.cart-wrap {
  min-height: 100vh;
  padding: clamp(6rem, 12vw, 10rem) clamp(1.5rem, 6vw, 4rem) 4rem;
  max-width: 860px;
  margin: 0 auto;
}

.cart-header {
  text-align: center;
  margin-bottom: 4rem;
}

.cart-header h1 {
  font-family: 'Cinzel', serif;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 400;
  background: linear-gradient(135deg, var(--gold), var(--gold-bright));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.3em;
  margin-bottom: 0.5rem;
}

.cart-header p {
  font-size: 0.8rem;
  color: rgba(232, 217, 176, 0.5);
  letter-spacing: 0.15em;
}

/* ステップインジケーター */
.steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 4rem;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid rgba(201, 168, 76, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Cinzel', serif;
  font-size: 0.7rem;
  color: rgba(232, 217, 176, 0.4);
}

.step.active .step-num {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(201, 168, 76, 0.1);
}

.step.done .step-num {
  border-color: var(--gold);
  background: var(--gold);
  color: var(--black);
}

.step-label {
  font-family: 'Cinzel', serif;
  font-size: 0.55rem;
  letter-spacing: 0.2em;
  color: rgba(232, 217, 176, 0.4);
}

.step.active .step-label {
  color: var(--gold);
}

.step-line {
  width: clamp(3rem, 8vw, 6rem);
  height: 1px;
  background: rgba(201, 168, 76, 0.2);
  margin-bottom: 1.2rem;
}

/* 商品サマリー */
.product-summary {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem;
  border: 1px solid rgba(201, 168, 76, 0.2);
  background: rgba(201, 168, 76, 0.03);
  margin-bottom: 2.5rem;
  position: relative;
}

.product-summary img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
  flex-shrink: 0;
}

.summary-info {
  flex: 1;
  min-width: 0;
  padding-right: 7rem;
}

.summary-name {
  font-family: 'Noto Serif JP', serif;
  font-size: 0.75rem;
  color: rgba(232, 217, 176, 0.6);
  letter-spacing: 0.15em;
  margin-bottom: 0.3rem;
  line-height: 1.55;
}

.summary-title {
  font-family: 'Cinzel', serif;
  font-size: 1.1rem;
  background: linear-gradient(135deg, var(--gold), var(--gold-bright));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.2em;
}

.summary-limit {
  font-size: 0.72rem;
  color: rgba(232, 217, 176, 0.45);
  letter-spacing: 0.1em;
  margin-top: 0.3rem;
}

/* 数量セレクター（PCは右寄せ、スマホはタイトルと限定の間） */
.qty-wrap {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
}

.qty-btn {
  width: 32px;
  height: 32px;
  border: 1px solid rgba(201, 168, 76, 0.5);
  background: transparent;
  color: var(--gold);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  flex-shrink: 0;
}

.qty-btn:hover {
  background: rgba(201, 168, 76, 0.15);
}

.qty-num {
  font-family: 'Cinzel', serif;
  font-size: 1.1rem;
  color: var(--cream);
  min-width: 2rem;
  text-align: center;
}

/* フォーム */
.form-section {
  margin-bottom: 2.5rem;
}

.form-sub-label {
  font-family: 'Noto Serif JP', serif;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: rgba(232, 217, 176, 0.5);
  margin-bottom: 0.8rem;
  padding-left: 0.5rem;
  border-left: 2px solid rgba(201, 168, 76, 0.4);
}

.form-section-title {
  font-family: 'Cinzel', serif;
  font-size: 0.65rem;
  letter-spacing: 0.4em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid rgba(201, 168, 76, 0.2);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 600px) {
  .form-grid {
    grid-template-columns: 1fr;
  }

  .product-summary {
    flex-direction: column;
    align-items: center;
    gap: 0.9rem;
    padding: 1.25rem 1rem;
    text-align: center;
  }

  .product-summary img {
    width: 72px;
    height: 72px;
  }

  .summary-info {
    padding-right: 0;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .summary-title {
    font-size: 1rem;
    letter-spacing: 0.16em;
    white-space: nowrap;
  }

  .summary-limit {
    font-size: 0.65rem;
    letter-spacing: 0.06em;
    margin-top: 0.45rem;
  }

  .qty-wrap {
    position: static;
    transform: none;
    margin: 0.55rem 0 0;
    gap: 0.75rem;
    justify-content: center;
  }

  .qty-btn {
    width: 30px;
    height: 30px;
  }

  .qty-num {
    min-width: 1.5rem;
    font-size: 1rem;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-group label {
  font-family: 'Cinzel', serif;
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  color: rgba(232, 217, 176, 0.6);
}

