static/css/style.css

body {
  margin: 0;
  padding: 0;
  overflow: hidden;
}

.whiteboard-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
}

#whiteboard {
  width: 100%;
  height: 100%;
  cursor: crosshair;
  touch-action: none;
}

.brush-preview {
  position: fixed;
  pointer-events: none;
  border: 1px solid #000;
  border-radius: 50%;
  display: none;
}

.bottom-toolbar {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  z-index: 1000;
  transition: transform 0.3s ease;
}

.bottom-toolbar.hidden .toolbar-content {
  display: none;
}

.bottom-toolbar.hidden .toggle-btn .material-icons {
  transform: rotate(180deg);
}

.toggle-btn {
  position: absolute;
  left: 50%;
  transform: translateX(-50%) translateY(-100%);
  border-radius: 8px 8px 0 0;
  padding: 4px 16px;
  background: white;
  border: none;
  cursor: pointer;
  box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
}

.toggle-btn .material-icons {
  transition: transform 0.3s ease;
}

.toolbar-content {
  display: flex;
  flex-direction: row;
  gap: 20px;
  padding: 10px;
}

.tool-group {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 10px;
  border-right: 1px solid #eee;
}

.tool-group:last-child {
  border-right: none;
}

.tool-btn {
  padding: 8px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  background: #f5f5f5;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tool-btn.active {
  background: #e0e0e0;
  color: #2196F3;
}

.tool-btn .material-icons {
  font-size: 20px;
}

#colorPicker {
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

#brushSize {
  width: 100px;
}

#brushSizeLabel {
  min-width: 40px;
  text-align: center;
}

.page-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

#pageInfo {
  min-width: 80px;
  text-align: center;
}

.action-buttons {
  display: flex;
  gap: 10px;
}

.action-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 8px 16px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  background: #f5f5f5;
  color: #333;
}

.action-btn:hover {
  background: #e0e0e0;
}

.ai-btn {
  background: #2196F3;
  color: white;
}

.ai-btn:hover {
  background: #1976D2;
}

.submit-btn {
  background: #4CAF50;
  color: white;
}

.submit-btn:hover {
  background: #388E3C;
}

@media (max-width: 950px) {
  .bottom-toolbar {
    left: 0;
    bottom: 0;
    transform: translateX(0);
    width: auto;
    border-radius: 0 8px 8px 0;
    padding: 10px;
  }

  .toolbar-content {
    flex-direction: column;
    width: auto;
    gap: 10px;
    justify-content: flex-start;
    align-items: flex-start;
  }

  .tool-group {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 5px 0;
    border-right: none;
  }

  .tool-group:last-child {
    border-right: none;
  }

  .tool-btn {
    font-size: 16px;
    padding: 8px;
    width: 100%;
  }

  .tool-btn .material-icons {
    font-size: 18px;
  }

  #colorPicker,
  #brushSize {
    width: 50px;
    height: 50px;
    margin: 0 auto;
  }

  #brushSizeLabel {
    font-size: 12px;
  }

  .action-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: auto;
    justify-content: flex-start;
  }

  .action-btn {
    font-size: 12px;
    padding: 6px 12px;
    width: 100%;
  }

  .page-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: auto;
    align-items: flex-start;
  }

  #pageInfo {
    font-size: 12px;
    min-width: 60px;
    text-align: center;
  }

  .page-controls .action-btn {
    font-size: 14px;
    padding: 8px 12px;
    width: 100%;
  }

  #whiteboard {
    width: 100vw;
    height: 100vh;
  }

  .whiteboard-container {
    width: 100vw;
    height: 100vh;
  }

  .submit-btn,
  .ai-btn,
  .clear-btn {
    font-size: 14px;
    padding: 8px 16px;
    width: 100%;
  }
}