/* ===========================
   lesson.css — 授業内容ページ
   =========================== */

/* FEATURES GRID */
.features-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.feature-item {
  text-align: center;
  padding: 36px 24px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.feature-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.feature-item__icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}
.feature-item__icon i {
  font-size: 1.6rem;
  color: #fff;
}
.feature-item h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 10px;
}
.feature-item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* LESSON STYLE CARDS （クラス分けなし・来塾スタイル別） */
.style-intro {
  max-width: 760px;
  margin: 0 auto 40px;
  text-align: center;
}
.style-intro p {
  font-size: 0.97rem;
  color: var(--color-text);
  line-height: 1.9;
}
.style-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 8px;
}
.style-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: var(--transition);
  border-top: 4px solid var(--color-primary-light);
}
.style-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.style-card--featured {
  border-top-color: var(--color-accent);
  position: relative;
}
.style-card__icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.style-card--featured .style-card__icon {
  background: linear-gradient(135deg, var(--color-accent), #b8943e);
}
.style-card__icon i { font-size: 1.3rem; color: #fff; }
.style-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}
.style-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.75;
}
.style-card__points {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.style-card__points li {
  font-size: 0.85rem;
  color: var(--color-text);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.style-card__points i { color: var(--color-primary-light); margin-top: 3px; flex-shrink: 0; }
.style-card--featured .style-card__points i { color: var(--color-accent); }

/* SCHEDULE — カレンダー＋テキスト横並び */
.schedule-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 32px;
  align-items: stretch;
  margin-top: 40px;
}
.schedule-calendar {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: #fff;
}
.schedule-calendar iframe { display: block; width: 100%; height: 100%; min-height: 500px; }
.schedule-info {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.schedule-info__block {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  transition: var(--transition);
  flex: 1;
}
.schedule-info__block:hover { box-shadow: var(--shadow-hover); }
.schedule-info__block--holiday {
  border-left: 4px solid var(--color-primary-light);
}
.schedule-info__icon {
  width: 38px;
  height: 38px;
  min-width: 38px;
  background: var(--color-bg-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.schedule-info__icon i { font-size: 0.95rem; color: var(--color-primary); }
.schedule-info__block h4 {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 6px;
}
.schedule-info__block p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.75;
}
.schedule-info__block strong { color: var(--color-primary-dark); }
.holiday-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
}
.holiday-list li {
  font-size: 0.86rem;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  gap: 8px;
}
.holiday-list i {
  font-size: 0.4rem;
  color: var(--color-primary-light);
  flex-shrink: 0;
}

/* CERTIFICATION */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
}
.cert-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  box-shadow: var(--shadow);
  border-top: 4px solid var(--color-primary-light);
  transition: var(--transition);
}
.cert-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-top-color: var(--color-accent);
}
.cert-card__header {
  margin-bottom: 16px;
}
.cert-card__header i {
  font-size: 2.4rem;
  color: var(--color-primary);
  margin-bottom: 14px;
  display: block;
}
.cert-card__header h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.5;
}
.cert-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.75;
}

/* RESPONSIVE */
@media (max-width: 1000px) {
  .schedule-layout { grid-template-columns: 1fr; }
  .schedule-info { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
}
@media (max-width: 1100px) {
  .features-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .style-cards { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .features-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: 1fr; }
  .schedule-info { grid-template-columns: 1fr; }
}

/* REWARD CARD */
.feature-item--reward {
  border-top: 3px solid var(--color-accent);
}
.feature-item__icon--accent {
  background: linear-gradient(135deg, var(--color-accent), #b8943e) !important;
}