body {
  margin: 0;
  padding: 2rem;
  font-family: 'Courier New', monospace;
  height: 100vh;
  overflow: hidden;
  transition: background-color 0.3s, color 0.3s;
}

body.dark {
  background-color: #000;
  color: #33ff33;
}

body.light {
  background-color: #fdfdfd;
  color: #222;
}

canvas#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 0;
  pointer-events: none;
}

.terminal {
  position: relative;
  z-index: 1;
  max-width: 100%;
  margin: auto;
  padding: 1rem;
  border: 2px solid currentColor;
  height: 90vh;
  box-sizing: border-box;
  background-color: rgba(0, 0, 0, 0.85);
  overflow-y: auto;
  overflow-x: hidden;
  word-wrap: break-word;
}

body.light .terminal {
  background-color: rgba(255, 255, 255, 0.9);
}

#intro {
  position: sticky;
  top: 0;
  background: inherit;
  padding-bottom: 1rem;
  z-index: 2;
}

.prompt {
  font-weight: bold;
  white-space: nowrap;
}

.input-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

#terminal-input {
  background: transparent;
  border: none;
  color: inherit;
  font-family: inherit;
  font-size: 1em;
  outline: none;
  caret-color: currentColor;
  flex-grow: 1;
  min-width: 100px;
}

.output-line {
  margin: 0.2rem 0;
  animation: fadeIn 0.3s ease-in-out;
  word-break: break-word;
}

.output-line span.file::after { content: ""; }
.output-line span.dir::after  { content: "/"; }

a {
  color: inherit;
  text-decoration: underline;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
  body {
    padding: 1rem;
  }

  .terminal {
    font-size: 0.9em;
  }

  #terminal-input {
    font-size: 0.95em;
  }
}