/* Optimise-Learning-Studio - base */
:root {
  --color-bg:        #faf7f2;
  --color-ink:       #1a1d29;
  --color-border:    #e5e0d6;
  --color-muted:     #6b7080;
  --color-primary:   #1a1d29;
  --color-accent:    #c44d2c;
  --max-width:       92rem;
  --radius:          12px;
  --font-serif:      "Noto Serif JP", Georgia, serif;
  --font-sans:       "Noto Sans JP", system-ui, sans-serif;
}

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&family=Noto+Serif+JP:wght@600;700&display=swap');

* { box-sizing: border-box; }
html, body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden; /* サイト全体の横スクロールを防止 */
}
h1, h2, h3 { font-family: var(--font-serif); letter-spacing: -0.01em; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

.learning-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 6rem;
}

/* ヘッダー */
.learning-header {
  border-bottom: 1px solid var(--color-border);
  background: rgba(250, 247, 242, 0.85);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 30;
}
.learning-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex; justify-content: space-between; align-items: center;
}
.learning-header__logo { font-family: var(--font-serif); font-size: 1.125rem; }
.learning-header__nav { display: flex; gap: 1.5rem; align-items: center; font-size: 0.875rem; }
.learning-header__contact-link {
  font-size: .83rem;
  color: var(--color-primary, #43a047);
  font-weight: 600;
  text-decoration: none;
  padding: .3rem .75rem;
  border: 1.5px solid currentColor;
  border-radius: 20px;
  transition: background .15s, color .15s;
}
.learning-header__contact-link:hover {
  background: var(--color-primary, #43a047);
  color: #fff;
}

/* フッター */
.learning-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* ボタン */
.learning-btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.625rem 1.5rem;
  border-radius: 999px;
  font-size: 0.875rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: opacity 0.15s, background 0.15s, transform 0.05s;
}
.learning-btn:active { transform: translateY(1px); }
.learning-btn--ink    { background: var(--color-ink); color: var(--color-bg); }
.learning-btn--accent { background: var(--color-accent); color: var(--color-bg); }
.learning-btn--ink:hover    { background: var(--color-accent); }
.learning-btn--accent:hover { opacity: 0.9; }
.learning-btn[disabled],
.learning-btn--disabled, .learning-btn--disabled:hover { opacity: 0.3; pointer-events: none; }

/* パンくず・タイトル */
.learning-breadcrumb { font-size: 0.75rem; color: var(--color-muted); margin-bottom: 1rem; }
.learning-title { font-size: 2rem; margin: 0; }

/* タイトルと24hアクティブ人数を横並びに・人数を右端へ */
.learning-title-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin: 0 0 2rem;
}
.learning-title-row .learning-title {
  flex: 1 1 auto;
  min-width: 0;
}

/* 24時間以内に学習した人数 — 目立つデザイン */
.learning-active-count {
  flex: 0 0 auto;
  margin-left: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .15rem;
  background: linear-gradient(135deg, #1565c0 0%, #1976d2 60%, #42a5f5 100%);
  border-radius: 14px;
  padding: .65rem 1.2rem .6rem;
  box-shadow:
    0 4px 14px rgba(21,101,192,.35),
    0 1px 3px rgba(0,0,0,.15);
  min-width: 120px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
/* 背景の光沢ライン */
.learning-active-count::before {
  content: '';
  position: absolute;
  top: 0; left: -40%;
  width: 80%; height: 100%;
  background: linear-gradient(105deg, rgba(255,255,255,.18) 0%, transparent 60%);
  pointer-events: none;
}
.learning-active-count__label {
  font-size: .7rem;
  font-weight: 600;
  color: rgba(255,255,255,.85);
  letter-spacing: .02em;
  line-height: 1.3;
  white-space: nowrap;
}
.learning-active-count__value {
  display: flex;
  align-items: baseline;
  gap: .2rem;
}
.learning-active-count__num {
  font-size: 2rem;
  font-weight: 900;
  color: #fff;
  line-height: 1;
  text-shadow: 0 2px 6px rgba(0,0,0,.2);
}
.learning-active-count__unit {
  font-size: .88rem;
  font-weight: 700;
  color: rgba(255,255,255,.9);
}

@media (max-width: 600px) {
  .learning-title { font-size: 1.35rem; }
  .learning-active-count { padding: .5rem .9rem; min-width: 100px; }
  .learning-active-count__num { font-size: 1.6rem; }
}

.learning-btn--outline {
  background: transparent;
  color: var(--color-text, #333);
  border: 1.5px solid var(--color-border, #ccc);
}
.learning-btn--outline:hover {
  background: var(--color-bg-muted, #f5f5f5);
  border-color: var(--color-primary, #43a047);
  color: var(--color-primary, #43a047);
}

