/* 学院祭・行事ページ固有スタイル */

.page-hero {
  text-align: center;
  padding: 3rem 1.5rem 2.5rem;
  border-bottom: 1px solid var(--brass);
}

.page-hero__title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--brass);
  margin: 0 0 0.75rem;
}

.page-hero__desc {
  font-size: 1rem;
  color: color-mix(in oklch, var(--brass) 82%, transparent);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* 季節フィルター */
.event-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.event-filter__btn {
  background: none;
  border: 1px solid color-mix(in oklch, var(--brass) 40%, transparent);
  color: color-mix(in oklch, var(--brass) 80%, transparent);
  font-family: inherit;
  font-size: 0.85rem;
  padding: 0.35rem 0.9rem;
  cursor: pointer;
  transition: border-color 0.18s, color 0.18s, background-color 0.18s;
}

.event-filter__btn:hover {
  border-color: var(--brass);
  color: var(--brass);
}

.event-filter__btn.is-active {
  background-color: var(--brass);
  border-color: var(--brass);
  color: var(--ink);
}

/* イベント一覧 */
.event-calendar {
  max-width: 860px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
}

.event-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid color-mix(in oklch, var(--brass) 25%, transparent);
}

.event-card {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.25rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid color-mix(in oklch, var(--brass) 25%, transparent);
}

.event-card[hidden] {
  display: none;
}

/* 注目イベント */
.event-card--featured {
  background-color: color-mix(in oklch, var(--emerald) 8%, var(--ink));
  background-image: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 20px,
    color-mix(in oklch, var(--brass) 3%, transparent) 20px,
    color-mix(in oklch, var(--brass) 3%, transparent) 21px
  );
  border-left: 3px solid var(--brass);
  margin: 0 -1.5rem;
  padding: 1.5rem;
}

/* 注目ラベル */
.event-card__featured-label {
  grid-column: 1 / -1;
  font-size: 0.7rem;
  font-weight: 700;
  color: color-mix(in oklch, var(--brass) 88%, transparent);
  letter-spacing: 0.08em;
  margin-bottom: 0.35rem;
}

/* 一般公開注記 */
.event-card__public-note {
  font-size: 0.8rem;
  color: color-mix(in oklch, var(--brass) 78%, transparent);
  margin: 0;
  line-height: 1.5;
}

.event-card__public-note strong {
  color: var(--brass);
}

/* 日付 */
.event-card__date {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 0.2rem;
  flex-shrink: 0;
}

.event-card__month {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ember);
  line-height: 1.2;
}

.event-card__day {
  font-size: 0.7rem;
  color: color-mix(in oklch, var(--brass) 77%, transparent);
  text-align: center;
  margin-top: 0.2rem;
  line-height: 1.4;
}

/* イベント本文 */
.event-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.event-card__name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--brass);
  margin: 0;
  line-height: 1.35;
}

.event-card__desc {
  font-size: 0.875rem;
  color: color-mix(in oklch, var(--brass) 80%, transparent);
  margin: 0;
  line-height: 1.65;
}

/* 季節タグ */
.event-card__season {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  width: fit-content;
  letter-spacing: 0.05em;
}

.event-card__season--spring {
  background-color: color-mix(in oklch, var(--emerald) 30%, var(--ink));
  color: var(--brass);
  border: 1px solid color-mix(in oklch, var(--emerald) 60%, transparent);
}

.event-card__season--summer {
  background-color: color-mix(in oklch, var(--ember) 20%, var(--ink));
  color: var(--brass);
  border: 1px solid color-mix(in oklch, var(--ember) 50%, transparent);
}

.event-card__season--autumn {
  background-color: color-mix(in oklch, var(--brass) 20%, var(--ink));
  color: var(--brass);
  border: 1px solid color-mix(in oklch, var(--brass) 50%, transparent);
}

.event-card__season--winter {
  background-color: color-mix(in oklch, var(--ink) 60%, transparent);
  color: var(--brass);
  border: 1px solid color-mix(in oklch, var(--brass) 30%, transparent);
}

/* 詳細展開トリガー */
.event-card__trigger {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: var(--ember);
  font-family: inherit;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.event-card__trigger:hover {
  color: var(--brass);
}

.event-card__trigger-icon {
  font-size: 0.55rem;
  display: inline-block;
  transition: transform 0.2s;
}

.event-card.is-open .event-card__trigger-icon {
  transform: rotate(90deg);
}

/* 詳細パネル */
.event-card__panel {
  grid-column: 1 / -1;
  padding: 1rem 0 0.5rem;
  border-top: 1px solid color-mix(in oklch, var(--brass) 18%, transparent);
}

/* 詳細情報 dl */
.event-detail {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.4rem 1.25rem;
  margin: 0;
  font-size: 0.85rem;
}

.event-detail dt {
  color: var(--ember);
  white-space: nowrap;
}

.event-detail dd {
  color: color-mix(in oklch, var(--brass) 82%, transparent);
  margin: 0;
  line-height: 1.6;
}

@media (width <= 600px) {
  .page-hero {
    padding: 2rem 1rem 1.5rem;
  }

  .page-hero__title {
    font-size: 1.6rem;
  }

  .event-calendar {
    padding: 1.5rem 1rem 2rem;
  }

  .event-card {
    grid-template-columns: 60px 1fr;
    gap: 0.875rem;
  }

  .event-card--featured {
    margin: 0 -1rem;
    padding: 1.25rem 1rem;
  }

  .event-card__month {
    font-size: 0.95rem;
  }

  .event-detail {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .event-detail dt {
    margin-top: 0.5rem;
  }

  .event-detail dt:first-child {
    margin-top: 0;
  }
}