:root {
  --bg-color: #f0f0f0;
  --container-bg: #ffffff;
  --text-color: #333333;
  --ball-bg: #FFFF00;
  --ball-text: #000000;
  --primary-btn: #008CBA;
  --reset-btn: #f44336;
  --modal-overlay: rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] {
  --bg-color: #1a1a1a;
  --container-bg: #2d2d2d;
  --text-color: #f0f0f0;
  --ball-bg: #ffd700;
  --ball-text: #000000;
  --primary-btn: #005f7a;
  --reset-btn: #b33027;
  --modal-overlay: rgba(0, 0, 0, 0.8);
}

body {
  font-family: sans-serif;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  min-height: 100vh;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
  margin: 0;
  padding: 40px 0;
}

.container {
  text-align: center;
  background-color: var(--container-bg);
  padding: 40px;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  max-width: 90%;
  width: 500px;
  margin-bottom: 20px;
}

.theme-toggle {
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 8px 16px;
  border-radius: 20px;
  border: 1px solid var(--text-color);
  background: transparent;
  color: var(--text-color);
  cursor: pointer;
}

.numbers-container {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 10px;
}

.number {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--ball-bg);
  color: var(--ball-text);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 24px;
  font-weight: bold;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.buttons button {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  border: none;
  border-radius: 5px;
  margin: 10px;
  transition: opacity 0.2s;
}

.buttons button:hover {
  opacity: 0.8;
}

#generate-btn {
  background-color: var(--primary-btn);
  color: white;
}

#reset-btn {
  background-color: var(--reset-btn);
  color: white;
}

.footer-links {
  margin-top: 30px;
  border-top: 1px solid var(--text-color);
  padding-top: 20px;
  opacity: 0.7;
}

.footer-links a {
  color: var(--text-color);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-links a:hover {
  text-decoration: underline;
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: var(--modal-overlay);
  backdrop-filter: blur(5px);
}

.modal-content {
  background-color: var(--container-bg);
  margin: 10% auto;
  padding: 30px;
  border-radius: 15px;
  width: 90%;
  max-width: 450px;
  position: relative;
  box-shadow: 0 15px 50px rgba(0,0,0,0.3);
  animation: modalFadeIn 0.3s ease-out;
}

@keyframes modalFadeIn {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

.close-button {
  position: absolute;
  right: 20px;
  top: 15px;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
  color: var(--text-color);
  opacity: 0.5;
}

.close-button:hover {
  opacity: 1;
}

.form-group {
  margin-bottom: 20px;
  text-align: left;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: bold;
  font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: inherit;
  box-sizing: border-box;
}

[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group textarea {
  border-color: #444;
}

.form-group textarea {
  height: 120px;
  resize: vertical;
}

.submit-btn {
  width: 100%;
  padding: 14px;
  background-color: var(--primary-btn);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: bold;
  transition: transform 0.1s;
}

.submit-btn:active {
  transform: scale(0.98);
}

/* Success Modal UI */
.success-content {
  text-align: center;
}

.success-icon {
  font-size: 50px;
  color: #4CAF50;
  margin-bottom: 15px;
}

/* Comments Section */
.comments-section {
  text-align: left;
  padding: 40px;
  width: 800px;
  max-width: 95%;
}