/* Reset básico */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  background-color: #1b1b1b;
  color: #dddddd;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem;
  user-select: none;
}

.error-404-container {
  max-width: 480px;
}

.error-code {
  font-size: 8rem;
  font-weight: bold;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
  color: #e7e7e7;
}

.error-title {
  font-size: 1.8rem;
  font-weight: bold;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  color: #d3d3d3;
}

.error-message {
  font-size: 1rem;
  margin-bottom: 2rem;
  color: #666;
  line-height: 1.5;
}

.button {
  display: inline-block;
  padding: 0.75rem 2rem;
  font-weight: bold;
  font-size: 1rem;
  color: #222;
  background-color: #bbb;
  border-radius: 6px;
  text-decoration: none;
  border: 2px solid #222;
  transition: background-color 0.3s, color 0.3s;
  user-select: none;
}

.button:hover,
.button:focus {
  background-color: #222;
  color: #fff;
  outline: none;
}

@media (max-width: 480px) {
  .error-code {
    font-size: 6rem;
  }
  .error-title {
    font-size: 1.5rem;
  }
}