*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  :root {
    --bg:       #0d0d0d;
    --bg2:      #111111;
    --green:    #33ff33;
    --teal:     #00ffaa;
    --blue:     #00bfff;
    --yellow:   #ffd700;
    --red:      #ff4444;
    --dim:      #4a8c4a;
    --white:    #d4d4d4;
    --prompt:   #00bfff;
    --font:     'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  }

  html, body {
    height: 100%;
    background: var(--bg);
    color: var(--green);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    overflow: hidden;
  }

  /* ── scrollbar ── */
  ::-webkit-scrollbar { width: 4px; }
  ::-webkit-scrollbar-track { background: transparent; }
  ::-webkit-scrollbar-thumb { background: #2a2a2a; border-radius: 2px; }

  /* ── layout ── */
  #terminal {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 8px;
  }

  /* top bar */
  #topbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 0 6px;
    border-bottom: 1px solid #1e1e1e;
    flex-shrink: 0;
  }
  .dot { width: 12px; height: 12px; border-radius: 50%; }
  .dot-r { background: #ff5f57; }
  .dot-y { background: #febc2e; }
  .dot-g { background: #28c840; }
  #topbar-title {
    color: var(--dim);
    font-size: 13px;
    margin-left: 4px;
    letter-spacing: .05em;
  }

  /* output area */
  #output {
    flex: 1;
    overflow-y: auto;
    padding: 14px 0 8px;
    scroll-behavior: smooth;
  }

  /* input row */
  #input-row {
    display: flex;
    align-items: center;
    padding: 6px 0 12px;
    flex-shrink: 0;
    gap: 0;
  }
  #prompt-label {
    color: var(--prompt);
    white-space: nowrap;
    user-select: none;
    margin-right: 6px;
  }
  #cmd-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--green);
    font-family: var(--font);
    font-size: 16px;
    caret-color: var(--green);
  }

  /* ── output nodes ── */
  .line { white-space: pre-wrap; word-break: break-word; }
  .line + .line { margin-top: 0; }

  .c-prompt  { color: var(--prompt); }
  .c-cmd     { color: var(--green); }
  .c-output  { color: var(--white); }
  .c-accent  { color: var(--teal); }
  .c-yellow  { color: var(--yellow); }
  .c-red     { color: var(--red); }
  .c-dim     { color: var(--dim); }
  .c-section { color: var(--yellow); font-weight: 700; }

  a { color: var(--teal); text-decoration: underline; }
  a:hover { color: var(--green); }

  .mb1 { margin-bottom: 4px; }
  .mt1 { margin-top: 6px; }

  /* ── typing cursor on greeting ── */
  @keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }
  .cursor {
    display: inline-block;
    width: .55em; height: 1.1em;
    background: var(--green);
    vertical-align: text-bottom;
    animation: blink 1s step-end infinite;
    margin-left: 1px;
  }

  /* mobile */
  @media (max-width: 768px) {
    html, body { font-size: 14px; }
    #terminal { padding: 0 6px; }
  }