:root {
  --neon-green: #00ff41; /* Classic Matrix Green */
  --bg-dark: #0a0a0a;
  --glass: rgba(255, 255, 255, 0.05);
}

body {
  margin: 0;
  font-family: 'Courier New', Courier, monospace;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: var(--bg-dark);
  color: var(--neon-green);
  overflow: hidden;
}

.login-container {
  background: var(--glass);
  padding: 3rem;
  border: 1px solid var(--neon-green);
  border-radius: 4px;
  box-shadow: 0 0 20px rgba(0, 255, 65, 0.2);
  width: 350px;
  backdrop-filter: blur(10px);
}

h2 {
  text-align: center;
  letter-spacing: 4px;
  margin-bottom: 2rem;
  text-shadow: 0 0 8px var(--neon-green);
}

/* Floating Label Input Logic */
.input-group {
  position: relative;
  margin-bottom: 1.5rem;
}

.input-group input {
  width: 100%;
  padding: 10px 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--neon-green);
  outline: none;
  color: #fff;
  font-size: 1rem;
}

.input-group label {
  position: absolute;
  top: 0;
  left: 0;
  padding: 10px 0;
  pointer-events: none;
  transition: 0.3s;
  opacity: 0.5;
}

.input-group input:focus ~ label,
.input-group input:valid ~ label {
  top: -20px;
  font-size: 0.8rem;
  color: var(--neon-green);
  opacity: 1;
}

button {
  width: 100%;
  background: transparent;
  border: 1px solid var(--neon-green);
  color: var(--neon-green);
  padding: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  letter-spacing: 2px;
}

button:hover {
  background: var(--neon-green);
  color: var(--bg-dark);
  box-shadow: 0 0 30px var(--neon-green);
}

#result {
  margin-top: 1rem;
  font-size: 0.8rem;
  text-align: center;
  min-height: 1.2em;
}