body {
  font-family: "Hiragino Sans", "Meiryo", sans-serif;
  background: #f5f5f7;
  margin: 0;
  padding: 40px 16px;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  background: white;
  padding: 32px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

h1 {
  font-size: 22px;
  margin-bottom: 4px;
}

h2 {
  font-size: 16px;
  margin-top: 28px;
}

.upload-form {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

input[type="text"] {
  flex: 1;
  padding: 8px;
  border: 1px solid #ccc;
  border-radius: 6px;
}

form {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.insight-form {
  margin-top: 12px;
}

button {
  padding: 10px 16px;
  background: #2d6cdf;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
}

button:disabled {
  background: #9fb6e0;
  cursor: not-allowed;
}

.loading {
  flex-basis: 100%;
  margin: 4px 0 0;
  color: #2d6cdf;
  font-size: 13px;
}

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

.data-table {
  border-collapse: collapse;
  font-size: 13px;
  width: 100%;
}

.data-table th, .data-table td {
  border: 1px solid #ddd;
  padding: 6px 10px;
  text-align: left;
}

.chart-image {
  max-width: 100%;
  margin-top: 16px;
  border-radius: 8px;
}

.insight-text {
  white-space: pre-wrap;
  background: #f0f0f3;
  padding: 12px;
  border-radius: 8px;
}

.flash {
  list-style: none;
  padding: 0;
}

.flash-error {
  color: #c0392b;
}

.flash-success {
  color: #27ae60;
}