/* METiA 資料室 共通スタイル
   値は METiA の各シミュレーターと同じ配色・書体・部品の見た目にそろえたもの。
   画面幅の区切り：スマホ = 767px以下、タブレット・PC = 768px以上 */

:root {
  --main-color: #0e7490;
  --main-color-light: #0891b2;
  --accent-color: #059669;
  --card-bg: #ffffff;
  --card-border: #e2e8f0;
  --secondary-text: #475569;
  --heading-text: #0f172a;
  --border-color: #e2e8f0;
  --danger: #dc2626;
  --muted: #94a3b8;
  --font: 'Inter', 'Noto Sans JP', 'Segoe UI', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--secondary-text);
  background-color: #eef2f7;
  background-image:
    radial-gradient(circle at 10% -10%, rgba(8, 145, 178, 0.07), transparent 42%),
    radial-gradient(circle at 95% 0%, rgba(5, 150, 105, 0.06), transparent 40%),
    linear-gradient(180deg, #f8fafc 0%, #eef2f7 60%, #eef2f7 100%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-wrap: anywhere;      /* 長い英数字も折り返す */
  word-break: normal;
}
@media (max-width: 767px) {
  body { background-attachment: scroll; }
}

h1, h2, h3 { font-family: var(--font); letter-spacing: -0.01em; }
img { max-width: 100%; height: auto; display: block; }
button, input, select { font: inherit; }
a { color: var(--main-color); }

/* スクロールバー（見た目のみ） */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #eef2f7; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* ---------- 見出しの帯 ---------- */
.bg-main-gradient {
  background-image: linear-gradient(to right, #0e7490, #0891b2 55%, #06b6d4 100%);
  box-shadow: 0 2px 8px rgba(14, 116, 144, 0.18);
  color: #ffffff;
}
.site-header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.brand { display: flex; align-items: center; min-width: 0; }
.brand img { height: 40px; width: auto; border-radius: 6px; box-shadow: 0 1px 4px rgba(15, 23, 42, 0.25); }
.header-exit {
  flex-shrink: 0;
  color: #ffffff;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.875rem;
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 0.5rem;
  padding: 6px 12px;
  transition: background-color 0.2s;
  white-space: nowrap;
}
.header-exit:hover, .header-exit:focus-visible { background-color: rgba(255, 255, 255, 0.16); }
@media (min-width: 768px) {
  .site-header-inner { padding: 12px 32px; }
  .brand img { height: 44px; }
}

/* ---------- 全体の幅と余白 ---------- */
.container { max-width: 1280px; margin: 0 auto; padding: 24px 16px 40px; }
@media (min-width: 768px) {
  .container { padding: 32px 32px 48px; }
}

/* h1：中央・太字・メイン色 */
h1 {
  text-align: center;
  font-weight: 700;
  color: var(--main-color);
  font-size: 1.875rem;
  line-height: 2.25rem;
  margin: 0 0 2rem;
}
@media (min-width: 768px) {
  h1 { font-size: 2.25rem; line-height: 2.5rem; }
}
/* h2：中央・太字・下にメイン色の線 */
h2 {
  text-align: center;
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 2rem;
  color: var(--secondary-text);
  border-bottom: 2px solid var(--main-color);
  padding-bottom: 12px;
  margin: 0 0 24px;
}

.intro { text-align: center; margin: -1rem 0 1.5rem; }

/* ---------- カード ---------- */
.bg-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 10px 24px -6px rgba(15, 23, 42, 0.10);
  color: var(--secondary-text);
  border-radius: 0.75rem;
}

/* ---------- 絞り込み欄 ---------- */
.filter-card { margin-bottom: 24px; }
.filter-toggle {
  display: none;
  width: 100%;
  background: transparent;
  border: 0;
  padding: 14px 16px;
  text-align: left;
  font-weight: 700;
  font-size: 1rem;
  color: var(--secondary-text);
  cursor: pointer;
  align-items: center;
  gap: 8px;
  border-radius: 0.75rem;
}
.filter-toggle:hover { background-color: #f9fafb; }
.filter-toggle-label { flex-shrink: 0; }
.filter-status { flex: 1; min-width: 0; font-weight: 500; font-size: 0.8125rem; color: var(--main-color); }
.filter-body { padding: 24px; }
.filter-row + .filter-row { margin-top: 16px; }
.filter-label { display: block; font-size: 0.8125rem; font-weight: 700; color: var(--heading-text); margin-bottom: 6px; }
.filter-hint { font-weight: 400; color: var(--secondary-text); }

