* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --teal: #6CB8A2;
  --sky: #9ECAE4;
  --mint: #B0D6C8;
  --gold: #C4A055;
  --dark: #2C3E50;
  --text: #3A4A5A;
  --light-bg: #F7FBF9;
  --card: #FFFFFF;
  --border: #D5E8E0;
}

body {
  font-family: "Hiragino Sans", "Yu Gothic", "Meiryo", "Helvetica Neue", sans-serif;
  background: linear-gradient(165deg, var(--mint) 0%, var(--sky) 45%, #E8F4F0 100%);
  min-height: 100vh;
  color: var(--text);
  line-height: 1.5;
}

.app {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px 12px 48px;
  width: 100%;
}

header {
  text-align: center;
  margin-bottom: 18px;
}

header h1 {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--dark);
  letter-spacing: 0.08em;
}

.subtitle {
  font-size: 0.82rem;
  color: #6A7A8A;
  margin-top: 6px;
  letter-spacing: 0.03em;
}

/* プレビューエリア */
.preview-area {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 8px;
  background: var(--card);
  border-radius: 16px;
  box-shadow: 0 6px 20px rgba(44, 62, 80, 0.08);
  padding: 14px 8px;
  margin-bottom: 16px;
  border: 1px solid var(--border);
  flex-wrap: nowrap;
}

.canvas-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex: 1;
  min-width: 0;
}

.canvas-wrap span {
  font-size: 0.68rem;
  color: #8A9AAA;
  letter-spacing: 0.04em;
}

#plushCanvas,
#backCanvas {
  width: 100%;
  max-width: 160px;
  height: auto;
  border-radius: 10px;
  background: #FAFCFB;
  display: block;
}

/* パーツメニュー */
.parts-menu {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}

.part-btn {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 13px 4px;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--dark);
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
  letter-spacing: 0.02em;
}

.part-btn:active,
.part-btn.active {
  background: var(--teal);
  color: #fff;
  border-color: var(--teal);
  box-shadow: 0 2px 8px rgba(108, 184, 162, 0.3);
}

/* カラーパネル */
.color-panel {
  background: var(--card);
  border-radius: 14px;
  box-shadow: 0 6px 24px rgba(44, 62, 80, 0.1);
  padding: 14px;
  margin-bottom: 16px;
  border: 1px solid var(--border);
  animation: fadeIn 0.25s ease;
}

.color-panel.hidden {
  display: none;
}

.color-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--dark);
}

.close-btn {
  background: #EEF5F2;
  border: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  font-size: 1rem;
  color: #6A7A8A;
  cursor: pointer;
  line-height: 1;
  transition: background 0.15s;
}

.close-btn:active {
  background: var(--mint);
}

.color-options {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  max-height: 220px;
  overflow-y: auto;
}

.color-swatch {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  position: relative;
  background-color: #f0f4f2;
  background-size: 55%;
  background-repeat: no-repeat;
  background-position: center;
}

.color-swatch:active {
  transform: scale(0.92);
}

.color-swatch.selected {
  box-shadow: 0 0 0 2px var(--teal), 0 2px 8px rgba(0,0,0,0.12);
}

.color-swatch.selected::after {
  content: "✓";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 600;
  font-size: 1.1rem;
  text-shadow: 0 1px 3px rgba(0,0,0,0.4);
}

/* 注意書き */
.notice {
  background: #F0F7F4;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 16px;
  font-size: 0.78rem;
  color: #5A6A7A;
  line-height: 1.55;
  letter-spacing: 0.02em;
}

.notice p {
  margin: 0;
}

.notice p + p {
  margin-top: 4px;
}

/* アクション */
.action-area {
  text-align: center;
}

.order-btn {
  background: linear-gradient(135deg, var(--teal), #5AA892);
  color: #fff;
  border: none;
  border-radius: 50px;
  padding: 14px 42px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(108, 184, 162, 0.35);
  transition: transform 0.15s, box-shadow 0.15s;
  letter-spacing: 0.04em;
}

.order-btn:active {
  transform: scale(0.97);
  box-shadow: 0 2px 8px rgba(108, 184, 162, 0.3);
}

/* モーダル */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(44, 62, 80, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
  backdrop-filter: blur(3px);
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: var(--card);
  border-radius: 16px;
  padding: 28px 22px;
  width: 100%;
  max-width: 360px;
  max-height: 90vh;
  overflow-y: auto;
  animation: fadeIn 0.28s ease;
  border: 1px solid var(--border);
}

.modal-content h2 {
  text-align: center;
  color: var(--dark);
  margin-bottom: 14px;
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.order-list {
  list-style: none;
  margin-bottom: 22px;
}

.order-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 11px 0;
  border-bottom: 1px solid #EEF2F0;
  font-size: 0.9rem;
}

.order-list li span:last-child {
  font-weight: 500;
  color: var(--teal);
}

.modal-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.save-btn {
  background: var(--gold);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 13px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s;
  letter-spacing: 0.02em;
}

.save-btn:active {
  opacity: 0.85;
}

.close-modal-btn {
  background: #EEF2F0;
  color: #6A7A8A;
  border: none;
  border-radius: 10px;
  padding: 13px;
  font-size: 0.9rem;
  cursor: pointer;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* レスポンシブ */
@media (max-width: 400px) {
  .app {
    padding: 12px 10px 40px;
  }
  header h1 {
    font-size: 1.25rem;
  }
  .parts-menu {
    grid-template-columns: repeat(2, 1fr);
  }
  .part-btn {
    padding: 11px 2px;
    font-size: 0.8rem;
  }
  .notice {
    font-size: 0.72rem;
    padding: 10px 12px;
  }
  #plushCanvas,
  #backCanvas {
    max-width: 140px;
  }
}

@media (min-width: 500px) {
  .app {
    padding-top: 32px;
  }
  header h1 {
    font-size: 1.55rem;
  }
  #plushCanvas,
  #backCanvas {
    max-width: 180px;
  }
}