:root {
    --bg: #ffffff;
    --text: #1a1a1a;
    --text-muted: #999999;
    --border: #e5e5e5;
    --accent: #1a1a1a;
    --card-bg: #f7f7f7;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.04);
    --hover-bg: #f2f2f2;
  }

  body.site-dark {
    --bg: #111111;
    --text: #f0f0f0;
    --text-muted: #777777;
    --border: #2a2a2a;
    --accent: #f0f0f0;
    --card-bg: #1a1a1a;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.3);
    --hover-bg: #222222;
  }

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

  body {
    font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px 80px;
    transition: background 0.3s, color 0.3s;
  }

  header {
    text-align: center;
    margin-bottom: 48px;
    position: relative;
    width: 100%;
    max-width: 1200px;
  }

  .logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
  }

  .logo-mark {
    background: #111;
    color: #fff;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    padding: 6px 10px;
    border-radius: 8px;
    line-height: 1;
  }

  header h1 {
    font-size: 1.6rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    display: inline;
  }

  header p {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    font-weight: 400;
    margin-top: 6px;
  }

  body.site-dark .logo-mark {
    background: #fff;
    color: #111;
  }

  .site-theme-btn {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    border: 1.5px solid var(--border);
    border-radius: 50%;
    background: var(--card-bg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    color: var(--text);
  }

  .site-theme-btn:hover {
    border-color: var(--text-muted);
    background: var(--hover-bg);
  }

  .site-theme-btn svg { transition: transform 0.3s; }
  body.site-dark .site-theme-btn svg { transform: rotate(180deg); }

  .main-layout {
    display: flex;
    gap: 48px;
    max-width: 1200px;
    width: 100%;
    align-items: flex-start;
  }

  .preview-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 24px;
    min-width: 0;
  }

  .preview-container {
    position: relative;
    background: var(--card-bg);
    border-radius: 10px;
    box-shadow: var(--card-shadow);
    padding: 20px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    justify-content: center;
    transition: background 0.3s, box-shadow 0.3s;
  }

  .preview-desktop-wrap {
    flex: 1;
    max-width: 560px;
    min-width: 0;
  }

  .preview-mobile-wrap {
    width: 110px;
    flex-shrink: 0;
  }

  .preview-label {
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-align: center;
    font-weight: 500;
  }

  .preview-desktop-wrap canvas {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
    border: 3px solid #111;
  }

  .preview-mobile-wrap canvas {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 14px;
    border: 3px solid #111;
  }

  .controls {
    width: 280px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 24px;
  }

  .control-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .control-label {
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.22em;
    color: var(--text-muted);
    font-weight: 500;
  }

  .style-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .style-btn {
    aspect-ratio: 1;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    background: var(--card-bg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.3s;
    padding: 6px;
  }

  .style-btn:hover { border-color: var(--text-muted); }
  .style-btn.active {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent);
  }

  .style-btn canvas {
    width: 100%;
    height: 100%;
    border-radius: 4px;
  }

  .palette-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
  }

  .palette-swatch {
    width: 40px;
    height: 28px;
    border-radius: 6px;
    border: 1.5px solid var(--border);
    cursor: pointer;
    display: flex;
    overflow: hidden;
    transition: border-color 0.2s, box-shadow 0.2s;
  }

  .palette-swatch:hover { border-color: var(--text-muted); }
  .palette-swatch.active {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent);
  }

  .palette-swatch span { flex: 1; }

  .mode-toggle {
    display: flex;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
  }

  .mode-btn {
    flex: 1;
    padding: 9px 12px;
    border: none;
    background: var(--card-bg);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
  }

  .mode-btn + .mode-btn { border-left: 1.5px solid var(--border); }

  .mode-btn.active {
    background: var(--accent);
    color: var(--bg);
  }

  .mode-btn:not(.active):hover {
    background: var(--hover-bg);
  }

  .mode-icon {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 1.5px solid currentColor;
    position: relative;
    flex-shrink: 0;
  }

  .mode-btn.active .mode-icon { border-color: var(--bg); }

  .mode-icon-dark {
    background: linear-gradient(135deg, currentColor 50%, transparent 50%);
  }

  .mode-icon-light {
    background: linear-gradient(135deg, transparent 50%, currentColor 50%);
  }

  .seed-row {
    display: flex;
    gap: 8px;
    align-items: center;
  }

  .btn-shuffle {
    flex: 1;
    padding: 10px 16px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    background: transparent;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    transition: all 0.2s;
    color: var(--text);
  }

