/* ---------- ホーム: 教科ハブ ---------- */

.home-hero {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  min-height: 132px;
  padding: 22px;
  border: 2px solid rgba(255, 255, 255, 0.85);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.home-hero h1 {
  margin-bottom: 4px;
  font-size: clamp(2.4rem, 8vw, 4.4rem);
  line-height: 0.95;
}

.home-greeting {
  margin: 0;
  color: var(--muted);
  font-weight: 800;
}

.gear-button {
  flex: 0 0 auto;
  width: 62px;
  height: 62px;
  justify-self: auto;
  font-size: 1.6rem;
}

.subject-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.subject-card {
  position: relative;
  display: grid;
  justify-items: start;
  gap: 4px;
  min-height: 168px;
  padding: 20px 22px;
  border: 3px solid rgba(255, 255, 255, 0.92);
  border-radius: 16px;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.66)),
    linear-gradient(135deg, var(--card-accent, var(--sun)), #ffffff);
  box-shadow: var(--shadow);
  cursor: pointer;
  text-align: left;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.subject-card::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 10px;
  border-radius: 0 0 13px 13px;
  background: linear-gradient(90deg, var(--card-accent, var(--sun)), var(--card-accent-2, var(--sun)));
}

.subject-card:hover,
.subject-card:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 22px 40px rgba(39, 50, 72, 0.2);
  outline: none;
}

.subject-kokugo { --card-accent: var(--subject-kokugo); --card-accent-2: var(--subject-kokugo-2); }
.subject-sansu { --card-accent: var(--subject-sansu); --card-accent-2: var(--subject-sansu-2); }
.subject-eigo { --card-accent: var(--subject-eigo); --card-accent-2: var(--subject-eigo-2); }
.subject-ongaku { --card-accent: var(--subject-ongaku); --card-accent-2: var(--subject-ongaku-2); }

.subject-icon {
  font-size: clamp(2.4rem, 8vw, 3.4rem);
  line-height: 1;
}

.subject-name {
  font-size: clamp(1.7rem, 6vw, 2.4rem);
  font-weight: 900;
  line-height: 1.1;
}

.subject-tagline {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
}

/* ---------- 教科ページ: モジュールカード ---------- */

.subject-top {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 14px;
}

.subject-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 64px;
  padding: 8px 18px;
  border: 2px solid rgba(255, 255, 255, 0.85);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: var(--shadow);
}

.subject-heading-icon {
  font-size: 1.9rem;
}

.subject-heading h2 {
  margin: 0;
  font-size: clamp(1.4rem, 5vw, 2rem);
}

.module-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.module-card {
  position: relative;
  display: grid;
  gap: 12px;
  align-content: start;
  padding: 16px;
  border: 2px solid rgba(255, 255, 255, 0.9);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.module-card.status-soon {
  opacity: 0.82;
}

.module-head {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.module-icon {
  display: grid;
  place-items: center;
  flex: 0 0 52px;
  height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-size: 1.5rem;
  font-weight: 900;
}

.module-name {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 900;
  line-height: 1.2;
}

.module-badge {
  margin-left: auto;
  padding: 4px 10px;
  border-radius: 999px;
  background: #ffe9a8;
  color: #8a6a00;
  font-size: 0.72rem;
  font-weight: 900;
  white-space: nowrap;
}

.lang-chips {
  display: flex;
  gap: 8px;
}

.lang-chip {
  min-height: 40px;
  padding: 0 14px;
  border: 2px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 900;
  cursor: pointer;
}

.lang-chip.active {
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
}

.module-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.module-start {
  flex: 1 1 auto;
  min-height: 56px;
  min-width: 88px;
  border: 0;
  border-radius: 10px;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  font-weight: 900;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 120ms ease;
}

.module-start:active {
  transform: scale(0.97);
}

.module-start-sub {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.9);
  border: 2px solid var(--line);
}

.module-soon-button {
  color: var(--muted);
  background: #eef0f7;
}

@media (max-width: 760px) {
  .subject-cards {
    grid-template-columns: 1fr;
  }

  .subject-card {
    min-height: 132px;
  }

  .module-cards {
    grid-template-columns: 1fr;
  }
}