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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f0f4f0;
  color: #333;
  min-height: 100vh;
  padding: 16px;
}

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

h1 {
  text-align: center;
  font-size: 1.4rem;
  color: #2e7d32;
  margin-bottom: 16px;
}

h2 {
  font-size: 1rem;
  color: #2e7d32;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 2px solid #a5d6a7;
}

.card {
  background: #fff;
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 14px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}

.form-group {
  margin-bottom: 10px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: #555;
  margin-bottom: 4px;
}

.form-group input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 0.95rem;
  transition: border-color 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: #4caf50;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.usage-input-row {
  display: flex;
  gap: 8px;
}

.usage-input-row input {
  flex: 1;
}

.btn-primary {
  background: #4caf50;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 10px 20px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}

.btn-primary:hover {
  background: #388e3c;
}

#addPlanBtn {
  width: 100%;
  margin-top: 4px;
}

.empty-msg {
  color: #aaa;
  font-size: 0.9rem;
  text-align: center;
  padding: 8px 0;
}

/* プランリスト */
.plan-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #f9fbe7;
  border: 1px solid #dcedc8;
  border-radius: 6px;
  padding: 10px 12px;
  margin-bottom: 8px;
}

.plan-info {
  font-size: 0.9rem;
}

.plan-info .plan-name {
  font-weight: bold;
  color: #2e7d32;
  margin-bottom: 2px;
}

.plan-info .plan-detail {
  color: #666;
  font-size: 0.82rem;
}

.btn-delete {
  background: none;
  border: 1px solid #ef9a9a;
  color: #e53935;
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-delete:hover {
  background: #ffebee;
}

/* 結果テーブル */
.result-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.result-table th {
  background: #e8f5e9;
  color: #2e7d32;
  padding: 8px 10px;
  text-align: left;
}

.result-table td {
  padding: 10px;
  border-bottom: 1px solid #f0f0f0;
}

.result-table tr.best {
  background: #fff9c4;
}

.result-table tr.best td:first-child::before {
  content: "★ ";
  color: #f9a825;
}

.best-badge {
  display: inline-block;
  background: #f9a825;
  color: #fff;
  font-size: 0.75rem;
  border-radius: 3px;
  padding: 2px 6px;
  margin-left: 6px;
}

.amount {
  font-weight: bold;
  color: #2e7d32;
}

@media (max-width: 400px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}