body {
  font-family: Arial, sans-serif;
  background: #111;
  color: #f5f5f5;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
  margin: 0;
}

.app {
  margin-top: 40px;
  background: #1b1b1b;
  padding: 20px 30px;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0,0,0,0.6);
  max-width: 650px;
  width: 100%;
}

h1, h2, h3 {
  text-align: center;
}

.login {
  margin-bottom: 20px;
}

.login input {
  width: 100%;
  padding: 8px;
  margin: 4px 0 10px;
  border-radius: 6px;
  border: 1px solid #333;
  background: #222;
  color: #f5f5f5;
}

button {
  cursor: pointer;
  padding: 10px 16px;
  border-radius: 8px;
  border: none;
  background: #3b82f6;
  color: white;
  font-weight: bold;
}

button:hover {
  background: #2563eb;
}

.big-btn {
  display: block;
  margin: 15px auto;
  font-size: 20px;
  padding: 15px 30px;
}

.hidden {
  display: none;
}

.balance {
  text-align: center;
  font-size: 18px;
  margin: 10px 0;
}

.shop-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.shop-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #222;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #333;
}

.shop-item-title {
  font-weight: bold;
}

.shop-item-price {
  font-size: 14px;
  opacity: 0.8;
}

.info {
  margin-top: 20px;
  font-size: 12px;
  color: #aaa;
}