/* 分類ボタン */
.cat-buttons { display: flex; flex-wrap: wrap; gap: 8px; }
.cat-btn {
  border: 1px solid #0e7490;
  background-color: #ffffff;
  color: #0e7490;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-weight: 700;
  font-size: 0.9375rem;
  line-height: 1.5;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  transition: all 0.2s;
  max-width: 100%;
  text-align: left;
}
@media (hover: hover) {
  .cat-btn[aria-pressed="false"]:hover { background-color: #ecfeff; }  /* スマホのタップ後に色が残らないよう、マウスのある端末だけ */
}
.cat-btn[aria-pressed="true"] { background-color: #0e7490; color: #ffffff; }
.cat-count { font-weight: 500; opacity: 0.85; }

.filter-row-2 { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 768px) {
  .filter-row-2 { grid-template-columns: minmax(0, 1fr) 220px; }
}

/* 検索欄・並べ替え（検索は左寄せ） */
.search-input, .sort-select {
  width: 100%;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  background-color: #ffffff;
  color: var(--heading-text);
  padding: 0.625rem 0.875rem;
  font-size: 1rem;           /* 16px未満だとiPhoneで拡大されるため */
  line-height: 1.5;
}
.search-input { text-align: left; }
.search-input::placeholder { color: #94a3b8; }
.search-input:focus, .sort-select:focus {
  border-color: var(--main-color);
  outline: none;
  box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.18);
}

.filter-foot {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
}
.result-count { margin: 0; font-weight: 700; color: var(--heading-text); }
.result-count strong { color: var(--main-color); font-size: 1.125rem; }

/* 控えめなボタン */
.btn-sub {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background-color: #ffffff;
  color: var(--main-color);
  border: 1px solid var(--card-border);
  border-radius: 0.5rem;
  padding: 0.5rem 1rem;
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
}
.btn-sub:hover, .btn-sub:focus-visible { background-color: #ecfeff; border-color: #a5f3fc; }

/* 主ボタン */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
  border: 0;
  border-radius: 0.5rem;
  padding: 0.625rem 1.25rem;
  background-image: linear-gradient(to right, var(--accent-color) 0%, #0891b2 51%, var(--main-color) 100%);
  background-size: 200% auto;
  transition: 0.5s;
  box-shadow: 0 4px 14px rgba(14, 116, 144, 0.28);
  cursor: pointer;
}
.btn-primary:hover, .btn-primary:focus-visible {
  background-position: right center;
  box-shadow: 0 6px 20px rgba(14, 116, 144, 0.38);
}

/* 開閉矢印 */
.accordion-arrow { display: inline-block; transition: transform 0.3s ease; color: var(--main-color); }
.filter-toggle[aria-expanded="true"] .accordion-arrow,
.summary-btn[aria-expanded="true"] .accordion-arrow { transform: rotate(180deg); }

/* スマホ：絞り込み欄を開閉式に */
@media (max-width: 767px) {
  .filter-toggle {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas: "label arrow" "status status";
    row-gap: 2px;
  }
  .filter-toggle-label { grid-area: label; }
  .filter-toggle .accordion-arrow { grid-area: arrow; }
  .filter-status { grid-area: status; }
  .filter-status:empty { display: none; }
  .filter-body { display: none; padding: 4px 16px 16px; }
  .filter-card.is-open .filter-body { display: block; }
}

/* ---------- 資料カード一覧 ---------- */
.doc-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
@media (min-width: 640px) {
  .doc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
}
@media (min-width: 1024px) {
  .doc-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.doc-card { display: flex; flex-direction: column; overflow: hidden; min-width: 0; }
.doc-thumb {
  position: relative;
  aspect-ratio: 13 / 9;
  background: #f1f5f9;
  border-bottom: 1px solid var(--card-border);
  overflow: hidden;
}
.doc-thumb::before {            /* カード上部のメイン色の線 */
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background-image: linear-gradient(to right, #0e7490, #0891b2 55%, #06b6d4 100%);
  z-index: 1;
}
.doc-thumb img { width: 100%; height: 100%; object-fit: contain; }
/* サムネイルなし：分類色の帯＋PDFアイコン */
.doc-thumb.no-thumb {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: #ffffff;
  background-color: var(--cat-color, #0e7490);
  background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0) 60%);
}
.doc-thumb.no-thumb svg { width: 56px; height: 56px; }
.doc-thumb.no-thumb span { font-weight: 800; letter-spacing: 0.1em; font-size: 0.875rem; }

