/* ===== みんなの まなび ひろば 共通スタイル ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #fdf6e3;
  --card: #ffffff;
  --primary: #ff8c42;
  --primary-dark: #e67329;
  --accent: #4ecdc4;
  --accent-dark: #3aada5;
  --text: #4a3f35;
  --kokugo: #ff6b81;
  --sansu: #54a0ff;
  --rika: #2ecc71;
  --shakai: #e67e22;
  --eigo: #9b59b6;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

body {
  font-family: "Hiragino Maru Gothic ProN", "BIZ UDGothic", "Yu Gothic UI",
    "Meiryo", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ---- ヘッダー ---- */
.site-header {
  background: linear-gradient(135deg, #ffb347, #ff8c42);
  color: #fff;
  text-align: center;
  padding: 20px 12px;
  box-shadow: var(--shadow);
}

.site-header h1 {
  font-size: 1.9rem;
  letter-spacing: 0.1em;
  text-shadow: 2px 2px 0 rgba(0, 0, 0, 0.15);
}

.site-header p {
  margin-top: 6px;
  font-size: 1rem;
}

.breadcrumb {
  max-width: 1000px;
  margin: 12px auto 0;
  padding: 0 16px;
  font-size: 0.95rem;
}

.breadcrumb a {
  color: var(--primary-dark);
  text-decoration: none;
  font-weight: bold;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* ---- カード一覧 ---- */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px 16px 60px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.card {
  background: var(--card);
  border-radius: 20px;
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--text);
  transition: transform 0.15s, box-shadow 0.15s;
  border: 4px solid transparent;
  display: block;
}

.card:not(.disabled):hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18);
}

.card .emoji {
  font-size: 3.2rem;
  display: block;
  margin-bottom: 10px;
}

.card h2 {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.card p {
  font-size: 0.95rem;
  line-height: 1.6;
}

.card.disabled {
  opacity: 0.45;
  cursor: default;
  filter: grayscale(0.6);
}

.card .badge {
  display: inline-block;
  margin-top: 10px;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  padding: 4px 14px;
  font-size: 0.85rem;
  font-weight: bold;
}

.card.disabled .badge {
  background: #aaa;
}

.card.kokugo { border-color: var(--kokugo); }
.card.sansu { border-color: var(--sansu); }

/* ---- 先生向けメモ ---- */
.teacher-note {
  margin-top: 36px;
  background: #fff8dc;
  border: 2px dashed var(--primary);
  border-radius: 14px;
  padding: 4px 18px 14px;
  font-size: 0.92rem;
  line-height: 1.8;
}

.teacher-note summary {
  cursor: pointer;
  font-weight: bold;
  padding: 10px 0;
  color: var(--primary-dark);
}

.teacher-note ul {
  padding-left: 1.4em;
}