* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: #0d1117;
  color: #e6edf3;
  font-family: system-ui, sans-serif;
}

main { text-align: center; padding: 2rem; }

h1 { font-weight: 300; letter-spacing: 0.3em; }

button, .button {
  font-size: 1.1rem;
  padding: 0.6rem 1.4rem;
  margin: 0.3rem;
  border-radius: 8px;
  border: 1px solid #30363d;
  background: #21262d;
  color: #e6edf3;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
button:hover, .button:hover { background: #30363d; }

input {
  font-size: 1.1rem;
  padding: 0.6rem;
  margin: 0.3rem;
  border-radius: 8px;
  border: 1px solid #30363d;
  background: #0d1117;
  color: #e6edf3;
  text-align: center;
}

.bigcode {
  font-size: 5rem;
  letter-spacing: 0.4em;
  margin: 0.5rem 0 1.5rem;
  font-weight: 600;
}

.hint { color: #8b949e; font-size: 0.9rem; }

ul { list-style: none; padding: 0; }
li { margin: 0.5rem 0; }

#status { color: #8b949e; }

video {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  background: #000;
  object-fit: contain;
}

.overlay {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.6rem;
  z-index: 10;
}