/* ==============================
   シミュレーター レイアウト
   ============================== */

.simulator {
  padding: 160px 0 120px;
  min-height: 100vh;
  box-sizing: border-box;
}

.simulator__inner {
  width: 100%;
  max-width: calc(1440px + 24px * 2);
  margin-inline: auto;
  padding: 0 24px;
  box-sizing: border-box;
}

.simulator__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 40px;
  align-items: flex-start;
}

/* ==============================
   SVG プレビューエリア
   ============================== */

.simulator__preview {
  background-color: rgba(0, 0, 0, 0.03);
  border: 1px solid rgba(0, 0, 0, 0.08);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.simulator__preview svg {
  width: 100%;
  height: auto;
  max-width: 560px;
  display: block;
}

/* ==============================
   生地選択パネル
   ============================== */

.simulator__panel {
  position: sticky;
  top: 32px;
}

.simulator__panel-title {
  margin: 0 0 16px;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.08em;
  border-bottom: 1px solid #111;
  padding-bottom: 8px;
}

.simulator__fabric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.simulator__fabric-btn {
  padding: 0;
  border: 2px solid transparent;
  background: none;
  cursor: pointer;
  border-radius: 0;
  transition: border-color 0.15s ease, transform 0.1s ease;
  aspect-ratio: 1;
  overflow: hidden;
}

.simulator__fabric-btn img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.simulator__fabric-btn:hover {
  border-color: #999;
  transform: translateY(-1px);
}

.simulator__fabric-btn.is-selected {
  border-color: #000;
}

.simulator__fabric-btn.is-selected img {
  opacity: 0.85;
}

/* ==============================
   レスポンシブ: タブレット (768px - 1023px)
   ============================== */

@media (min-width: 768px) and (max-width: 1023px) {
  .simulator {
    padding: 40px 0 80px;
  }

  .simulator__inner {
    padding: 0 28px;
  }

  /* タブレット: 2カラム維持しつつパネル幅を縮小 */
  .simulator__layout {
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 28px;
  }

  .simulator__panel {
    top: 20px;
  }

  /* 生地グリッドを3列に */
  .simulator__fabric-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ==============================
   レスポンシブ: モバイル (〜767px)
   ============================== */

@media (max-width: 767px) {
  .simulator {
    padding: 24px 0 60px;
  }

  .simulator__inner {
    padding: 0 20px;
  }

  /* モバイル: 1カラム縦積みに変更 */
  .simulator__layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* SVGプレビューを上、パネルを下に */
  .simulator__preview {
    order: 1;
  }

  .simulator__panel {
    order: 2;
    position: static; /* sticky 解除 */
  }

  /* 生地グリッドを4列（パネルが全幅になるため維持） */
  .simulator__fabric-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
  }
}