body {
  font-family: sans-serif;
  background: #0f0f0f;
  color: #fff;
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 1200px;
  margin: auto;
}

h1 {
  text-align: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
}

#gainers-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
  justify-content: center;
}

.gainer {
  background: #1e1e1e;
  padding: 10px 15px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s ease;
}

.gainer:hover {
  background: #333;
}

.chart {
  width: 100%;
  height: 400px;
}

.alert {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: #ff4444;
  color: white;
  padding: 10px 20px;
  border-radius: 10px;
  font-weight: bold;
  z-index: 9999;
  box-shadow: 0 0 10px #ff4444;
}

@media screen and (max-width: 768px) {
  .chart {
    height: 300px;
  }
  h1 {
    font-size: 1.2rem;
  }
}