 { width: 100%; }

/* ===== 프로그램(시리즈) 목록 ===== */
.program-list {
  list-style: none;
  margin: 0 0 8px; padding: 0;
}
.program-item {
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: 10px;
  margin-bottom: 12px;
}
.program-link {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  text-decoration: none;
  color: var(--fg);
  padding: 14px 18px;
}
.program-name { font-size: 1.1rem; font-weight: bold; color: var(--accent); }
.program-count { color: var(--dim); font-size: 0.95rem; font-weight: bold; }

/* ===== 영상 검색 폼 ===== */
.search-form { margin-bottom: 20px; }

/* ===== 구글폼 배너 ===== */
.google-banner {
  background: var(--panel);
  border: 3px solid var(--accent);
  border-radius: 12px;
  padding: 20px;
  margin: 16px 0 24px;
}
.google-banner h2 { margin-top: 0; color: var(--accent); }

/* ===== 표 ===== */
.table-scroll { overflow-x: auto; margin: 14px 0; }
.data-table {
  border-collapse: collapse;
  width: 100%;
  min-width: 600px;
}
.data-table caption {
  text-align: left;
  color: var(--dim);
  padding: 6px 0 10px;
  font-size: 0.95rem;
}
.data-table th, .data-table td {
  border: 2px solid var(--border);
  padding: 10px 12px;
  text-align: center;
  vertical-align: middle;
  overflow-wrap: anywhere;
}
.data-table thead th, .data-table tfoot th { background: var(--panel-2); }
.data-table th[scope="row"] { text-align: left; background: var(--panel); }
.cell-done { color: var(--on-ok); background: var(--ok); font-weight: bold; }
.cell-partial { color: var(--accent); font-weight: bold; }
.cell-none { color: var(--dim); }

.actions-cell { text-align: left; }
.actions-cell .inline-form { display: block; margin: 4px 0; }
.reset-form { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.reset-form input[type="text"] { width: auto; max-width: 180px; }

/* 회원 표의 작업 메뉴: 좁은 셀 안에서 세로로 자연스럽게 펼쳐지게 */
.actions-cell .folder-actions-menu > summary { margin-top: 0; }
.actions-cell .folder-actions {
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}
.actions-cell .folder-actions .btn { margin: 4px 0; }

/* ===== 브레드크럼 ===== */
.breadcrumb { color: var(--dim); margin: 8px 0 12px; }
.breadcrumb a { color: var(--accent); }

/* 관리자 위치 표시(관리자 메뉴 > 폴더 > 현재 화면) */
.breadcrumb-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0; padding: 0;
}
.breadcrumb-list li { display: flex; align-items: center; }
.breadcrumb-list a { display: inline-block; padding: 6px 2px; font-weight: bold; }
.breadcrumb-sep { color: var(--dim); padding: 0 8px; }
.breadcrumb-list [aria-current="page"] { color: var(--fg); font-weight: bold; }

/* ===== 접히는 폼(회원 추가 등) ===== */
.form-toggle > summary { padding: 4px 0; }
.form-toggle-title {
  display: inline;
  font-size: 1.35rem;
  margin: 0;
}

/* ===== details 단축키 안내 ===== */
details {
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  background: var(--panel);
  margin-bottom: 18px;
}
summary { font-size: 1.1rem; font-weight: bold; cursor: pointer; padding: 4px; }
details dt { font-weight: bold; color: var(--accent); margin-top: 10px; }
details dd { margin: 2px 0 0 0; }

/* ===== 관리자 영상 폴더 트리 ===== */
.folder-list { list-style: none; padding: 0; margin: 14px 0; display: grid; gap: 12px; }
.folder-item {
  border: 2px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  padding: 12px 14px;
}
.folder-link {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--fg);
  padding: 6px 0;
}
.folder-link:hover .folder-name { text-decoration: underline; }
.folder-name { font-size: 1.15rem; font-weight: bold; color: var(--accent); }
.folder-hint { color: var(--dim); font-size: 0.95rem; }
.folder-state { margin: 4px 0 8px; color: var(--fg); font-weight: bold; }
.folder-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.folder-rename { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.folder-rename input[type="text"] { width: auto; max-width: 240px; }
.folder-up { margin: 8px 0 14px; }
.folder-up a { font-weight: bold; }

/* 폴더 행의 작업(이름 바꾸기·차단·삭제)을 접어두는 메뉴 */
.folder-actions-menu > summary,
.sort-menu > summary {
  display: inline-block;
  cursor: pointer;
  padding: 8px 14px;
  margin-top: 6px;
  min-height: 44px;
  line-height: 28px;
  border: 2px solid var(--border);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--fg);
  font-weight: 600;
}
.folder-actions-menu[open] > summary { margin-bottom: 8px; }

/* 목록 정렬 링크를 "정렬" 버튼 하나로 접어두는 메뉴(회원 목록 등) */
.sort-menu {
  border: 0;
  padding: 0;
  background: none;
  margin: 12px 0;
}
.sort-menu > summary { margin-top: 0; }
.sort-menu[open] > summary { margin-bottom: 4px; }
.sort-menu .sort-bar { margin: 0 0 4px; }

/* 정렬: 선택 상자 + 버튼 한 줄 */
.sort-form { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 12px 0; }
.sort-form .field.inline { margin: 0; }

/* 푸터 CONTACT US 블록 */
.footer-contact {
  border-top: 1px solid var(--border);
  padding-top: 16px;
  margin-top: 8px;
}
.footer-contact-title {
  font-size: 0.95rem;
  letter-spacing: 2px;
  color: var(--muted);
  margin: 0 0 6px;
}
.footer-contact-line {
  margin: 2px 0;
  color: var(--fg);
}
.footer-contact-line a { color: var(--accent); }