  .btn-shuffle:hover {
    border-color: var(--accent);
    background: var(--accent);
    color: var(--bg);
  }

  .export-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 4px;
  }

  .btn-export {
    padding: 13px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: opacity 0.2s, transform 0.1s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
  }

  .btn-export:active { transform: scale(0.98); }

  .btn-desktop {
    background: var(--accent);
    color: var(--bg);
  }

  .btn-mobile {
    background: transparent;
    border: 1.5px solid var(--accent);
    color: var(--accent);
  }

  .btn-export:hover { opacity: 0.85; }

  .size-hint {
    font-size: 0.55rem;
    color: var(--text-muted);
    text-align: center;
    letter-spacing: 0.06em;
    font-weight: 400;
  }

  @media (max-width: 800px) {
    body { padding: 24px 16px 80px; }
    header { margin-bottom: 28px; }
    header h1 { font-size: 1.2rem; }
    .site-theme-btn {
      position: static;
      transform: none;
      margin: 12px auto 0;
    }
    .main-layout {
      flex-direction: column;
      gap: 24px;
    }
    .preview-container {
      flex-direction: row;
      gap: 12px;
      padding: 12px;
    }
    .preview-desktop-wrap {
      flex: 1;
      max-width: none;
      min-width: 0;
    }
    .preview-mobile-wrap {
      width: 70px;
      flex-shrink: 0;
    }
    .controls {
      width: 100%;
      gap: 20px;
    }
    .style-grid {
      grid-template-columns: repeat(1, 1fr);
      gap: 6px;
    }
    .palette-row { gap: 6px; }
    .palette-swatch { width: 40px; height: 40px; }
    .export-group {
      flex-direction: row;
      flex-wrap: wrap;
    }
    .btn-export { flex: 1; min-width: 140px; }
    .size-hint { flex-basis: 100%; }
  }

  @media (max-width: 400px) {
    .style-grid { grid-template-columns: repeat(1, 1fr); }
    .preview-mobile-wrap { width: 60px; }
    .export-group { flex-direction: column; }
    .btn-export { min-width: 0; }
  }

  .modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.85);
    z-index: 1000;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    cursor: pointer;
  }

  .modal-overlay.active { display: flex; }

  .modal-overlay img {
    max-width: 90vw;
    max-height: 75vh;
    object-fit: contain;
    border-radius: 6px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.5);
  }

  .modal-hint {
    color: rgba(255,255,255,0.7);
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-top: 16px;
    font-weight: 400;
  }

  .modal-close {
    position: absolute;
    top: 20px;
    right: 24px;
    background: none;
    border: none;
    color: rgba(255,255,255,0.6);
    font-size: 1.5rem;
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.2s;
  }

  .modal-close:hover { background: rgba(255,255,255,0.1); }

  .modal-info {
    color: rgba(255,255,255,0.5);
    font-size: 0.6rem;
    letter-spacing: 0.08em;
    margin-top: 6px;
  }

  @media print {
    body { padding: 20px; }
    .controls { display: none; }
    .preview-container { box-shadow: none; border: 1px solid #ddd; }
    .site-footer { display: none; }
  }

  .site-footer {
    margin-top: 48px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.06em;
    width: 100%;
    max-width: 1200px;
  }

  .site-footer a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.2s;
  }

  .site-footer a:hover { opacity: 0.7; }

html, body {
  width: 100%;
  overflow-x: hidden;
}

.main-layout {
  width: 100%;
  max-width: 100%;
}

.preview-container {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
}

canvas {
  max-width: 100%;
  height: auto;
}

.style-grid {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.palette-row {
  width: 100%;
}

@media (max-width: 800px) {
  .preview-container {
    flex-direction: column !important;
    align-items: center;
  }

  .preview-desktop-wrap {
    width: 100%;
    max-width: 100%;
  }

  .preview-mobile-wrap {
    width: min(120px, 35vw);
  }

  .btn-export {
    min-width: 0 !important;
  }

  .export-group {
    flex-direction: column !important;
  }
}

/* --- CRITICAL ZOOM PREVENTION & APP LOCKS --- */
    html, body {
      width: 100%;
      overflow-x: hidden;
      /* Stops iOS safari and Chrome from bouncing/scaling on multi-touch gestures */
      touch-action: pan-x pan-y;
      -webkit-text-size-adjust: 100%;
    }