*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f4f6f4;
  color: #333;
  min-height: 100vh;
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 16px;
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1a6e3c;
  text-align: center;
  padding: 16px 0 12px;
}

h2 {
  font-size: 1rem;
  font-weight: 600;
  color: #444;
  margin-bottom: 12px;
}

/* フォームセクション */
.form-section {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

.form-group {
  margin-bottom: 12px;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  color: #555;
  margin-bottom: 4px;
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d0d8d0;
  border-radius: 8px;
  font-size: 0.95rem;
  color: #333;
  background: #fafafa;
  transition: border-color 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: #27ae60;
  background: #fff;
}

.btn-primary {
  display: block;
  width: 100%;
  padding: 12px;
  background: #27ae60;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: 4px;
}

.btn-primary:hover {
  background: #219a52;
}

/* 一覧セクション */
.list-section {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

.list-header {
  margin-bottom: 12px;
}

.filter-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 6px;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: #555;
  cursor: pointer;
}

.toggle-label input[type="checkbox"] {
  accent-color: #27ae60;
  width: 16px;
  height: 16px;
}

.count-display {
  font-size: 0.82rem;
  color: #888;
}

.coupon-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.empty-msg {
  text-align: center;
  color: #aaa;
  font-size: 0.9rem;
  padding: 24px 0;
}

/* クーポンカード */
.coupon-card {
  border: 1px solid #e0e8e0;
  border-radius: 10px;
  padding: 12px 14px;
  position: relative;
  background: #fff;
  transition: opacity 0.2s;
}

.coupon-card.urgent {
  border-color: #e67e22;
  background: #fff8f0;
}

.coupon-card.expired {
  border-color: #ddd;
  background: #f8f8f8;
  opacity: 0.65;
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}

.card-name {
  font-size: 0.97rem;
  font-weight: 600;
  color: #222;
  flex: 1;
  line-height: 1.4;
}

.coupon-card.expired .card-name {
  color: #888;
}

.delete-btn {
  background: none;
  border: none;
  color: #bbb;
  font-size: 1.2rem;
  cursor: pointer;
  line-height: 1;
  padding: 0 0 0 4px;
  flex-shrink: 0;
  transition: color 0.2s;
}

.delete-btn:hover {
  color: #e74c3c;
}

.card-discount {
  display: inline-block;
  background: #e8f5ef;
  color: #1a6e3c;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 20px;
  margin-top: 6px;
}

.coupon-card.expired .card-discount {
  background: #eee;
  color: #999;
}

.coupon-card.urgent .card-discount {
  background: #fdebd0;
  color: #c0392b;
}

.card-expiry {
  font-size: 0.82rem;
  margin-top: 6px;
  color: #666;
}

.coupon-card.urgent .card-expiry {
  color: #e67e22;
  font-weight: 600;
}

.coupon-card.expired .card-expiry {
  color: #aaa;
}

.expiry-badge {
  display: inline-block;
  font-size: 0.75rem;
  padding: 1px 6px;
  border-radius: 4px;
  margin-left: 6px;
  font-weight: 600;
}

.badge-expired {
  background: #eee;
  color: #999;
}

.badge-urgent {
  background: #fdebd0;
  color: #c0392b;
}

.card-memo {
  font-size: 0.8rem;
  color: #888;
  margin-top: 4px;
}

@media (min-width: 480px) {
  .container {
    padding: 20px 24px;
  }
  h1 {
    font-size: 1.7rem;
  }
}