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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: #f5f7fa;
  color: #333;
  line-height: 1.5;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 16px;
}

header {
  text-align: center;
  padding: 24px 0 16px;
}

header h1 {
  font-size: 1.6rem;
  color: #1565c0;
}

header .subtitle {
  font-size: 0.85rem;
  color: #888;
  margin-top: 4px;
}

section {
  background: #fff;
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

h2 {
  font-size: 1rem;
  color: #1565c0;
  margin-bottom: 14px;
  padding-bottom: 6px;
  border-bottom: 2px solid #e3f2fd;
}

/* フォーム */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-group label {
  font-size: 0.8rem;
  color: #666;
  font-weight: 600;
}

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

.form-group input:focus {
  outline: none;
  border-color: #2196f3;
}

.preview {
  margin: 12px 0;
  padding: 10px 14px;
  background: #e3f2fd;
  border-radius: 8px;
  display: flex;
  gap: 24px;
  font-size: 0.9rem;
  color: #1565c0;
}

.preview strong {
  font-size: 1.05rem;
}

.btn-add {
  width: 100%;
  padding: 12px;
  background: #2196f3;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 12px;
  transition: background 0.2s;
}

.btn-add:hover {
  background: #1976d2;
}

/* サマリー */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.summary-card {
  text-align: center;
  padding: 14px 8px;
  background: #f5f7fa;
  border-radius: 8px;
}

.summary-label {
  font-size: 0.75rem;
  color: #888;
  margin-bottom: 4px;
}

.summary-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: #1565c0;
}

/* グラフ */
.chart-wrapper {
  position: relative;
  width: 100%;
  height: 180px;
}

canvas {
  width: 100% !important;
  height: 100% !important;
}

/* テーブル */
.empty-msg {
  text-align: center;
  color: #aaa;
  padding: 24px;
  font-size: 0.9rem;
}

.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

thead tr {
  background: #e3f2fd;
}

th {
  padding: 10px 8px;
  text-align: left;
  font-weight: 600;
  color: #1565c0;
  white-space: nowrap;
}

td {
  padding: 10px 8px;
  border-bottom: 1px solid #f0f0f0;
  white-space: nowrap;
}

tbody tr:hover {
  background: #fafafa;
}

.rate-cell {
  font-weight: 700;
}

.rate-high { color: #2e7d32; }
.rate-mid  { color: #f57c00; }
.rate-low  { color: #c62828; }

.btn-delete {
  padding: 4px 10px;
  background: #fff;
  border: 1px solid #ef9a9a;
  color: #c62828;
  border-radius: 4px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 0.15s;
}

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

@media (max-width: 500px) {
  .form-grid {
    grid-template-columns: 1fr;
  }

  .summary-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }

  .summary-value {
    font-size: 1rem;
  }

  header h1 {
    font-size: 1.3rem;
  }
}