/* ════════════════════════════════════════════════════════
   追加(v2.0.1): 数字フォントを明朝体に（全ページ対象）
   unicode-range で数字・%・小数点・カンマだけを明朝にマッピング。
   日本語など他の文字は従来フォントのまま。
   ════════════════════════════════════════════════════════ */
@font-face {
  font-family: "MinchoNum";
  src:
    /* MS P明朝を最優先（Windows） */
    local("MS PMincho"), local("ＭＳ Ｐ明朝"), local("MS Mincho"), local("ＭＳ 明朝"),
    /* 他環境向けフォールバック */
    local("Hiragino Mincho ProN"), local("HiraMinProN-W3"),
    local("游明朝"), local("Yu Mincho"), local("YuMincho"),
    local("Noto Serif JP"), local("Noto Serif CJK JP"), local("Noto Serif"),
    local("Georgia"), local("Times New Roman");
  unicode-range: U+0030-0039, U+0025, U+002C, U+002E, U+FF10-FF19, U+FF05, U+FF0C, U+FF0E;
  font-display: swap;
}
/* ベース（ゴシック）の数字を明朝に。日本語はそのまま */
body {
  font-family: "MinchoNum", var(--font-sans);
}
/* 本文系テキスト要素の数字を明朝に（各要素は MinchoNum→sans の順で日本語はゴシック維持） */
p, span, div, li, td, th, a, strong, b, em, small, label, button,
dt, dd, figcaption, blockquote, cite {
  font-family: "MinchoNum", var(--font-sans);
}
/* 見出し系（明朝の和文を維持しつつ数字も明朝） */
h1, h2, h3, h4, h5, h6,
.learning-card__title,
.learning-category-row__title,
.learning-title {
  font-family: "MinchoNum", var(--font-serif);
}
/* 明示的に sans-serif 指定だった数字要素にも明朝数字を適用 */
.learning-calendar__month-tag,
.learning-calendar__legend,
.learning-calendar__legend * {
  font-family: "MinchoNum", sans-serif;
}

/* ════════════════════════════════════
   ヘッダーナビ — ハンバーガー + プルダウン（PC・スマホ共通）
   ════════════════════════════════════ */

/* ヘッダー右側ラッパー */
.learning-header__right {
  display: flex;
  align-items: center;
  gap: .5rem;
}

/* PC常時表示のFAQリンク */
.learning-header__faq-link {
  font-size: .85rem;
  font-weight: 700;
  color: var(--color-ink, #1a1a1a);
  text-decoration: none;
  padding: .4rem .8rem;
  border-radius: 8px;
  white-space: nowrap;
  border: 1.5px solid var(--color-border, #e0e0e0);
  transition: background .12s, border-color .12s;
}
.learning-header__faq-link:hover { background: #f0f4ff; border-color: #c5cae9; }
/* スマホではFAQリンクを隠す（ハンバーガー内にあるため） */
@media (max-width: 768px) {
  .learning-header__faq-link { display: none; }
}

/* PC ナビ（使用しないため非表示） */
.learning-header__nav--pc { display: none; }

/* ハンバーガーボタン（常時表示） */
.learning-header__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: none; border: none;
  cursor: pointer; padding: .25rem;
  border-radius: 8px;
  flex-shrink: 0;
  transition: background .12s;
}
.learning-header__hamburger:hover { background: rgba(0,0,0,.06); }
.learning-header__hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--color-ink, #1a1a1a);
  border-radius: 2px;
  transition: transform .22s ease, opacity .22s ease;
  transform-origin: center;
}
.learning-header__hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.learning-header__hamburger.is-open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.learning-header__hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* プルダウンメニュー — 共通（デフォルト非表示） */
.learning-header__mobile-menu {
  display: none;
  flex-direction: column;
}

/* 開いた状態 */
.learning-header__mobile-menu.is-open { display: flex; }

/* スマホ（〜768px）: 全幅スライド */
@media (max-width: 768px) {
  .learning-header__mobile-menu.is-open {
    background: #fff;
    border-top: 1px solid var(--color-border, #e0e0e0);
    box-shadow: 0 8px 24px rgba(0,0,0,.1);
  }
  .learning-header__mobile-link {
    display: flex;
    align-items: center;
    padding: .9rem 1.5rem;
    font-size: .92rem;
    font-weight: 600;
    color: var(--color-ink, #1a1a1a);
    text-decoration: none;
    border-bottom: 1px solid #f0f0f0;
    transition: background .12s;
  }
  .learning-header__mobile-link:hover { background: #f7f8ff; }
  .learning-header__mobile-link--accent { color: var(--color-accent, #43a047); font-weight: 700; }
}

/* PC（769px+）: 右寄せカードドロップダウン */
@media (min-width: 769px) {
  .learning-header {
    position: relative;   /* メニューの absolute 起点 */
  }
  .learning-header__mobile-menu.is-open {
    position: absolute;
    top: calc(100% + 4px);
    right: 1.5rem;
    width: 220px;
    background: #fff;
    border: 1px solid var(--color-border, #e0e0e0);
    border-radius: 12px;
    box-shadow: 0 8px 28px rgba(0,0,0,.14), 0 1px 4px rgba(0,0,0,.08);
    z-index: 200;
    overflow: hidden;
    /* 上部の小さな三角 */
  }
  .learning-header__mobile-menu.is-open::before {
    content: '';
    position: absolute;
    top: -7px; right: 18px;
    width: 14px; height: 14px;
    background: #fff;
    border-left: 1px solid var(--color-border, #e0e0e0);
    border-top: 1px solid var(--color-border, #e0e0e0);
    transform: rotate(45deg);
    border-radius: 2px 0 0 0;
  }
  .learning-header__mobile-link {
    display: flex;
    align-items: center;
    padding: .75rem 1.15rem;
    font-size: .88rem;
    font-weight: 600;
    color: var(--color-ink, #1a1a1a);
    text-decoration: none;
    border-bottom: 1px solid #f5f5f5;
    transition: background .12s;
    gap: .5rem;
  }
  .learning-header__mobile-link:last-child { border-bottom: none; }
  .learning-header__mobile-link:hover { background: #f7f8ff; }
  .learning-header__mobile-link--accent { color: var(--color-accent, #43a047); font-weight: 700; }
}