src/components/Whiteboard.css

.whiteboard {
  width: 100%;
  max-width: 100%;
  min-height: var(--board-min-height);
  height: var(--board-max-height);
  max-height: var(--board-max-height);
  flex: 1;
  box-sizing: border-box;
  background: #FFFFF0;
  border: 4px solid #C8860A;
  border-radius: 12px;
  padding: 40px 48px;
  box-shadow: 0 6px 20px rgba(180, 100, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.9);
  display: block;
  transform: translate(var(--board-shift-x), var(--board-shift-y)) scale(var(--board-scale));
  transform-origin: center top;
  margin: 0 auto;
  overflow-y: scroll;
  overflow-x: hidden;
  scrollbar-gutter: stable;
  scrollbar-width: auto;
  scrollbar-color: #DAA520 #f1f1f1;
}

.whiteboard {
  -webkit-overflow-scrolling: touch;
}

.whiteboard-content {
  width: 100%;
  min-height: 100%;
  display: block;
  padding-right: 8px;
}

.whiteboard-markdown {
  font-size: 22px;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #3A2800;
  line-height: 1.65;
  text-align: left;
  font-style: normal;
  margin: 0;
  padding: 0;
  animation: fadeIn 0.5s ease-in;
}

.whiteboard-markdown > :first-child {
  margin-top: 0;
}

.whiteboard-markdown > :last-child {
  margin-bottom: 0;
}

.whiteboard-markdown h1,
.whiteboard-markdown h2,
.whiteboard-markdown h3 {
  color: #2F2100;
  margin: 10px 0 8px;
  line-height: 1.3;
}

.whiteboard-markdown h1 {
  font-size: 31px;
}

.whiteboard-markdown h2 {
  font-size: 27px;
}

.whiteboard-markdown h3 {
  font-size: 24px;
}

.whiteboard-markdown p {
  margin: 0 0 10px;
}

.whiteboard-markdown ul,
.whiteboard-markdown ol {
  margin: 0 0 12px 24px;
}

.whiteboard-markdown li {
  margin-bottom: 4px;
}

.whiteboard-markdown strong {
  color: #2A1B00;
}

.whiteboard-markdown blockquote {
  margin: 10px 0;
  padding: 8px 12px;
  border-left: 4px solid #D9A52E;
  background: #FFF6D9;
  border-radius: 6px;
}

.whiteboard-markdown code {
  background: rgba(58, 40, 0, 0.08);
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 0.86em;
}

.whiteboard-markdown pre {
  background: #FFF4CD;
  border: 2px solid #D5AB41;
  border-radius: 10px;
  padding: 12px;
  overflow-x: auto;
}

.whiteboard-markdown pre code {
  background: transparent;
  padding: 0;
}

.whiteboard-markdown table {
  width: 100%;
  border-collapse: collapse;
  margin: 10px 0 14px;
  font-size: 0.85em;
}

.whiteboard-markdown th,
.whiteboard-markdown td {
  border: 2px solid #D8BC67;
  padding: 6px 8px;
}

.whiteboard-markdown th {
  background: #FFE9A7;
}

.whiteboard-previews {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.whiteboard-visual-loader {
  margin-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 999px;
  border: 2px solid #D9A52E;
  background: #FFF6D9;
  color: #6A4700;
  font-size: 15px;
  font-weight: 700;
}

.whiteboard-visual-loader-spinner {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 3px solid rgba(179, 119, 8, 0.22);
  border-top-color: #B37708;
  animation: whiteboardSpinner 0.9s linear infinite;
}

.preview-card {
  margin: 0;
  border: 2px solid #C8860A;
  border-radius: 10px;
  overflow: hidden;
  background: #fffdf4;
  box-shadow: 0 4px 10px rgba(140, 90, 10, 0.15);
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-card img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: #fffaf0;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes whiteboardSpinner {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Scrollbar per testi lunghi */
.whiteboard::-webkit-scrollbar {
  width: 8px;
}

.whiteboard::-webkit-scrollbar-track {
  background: #f1f1f1;
}

.whiteboard::-webkit-scrollbar-thumb {
  background: #DAA520;
  border-radius: 4px;
}

.whiteboard::-webkit-scrollbar-thumb:hover {
  background: #B8860B;
}

@media (max-width: 768px) {
  .whiteboard {
    border-width: 3px;
    border-radius: 10px;
    padding: 22px 18px;
  }

  .whiteboard-content {
    padding-right: 2px;
  }

  .whiteboard-markdown {
    font-size: 18px;
    line-height: 1.58;
  }

  .whiteboard-markdown h1 {
    font-size: 25px;
  }

  .whiteboard-markdown h2 {
    font-size: 22px;
  }

  .whiteboard-markdown h3 {
    font-size: 20px;
  }

  .whiteboard-previews {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .whiteboard-visual-loader {
    font-size: 13px;
    padding: 9px 12px;
  }
}

@media (max-width: 480px) {
  .whiteboard {
    padding: 16px 12px;
  }

  .whiteboard-markdown {
    font-size: 16px;
  }

  .whiteboard-markdown ul,
  .whiteboard-markdown ol {
    margin-left: 18px;
  }
}