@import url('https://fonts.googleapis.com/css2?family=DM+Mono:ital,wght@0,300;0,400;1,300&family=Syne:wght@700;800&display=swap');

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

  :root {
    --ink: #ccd6f6;
    --paper: #0f1117;
    --accent: #2563eb;
    --muted: #8892b0;
    --line: rgba(255, 255, 255, 0.07);
    --canvas-bg: #161b27;
  }

  body {
    background: var(--paper);
    color: var(--ink);
    font-family: 'DM Mono', monospace;
    min-height: 100vh;
    display: grid;
    grid-template-rows: auto 1fr auto;
  }

  header {
    padding: 1.5rem 2rem;
    border-bottom: 1.5px solid var(--line);
    display: flex;
    align-items: baseline;
    gap: 1.5rem;
    background: var(--paper);
  }

  header h1 {
    font-family: 'Syne', sans-serif;
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
  }

  header span {
    font-size: 0.7rem;
    color: var(--muted);
    letter-spacing: 0.15em;
    text-transform: uppercase;
  }

  .workspace {
    display: grid;
    grid-template-columns: 1fr 280px;
    height: calc(100vh - 110px);
    overflow: hidden;
  }

  .canvas-area {
    position: relative;
    background: var(--canvas-bg);
    border-right: 1.5px solid var(--line);
    overflow: hidden;
  }

  canvas#draw {
    position: absolute;
    top: 0; left: 0;
    cursor: crosshair;
    touch-action: none;
  }

  /* Grid overlay */
  .canvas-area::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(var(--line) 1px, transparent 1px),
      linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.35;
    pointer-events: none;
    z-index: 1;
  }

  .sidebar {
    display: flex;
    flex-direction: column;
    background: var(--paper);
    overflow-y: auto;
  }

  .panel {
    padding: 1.25rem 1.5rem;
    border-bottom: 1.5px solid var(--line);
  }

  .panel-title {
    font-size: 0.65rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 1rem;
  }

  .btn-row {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
  }

  button {
    font-family: 'DM Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.05em;
    padding: 0.5rem 0.9rem;
    border: 1.5px solid var(--ink);
    background: transparent;
    color: var(--ink);
    cursor: pointer;
    transition: all 0.12s;
  }

  button:hover { background: var(--ink); color: var(--paper); }

  button.primary {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
    font-weight: 400;
  }
  button.primary:hover { background: #c9302a; border-color: #c9302a; }

  button.active {
    background: var(--ink);
    color: var(--paper);
  }

  button:disabled {
    opacity: 0.35;
    cursor: not-allowed;
  }
  button:disabled:hover { background: transparent; color: var(--ink); }

  .slider-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }

  .slider-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
  }

  .slider-row label {
    font-size: 0.68rem;
    color: var(--muted);
    width: 80px;
    flex-shrink: 0;
  }

  .slider-row input[type=range] {
    flex: 1;
    accent-color: var(--accent);
  }

  .slider-row .val {
    font-size: 0.68rem;
    width: 30px;
    text-align: right;
    color: var(--ink);
  }

  .path-list {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
  }

  .path-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.5rem;
    font-size: 0.68rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: border-color 0.1s;
  }

  .path-item:hover { border-color: var(--line); }
  .path-item.selected { border-color: var(--ink); background: rgba(0,0,0,0.03); }

  .path-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
  }

  .path-name { flex: 1; }
  .path-pts { color: var(--muted); }

  .path-del {
    opacity: 0;
    font-size: 0.75rem;
    cursor: pointer;
    color: var(--muted);
    border: none;
    background: none;
    padding: 0;
    transition: opacity 0.1s;
  }
  .path-item:hover .path-del { opacity: 1; }

  .preview-area {
    flex: 1;
    padding: 1.25rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }

  #preview-canvas {
    border: 1.5px solid var(--line);
    background: white;
    width: 100%;
    image-rendering: crisp-edges;
  }

  .status-bar {
    padding: 0.6rem 2rem;
    border-top: 1.5px solid var(--line);
    font-size: 0.65rem;
    color: var(--muted);
    letter-spacing: 0.1em;
    display: flex;
    gap: 2rem;
  }

  .status-dot {
    display: inline-block;
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--muted);
    margin-right: 0.4rem;
    vertical-align: middle;
  }
  .status-dot.recording { background: var(--accent); animation: pulse 0.8s infinite; }

  @keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
  }

  .color-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
  }

  .swatch {
    width: 20px; height: 20px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: border-color 0.1s;
  }
  .swatch.active { border-color: var(--ink); }

  .progress-bar {
    height: 2px;
    background: var(--line);
    position: relative;
    overflow: hidden;
  }

  .progress-fill {
    height: 100%;
    background: var(--accent);
    width: 0%;
    transition: width 0.05s;
  }

  .empty-hint {
    font-size: 0.68rem;
    color: var(--muted);
    font-style: italic;
    padding: 0.5rem 0;
  }