.doc-body { padding: 16px; display: flex; flex-direction: column; flex: 1; min-width: 0; }
@media (min-width: 768px) { .doc-body { padding: 24px; } }

.doc-badges { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.4;
  padding: 2px 8px;
  border-radius: 9999px;
  max-width: 100%;
}
.badge-cat { color: var(--cat-color, #0e7490); background-color: #ecfeff; border: 1px solid currentColor; }
.badge-new { color: #ffffff; background-color: var(--danger); }

.doc-title {
  margin: 0 0 6px;
  font-size: 1.125rem;
  line-height: 1.5;
  font-weight: 700;
  color: var(--heading-text);
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  overflow: hidden;
}
.doc-dates { margin: 0 0 10px; font-size: 0.8125rem; color: var(--secondary-text); }
/* 管理番号・追加日・更新日を横に並べ、狭い画面では項目ごとに次の行へ（項目の途中では折り返さない） */
.doc-dates { display: flex; flex-wrap: wrap; column-gap: 0.75em; }
.doc-dates span { white-space: nowrap; }
.doc-number { font-variant-numeric: tabular-nums; letter-spacing: 0.02em; }

.doc-summary-wrap { margin-bottom: 12px; }
.doc-summary {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  white-space: pre-line;
}
.summary-btn {
  background: transparent;
  border: 0;
  padding: 4px 0;
  color: var(--main-color);
  font-weight: 700;
  font-size: 0.875rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.summary-btn:hover { text-decoration: underline; }
.summary-btn .sp-label { display: none; }

/* PC：概要は3行まで＋「続きを読む」（はみ出しがあるときだけ表示） */
@media (min-width: 768px) {
  .doc-summary-wrap:not(.is-open) .doc-summary {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    overflow: hidden;
  }
  .summary-btn:not([data-overflow]) { display: none; }
  .doc-summary-wrap.is-open .summary-btn { display: inline-flex; }  /* 開いている間は必ず「閉じる」を出す（スマホ幅で開いてから広げた場合も） */
}
/* スマホ：概要は初期は閉じる「概要を見る ▼」 */
@media (max-width: 767px) {
  .summary-btn { order: -1; }
  .summary-btn .pc-label { display: none; }
  .summary-btn .sp-label { display: inline-flex; align-items: center; gap: 4px; }
  .doc-summary-wrap { display: flex; flex-direction: column; align-items: flex-start; }
  .doc-summary-wrap:not(.is-open) .doc-summary { display: none; }
  .doc-summary-wrap.is-open .doc-summary { margin-top: 4px; }
}

.doc-meta { margin: auto 0 12px; font-size: 0.8125rem; color: #64748b; }
.doc-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.doc-actions .btn-primary { flex: 1 1 auto; }
@media (max-width: 767px) {
  .doc-actions { flex-direction: column; }
  .doc-actions .btn-primary, .doc-actions .btn-sub { width: 100%; }
}

/* ---------- 該当なし ---------- */
.empty { text-align: center; padding: 40px 16px; }
.empty p { margin: 0 0 16px; font-weight: 700; color: var(--heading-text); }

/* ---------- ページ下 ---------- */
.site-footer { max-width: 1280px; margin: 0 auto; padding: 0 16px 40px; text-align: center; }
.footer-notice { font-size: 0.8125rem; color: #64748b; margin: 16px 0 0; }
@media (min-width: 768px) { .site-footer { padding: 0 32px 48px; } }

/* ---------- 案内画面（通行証無効・閲覧終了など） ---------- */
.notice-card { max-width: 640px; margin: 0 auto; padding: 32px 24px; text-align: center; }
.notice-card p { margin: 0; font-size: 1.0625rem; color: var(--heading-text); font-weight: 500; }
.notice-card .notice-sub { margin-top: 16px; font-size: 0.875rem; color: var(--secondary-text); font-weight: 400; }

/* ---------- 印刷・キーボード操作 ---------- */
:focus-visible { outline: 3px solid rgba(8, 145, 178, 0.45); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}