:root {
  --bg-color: #f0f2f5;
  --header-bg: #4A90E2;
  --header-text: white;
  --text-color: #333;
  --section-bg: white;
  --heading-color: #4A90E2;
  --border-color: #ddd;
  --input-border: #ccc;
  --button-hover: #357ABD;
  --shadow-color: rgba(0, 0, 0, 0.1);
}

[data-theme='dark'] {
  --bg-color: #1a1a1a;
  --header-bg: #2c3e50;
  --header-text: #ecf0f1;
  --text-color: #f0f2f5;
  --section-bg: #2c2c2c;
  --heading-color: #4A90E2;
  --border-color: #444;
  --input-border: #555;
  --button-hover: #357ABD;
  --shadow-color: rgba(0, 0, 0, 0.5);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0;
  transition: background-color 0.3s, color 0.3s;
}

header {
  background-color: var(--header-bg);
  color: var(--header-text);
  padding: 1rem;
  text-align: center;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

#theme-toggle {
  position: absolute;
  right: 1.5rem;
  background: none;
  border: 1px solid var(--header-text);
  border-radius: 50%;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--header-text);
  font-size: 1.2rem;
  line-height: 1;
  transition: background-color 0.3s;
}

#theme-toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

main {
  padding: 2rem;
  width: 100%;
  max-width: 800px;
}

#input-section, #result-section, #apply-section {
  background-color: var(--section-bg);
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 6px var(--shadow-color);
  margin-bottom: 2rem;
  transition: background-color 0.3s, box-shadow 0.3s;
}

h2 {
  color: var(--heading-color);
  border-bottom: 2px solid var(--heading-color);
  padding-bottom: 0.5rem;
}

#saju-form {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

#saju-form input {
  padding: 0.5rem;
  border: 1px solid var(--input-border);
  border-radius: 4px;
  background-color: var(--section-bg);
  color: var(--text-color);
}

/* Apply Form Styles */
#apply-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: bold;
}

.form-group input, .form-group textarea {
  padding: 0.75rem;
  border: 1px solid var(--input-border);
  border-radius: 4px;
  background-color: var(--section-bg);
  color: var(--text-color);
  font-size: 1rem;
}

.submit-btn {
  background-color: #4A90E2;
  color: white;
  padding: 1rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: bold;
  transition: background-color 0.3s ease;
}

.submit-btn:hover {
  background-color: var(--button-hover);
}

#saju-form button {
  background-color: #4A90E2;
  color: white;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

#saju-form button:hover {
  background-color: var(--button-hover);
}

#saju-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

#saju-table th, #saju-table td {
  padding: 0.75rem;
  text-align: center;
  border: 1px solid var(--border-color);
}

#saju-table thead {
  background-color: #4A90E2;
  color: white;
}