:root {
  --primary-color: #007bff;
  --primary-hover: #0056b3;
  --background-color: #f8f9fa;
  --card-background: #ffffff;
  --text-color: #212529;
  --subtle-text-color: #6c757d;
  --border-color: #dee2e6;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --border-radius: 8px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  margin: 0;
  padding: 2rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.app-header {
  text-align: center;
}

h1 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

h2 {
  font-size: 1.5rem;
  margin-top: 0;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.app-header p {
  font-size: 1.125rem;
  color: var(--subtle-text-color);
  margin-top: 0;
}

.card {
  background-color: var(--card-background);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 2rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: flex-end;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-grow: 1;
}

label {
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--subtle-text-color);
}

input[type="text"],
select {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}

input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

button#analyzeBtn {
  padding: 0.75rem 2rem;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  transition: background-color 0.2s;
  height: fit-content;
}

button#analyzeBtn:hover {
  background-color: var(--primary-hover);
}

.hidden {
  display: none;
}

#loading {
  text-align: center;
  padding: 2rem;
  color: var(--subtle-text-color);
}

.spinner {
  border: 4px solid rgba(0, 0, 0, 0.1);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border-left-color: var(--primary-color);
  animation: spin 1s ease infinite;
  margin: 0 auto 1rem;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.insights-container {
  background-color: #eef7ff;
  border-left: 5px solid var(--primary-color);
  margin-bottom: 1.5rem;
}

#insights {
  white-space: pre-wrap;
  line-height: 1.7;
}

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

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background-color: var(--background-color);
  font-weight: 600;
  color: var(--subtle-text-color);
  text-transform: uppercase;
  font-size: 0.75rem;
}

tbody tr:last-child td {
  border-bottom: none;
}