/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Arial', sans-serif;
}

body {
  background-color: #121212;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.container {
  width: 100%;
  max-width: 450px;
  text-align: center;
}

h1 {
  margin-bottom: 20px;
}

.timer-section {
  margin-bottom: 20px;
}

#timer {
  font-size: 3em;
  margin-bottom: 15px;
}

button {
  background-color: #1f1f1f;
  color: #fff;
  border: none;
  padding: 12px 20px;
  margin: 5px;
  font-size: 1em;
  border-radius: 10px;
  cursor: pointer;
  transition: 0.2s;
}

button:hover {
  background-color: #333;
}

input[type="number"] {
  padding: 10px;
  font-size: 1em;
  width: 80px;
  border-radius: 8px;
  border: none;
  margin: 5px;
}

.xp-section {
  margin-bottom: 20px;
}

.skins-section {
  margin-top: 20px;
}

.skins {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
}

.skin {
  background-color: #333;
  color: #fff;
  padding: 15px;
  border-radius: 12px;
  margin: 5px;
  flex: 1 1 30%;
  cursor: pointer;
  transition: 0.3s;
}

.skin.locked {
  opacity: 0.4;
  cursor: not-allowed;
}

.skin.equipped {
  border: 3px solid #ffd700;
  transform: scale(1.1);
}

/* Responsive */
@media (max-width: 480px) {
  button {
    width: 100%;
    margin: 5px 0;
  }
  .skin {
    flex: 1 1 100%;
  }
}