.form-group label span {
  color: var(--gold);
  margin-left: 0.3rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(201, 168, 76, 0.25);
  color: var(--cream);
  font-family: 'Noto Serif JP', serif;
  font-size: 0.9rem;
  padding: 0.8rem 1rem;
  outline: none;
  transition: border-color 0.2s;
  width: 100%;
  border-radius: 0;
  -webkit-appearance: none;
  appearance: none;
  color-scheme: dark;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--gold);
  outline: none;
  box-shadow: none;
}

/* ブラウザのオートフィル色を上書き */
.form-group input:-webkit-autofill,
.form-group input:-webkit-autofill:hover,
.form-group input:-webkit-autofill:focus,
.form-group input:-webkit-autofill:active {
  -webkit-box-shadow: 0 0 0 1000px #0f0d08 inset !important;
  -webkit-text-fill-color: var(--cream) !important;
  caret-color: var(--cream);
  border: 1px solid rgba(201, 168, 76, 0.25);
  transition: background-color 99999s ease-out;
}

.form-group input:-webkit-autofill:focus {
  border-color: var(--gold);
}

.form-group input:autofill {
  box-shadow: 0 0 0 1000px #0f0d08 inset !important;
  -webkit-text-fill-color: var(--cream) !important;
  caret-color: var(--cream);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(232, 217, 176, 0.2);
}

.form-group select {
  cursor: pointer;
  padding-right: 2.5rem;
  accent-color: var(--gold);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23c9a84c' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-color: rgba(255, 255, 255, 0.03);
}

.form-group select option {
  background: #1a1400;
  color: var(--cream);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

/* 注文確認ボックス */
.order-summary {
  border: 1px solid rgba(201, 168, 76, 0.25);
  padding: 1.5rem;
  margin-bottom: 2rem;
  background: rgba(201, 168, 76, 0.02);
}

.order-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0;
  font-size: 0.85rem;
  border-bottom: 1px solid rgba(201, 168, 76, 0.1);
}

.order-row:last-child {
  border-bottom: none;
}

.order-row .key {
  color: rgba(232, 217, 176, 0.55);
  letter-spacing: 0.1em;
}

.order-row-total .key,
.order-row-total .val {
  font-weight: 600;
  color: var(--gold-bright);
}

.order-row .val {
  color: var(--cream);
  letter-spacing: 0.05em;
  text-align: right;
}

.order-summary-note {
  margin: 0.75rem 0 0.25rem;
  font-size: 0.72rem;
  color: rgba(232, 217, 176, 0.45);
  line-height: 1.5;
}

/* 注意事項 */
.caution {
  font-size: 0.72rem;
  color: rgba(232, 217, 176, 0.35);
  line-height: 2;
  letter-spacing: 0.05em;
  margin-bottom: 2rem;
  padding: 1rem;
  border-left: 1px solid rgba(201, 168, 76, 0.2);
}

/* 送信ボタン */
.submit-btn {
  width: 100%;
  padding: 1.2rem;
  background: linear-gradient(135deg, var(--gold) 0%, var(--gold-bright) 100%);
  color: var(--black);
  font-family: 'Cinzel', serif;
  font-size: 0.85rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(201, 168, 76, 0.4);
}

.submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* 完了画面 */
#complete-screen {
  display: none;
  text-align: center;
  padding: 4rem 2rem;
}

.complete-icon {
  width: 60px;
  height: 60px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 2rem;
  font-size: 1.5rem;
}

.complete-title {
  font-family: 'Cinzel', serif;
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  background: linear-gradient(135deg, var(--gold), var(--gold-bright));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.3em;
  margin-bottom: 1rem;
}

.complete-text {
  font-size: 0.9rem;
  line-height: 2.2;
  color: rgba(232, 217, 176, 0.65);
  max-width: 480px;
  margin: 0 auto 2rem;
  letter-spacing: 0.05em;
}

.complete-order-id {
  font-family: 'Cinzel', serif;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: rgba(232, 217, 176, 0.4);
}

.back-link {
  display: inline-block;
  margin-top: 2.5rem;
  font-family: 'Cinzel', serif;
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  color: rgba(201, 168, 76, 0.6);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 168, 76, 0.3);
  padding-bottom: 2px;
  transition: color 0.3s;
}

.back-link:hover {
  color: var(--gold);
}

/* エラー */
.field-error {
  font-size: 0.65rem;
  color: #ff7755;
  letter-spacing: 0.05em;
  margin-top: 0.2rem;
}

.form-group input.invalid,
.form-group select.invalid {
  border-color: #ff7755;
}