body {
  background-color: #0a0a0a;
  color: #00ff41;
  font-family: "Share Tech Mono", monospace;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  font-size: 18px;
}

.container {
  width: 80%;
  max-width: 800px;
  background-color: #111;
  border: 1px solid #00ff41;
  padding: 30px;
  box-shadow: 0 0 15px rgba(0, 255, 65, 0.2);
  text-align: center;
}

h1,
h2,
h3 {
  text-transform: uppercase;
  letter-spacing: 2px;
}

input[type="text"] {
  background-color: #000;
  border: 1px solid #00ff41;
  color: #00ff41;
  padding: 10px;
  width: 80%;
  margin: 15px 0;
  font-family: inherit;
  text-align: center;
}

button {
  background-color: #00ff41;
  color: #000;
  border: none;
  padding: 10px 20px;
  font-family: inherit;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.3s ease;
}

button:hover {
  background-color: #000;
  color: #00ff41;
  border: 1px solid #00ff41;
}

.code-block {
  background-color: #000;
  padding: 20px;
  margin: 20px auto;
  border: 1px dashed #00ff41;
  word-wrap: break-word;
  letter-spacing: 1px;
}

.error {
  color: #ff0000;
  height: 20px;
}

.hidden {
  display: none;
}

.active {
  display: block;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #00ff41;
  margin-bottom: 20px;
}

#timer {
  font-size: 1.5em;
  font-weight: bold;
}

#leaderboard {
  margin-top: 40px;
  border-top: 1px solid #00ff41;
  padding-top: 20px;
}

#leaderboard-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}

#leaderboard-table th,
#leaderboard-table td {
  border: 1px solid #00ff41;
  padding: 10px;
  text-align: center;
}

#leaderboard-table th {
  background-color: #00ff41;
  color: #000;
}

#submission-status {
  margin-top: 20px;
}

.success-status {
  color: #00ff41;
}

.error-status {
  color: #ff6b6b;
}