html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: sans-serif;
  background: #000;
  color: #fff;
  overflow: hidden;
}

#particles-js {
  position: fixed;
  width: 100%;
  height: 100%;
  z-index: 0;
  top: 0;
  left: 0;
}

.content {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 60px;
}

.container {
  background: rgba(0, 0, 0, 0.7);
  padding: 20px;
  border-radius: 15px;
  max-width: 500px;
  width: 90%;
  box-shadow: 0 0 20px rgba(255,255,255,0.2);
}

h2 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: #4caf50;
}

input, select, button {
  width: 100%;
  padding: 10px;
  background: darkgray;
  opacity: 0.4;
  margin-top: 10px;
  border-radius: 6px;
  border: none;
  font-size: 1rem;
  box-sizing: border-box;
}

button {
  background: #ff4747;
  color: white;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background: #e03e3e;
}

label {
  margin-top: 10px;
  display: block;
}

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

.flex-row select,
.flex-row button {
  flex: 1;
}

#submit-loading {
  display: none;
  margin-left: 8px;
  animation: spin 1s linear infinite;
}

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

#fetch-catfact-button {
  margin-top: 10px;
  width: 100%;
  padding: 10px;
  font-size: 1rem;
  border: none;
  border-radius: 6px;
  background-color: #ff4747;
  color: white;
  cursor: pointer;
}

#responseModal {
  display: none;
  position: fixed;
  z-index: 10;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: rgba(0,0,0,0.6);
  align-items: center;
  justify-content: center;
}

#responseMessage {
  background: #111;
  padding: 20px;
  border-radius: 10px;
  text-align: center;
  max-width: 300px;
}

#date-time {
  text-align: center;
  margin-top: 20px;
  font-size: 0.9rem;
  color: #ccc;
}

#catfact-text {
  margin-top: 15px;
  font-style: italic;
  text-align: center;
}