/* ============================================================
   FIRST VIEW - KENCHIKU 100NINTEN
   ============================================================ */
.first-view-kenchiku100ninten {
  position: relative;
  width: 100%;
  /* height はIDセレクタ側 (#canvas-container) で管理 */
  display: block;
  overflow: hidden;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
  background-color: var(--color-accent);
}

.first-view-kenchiku100ninten * {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}

#canvas-container {
  width: 100vw;
  height: 50svh;
  display: block;
}

/* ============================================================
   About
   ============================================================ */
.kenchiku100ninten-section {
  padding: 5rem var(--section-pad-x);
  max-width: var(--section-max-w);
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.kenchiku100ninten-content p {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
  margin: 0;
  text-align: justify;
}

.entry-content p + p {
  margin-top: 0.35rem;
}

.entry-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
}

.entry-action {
  display: flex;
  width: 100%;
  min-width: 0;
  min-height: 4.5rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--color-accent);
  color: #fff;
  background: var(--color-accent);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-normal);
  text-align: left;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

a.entry-action:hover {
  border-color: #d9478f;
  background: #d9478f;
  color: #fff;
}

.entry-action--disabled {
  border-color: #f3b2d2;
  color: #754159;
  background: #f8cce1;
  cursor: not-allowed;
}

.entry-action small {
  flex: 0 0 auto;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

/* ============================================================
   Info List
   ============================================================ */
.kenchiku100nintenlist {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* ============================================================
   RESPONSIVE ── モバイル (≤ 480px) - Content
   ============================================================ */
@media (max-width: 480px) {
  /* Content */
  .kenchiku100ninten-section {
    padding: 5rem var(--section-pad-x-mobile) 0;

  }

  .kenchiku100ninten-content p {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-medium);
  }

  .entry-actions {
    grid-template-columns: 1fr;
  }

}