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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f0f4f8;
  color: #333;
  min-height: 100vh;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px;
}

h1 {
  text-align: center;
  font-size: 1.4rem;
  color: #1565c0;
  margin-bottom: 16px;
  padding: 12px 0;
}

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

h2 {
  font-size: 1rem;
  color: #1565c0;
  margin-bottom: 12px;
  border-left: 4px solid #2196F3;
  padding-left: 8px;
}

/* フォーム */
.form-group {
  margin-bottom: 10px;
}

label {
  display: block;
  font-size: 0.82rem;
  color: #666;
  margin-bottom: 4px;
}

input, select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 0.95rem;
  background: #fafafa;
  transition: border-color 0.2s;
}

input:focus, select:focus {
  outline: none;
  border-color: #2196F3;
  background: #fff;
}

.btn-primary {
  display: block;
  width: 100%;
  padding: 10px;
  background: #2196F3;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 0.95rem;
  cursor: pointer;
  margin-top: 6px;
  transition: background 0.2s;
}

.btn-primary:hover {
  background: #1565c0;
}

/* グラフ */
.graph-wrap {
  overflow-x: auto;
}

#graphCanvas {
  display: block;
  width: 100%;
  height: 200px;
}

.legend {
  font-size: 0.78rem;
  color: #666;
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.legend-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 3px;
  vertical-align: middle;
}

.dot-normal  { background: #2196F3; }
.dot-warning { background: #FF9800; }
.dot-high    { background: #f44336; }

/* 記録一覧 */
.record-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.empty-msg {
  color: #999;
  font-size: 0.88rem;
  text-align: center;
  padding: 12px 0;
}

.record-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
  padding: 10px;
  border-radius: 8px;
  border-left: 5px solid #2196F3;
  background: #f7faff;
}

.record-item.warning {
  border-left-color: #FF9800;
  background: #fff8f0;
}

.record-item.high {
  border-left-color: #f44336;
  background: #fff5f5;
}

.record-info {
  flex: 1;
  font-size: 0.88rem;
  line-height: 1.5;
}

.record-glucose {
  font-size: 1.15rem;
  font-weight: bold;
  color: #333;
}

.record-glucose.warning { color: #E65100; }
.record-glucose.high    { color: #c62828; }

.record-timing {
  display: inline-block;
  font-size: 0.72rem;
  padding: 1px 6px;
  border-radius: 4px;
  background: #e3f2fd;
  color: #1565c0;
  margin-left: 4px;
}

.delete-btn {
  background: none;
  border: none;
  color: #bbb;
  cursor: pointer;
  font-size: 1.1rem;
  padding: 2px 4px;
  line-height: 1;
  transition: color 0.2s;
  flex-shrink: 0;
}

.delete-btn:hover {
  color: #f44336;
}

@media (max-width: 480px) {
  h1 { font-size: 1.15rem; }
  h2 { font-size: 0.9rem; }
  .record-glucose { font-size: 1rem; }
}