* { box-sizing: border-box; }
  body {
    font-family: 'Inter', sans-serif;
    background: #1e1e2f;
    color: #f0f0f0;
    margin: 0;
    padding: 0;
  }
  header {
    text-align: center;
    padding: 20px;
    background: #28293d;
    color: #ffd700;
  }
  .container {
    display: flex;
    flex-direction: column;
    max-width: 900px;
    margin: 20px auto;
    padding: 20px;
    background: #2c2c3e;
    border-radius: 10px;
  }
  .tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
  }
  .tabs button {
    background: #3e3f5e;
    color: #f0f0f0;
    border: none;
    padding: 10px 20px;
    margin: 5px;
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.3s, transform 0.2s;
  }
  .tabs button:hover { background: #ffd700; color: #1e1e2f; }
  .tabs button:active { transform: scale(0.95); }
  .tab { display: none; }
  .tab.active { display: block; }
  form { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
  form label { display: flex; flex-direction: column; margin: 5px; min-width: 150px; }
  input, button { padding: 8px; border-radius: 5px; border: none; }
  input[type="number"], input[type="text"], input[type="date"] { width: 100%; }
  button.add, button.export, button.clear { background: #ffd700; color: #1e1e2f; font-weight: 600; margin-top: 10px; transition: transform 0.1s; }
  button.add:hover, button.export:hover, button.clear:hover { background: #e6c200; }
  table { width: 100%; border-collapse: collapse; margin-top: 20px; border-radius: 10px; overflow: hidden; }
  th, td { border: 1px solid #444; padding: 10px; text-align: center; }
  th { background: #3e3f5e; }
  tr:nth-child(even) { background: #2c2c3e; }
  @media(max-width: 768px) { form { flex-direction: column; align-items: center; } table, th, td { font-size: 12px; } }
  canvas { background: #2c2c3e; border-radius: 10px; padding: 10px; }

  footer {
  text-align: center;
  padding: 20px 10px;
  background-color: #28293d;
  color: #aaaaaa;
  font-size: 14px;
  margin-top: 20px;
  border-top: 1px solid #3e3f5e;
}

footer a {
  color: #ffd700;
  text-decoration: none;
  margin: 0 5px;
  display: inline-flex;
  align-items: center;
}

footer a:hover {
  color: #e6c200;
}

.footer-icon {
  width: 16px;
  height: 16px;
  margin-right: 5px;
  vertical-align: middle;
}

@media (max-width: 768px) {
  footer {
    font-size: 12px;
  }
  .footer-icon {
    width: 14px;
    height: 14px;
  }
}