* {
  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: 680px;
  margin: 0 auto;
  padding: 16px;
}

header {
  text-align: center;
  padding: 20px 0 12px;
}

header h1 {
  font-size: 1.6rem;
  color: #2c3e50;
}

section {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

section h2 {
  font-size: 1rem;
  font-weight: 700;
  color: #2c3e50;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid #e8ecf0;
}

.form-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.form-row label {
  width: 100px;
  font-size: 0.85rem;
  color: #555;
  flex-shrink: 0;
}

.form-row input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-row input:focus {
  border-color: #3498db;
}

#btn-add {
  width: 100%;
  padding: 12px;
  background: #3498db;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: 6px;
  transition: background 0.2s;
}

#btn-add:hover {
  background: #2980b9;
}

.graph-container {
  width: 100%;
  overflow-x: auto;
}

#temp-chart {
  width: 100%;
  height: 200px;
  display: block;
}

.legend {
  font-size: 0.8rem;
  color: #666;
  margin-top: 10px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.legend-normal {
  color: #3498db;
}

.legend-fever {
  color: #e74c3c;
}

.legend-line {
  color: #e74c3c;
}

#record-count {
  font-size: 0.8rem;
  color: #888;
  font-weight: normal;
}

.record-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 8px;
  background: #f8f9fa;
  border-left: 4px solid #3498db;
}

.record-item.fever {
  border-left-color: #e74c3c;
  background: #fff5f5;
}

.record-temp {
  font-size: 1.3rem;
  font-weight: 700;
  min-width: 60px;
  color: #2c3e50;
}

.record-item.fever .record-temp {
  color: #e74c3c;
}

.record-datetime {
  flex: 1;
  font-size: 0.85rem;
  color: #555;
}

.record-memo {
  font-size: 0.8rem;
  color: #888;
}

.fever-badge {
  font-size: 0.7rem;
  background: #e74c3c;
  color: #fff;
  padding: 2px 6px;
  border-radius: 10px;
  white-space: nowrap;
}

.btn-delete {
  background: none;
  border: none;
  color: #bbb;
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}

.btn-delete:hover {
  color: #e74c3c;
  background: #fff0f0;
}

.empty-msg {
  text-align: center;
  color: #aaa;
  font-size: 0.9rem;
  padding: 20px 0;
}

@media (max-width: 480px) {
  .form-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .form-row label {
    width: auto;
  }

  .form-row input {
    width: 100%;
  }

  .record-item {
    flex-wrap: wrap;
  }
}