body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  background-color: #121212;
  color: #e0e0e0;
  padding-bottom: 100px;
}

header {
  background-color: #1e1e1e;
  padding: 20px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

header h1 {
  margin: 0;
  font-size: 2rem;
  color: #ffffff;
}

.container {
  padding: 20px;
  max-width: 800px;
  margin: auto;
}

.input-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

input[type="text"] {
  padding: 10px;
  font-size: 1rem;
  border-radius: 6px;
  border: 1px solid #333;
  background-color: #1e1e1e;
  color: #fff;
}

button {
  padding: 10px;
  font-size: 1rem;
  border: none;
  border-radius: 6px;
  background-color: #007acc;
  color: white;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #005fa3;
}

.card {
  background-color: #1e1e1e;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.card a {
  color: #58a6ff;
  text-decoration: none;
}

.card a:hover {
  text-decoration: underline;
}

.spinner {
  border: 4px solid rgba(255, 255, 255, 0.2);
  border-top: 4px solid #007acc;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 20px auto;
}

.hidden {
  display: none;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}


.footer {
  text-align: center;
  padding: 20px;
  background-color: #1e1e1e;
  color: #888;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  font-size: 0.9rem;
  box-shadow: 0 -2px 8px rgba(0,0,0,0.5);
}

:root {
  --bg-color: #121212;
  --text-color: #e0e0e0;
  --card-color: #1e1e1e;
  --button-bg: #007acc;
  --button-hover: #005fa3;
}

body.light {
  --bg-color: #f4f4f4;
  --text-color: #222;
  --card-color: #fff;
  --button-bg: #007acc;
  --button-hover: #005fa3;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
}

.card {
  background-color: var(--card-color);
}

input, button {
  background-color: var(--card-color);
  color: var(--text-color);
}

.theme-toggle {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  font-size: 1rem;
  color: var(--text-color);
  cursor: pointer;
}