body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f5f6f8;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 15px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  margin: 20px;
  position: sticky;
  top: 10px;
  z-index: 10;
}

.toolbar select,
.toolbar input[type="color"],
.toolbar button {
  border: none;
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 14px;
  background: #f2f3f5;
  cursor: pointer;
  transition: all 0.2s ease;
}

.toolbar select:hover,
.toolbar button:hover {
  background: #e9eaec;
}

.toolbar button {
  min-width: 35px;
}

.editor-container {
  width: 90%;
  max-width: 900px;
}

.editor {
  min-height: 500px;
  background: #fff;
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.06);
  border: 1px solid #e0e0e0;
  font-size: 16px;
  line-height: 1.6;
  outline: none;
}

.editor h1 { font-size: 28px; font-weight: 600; }
.editor h2 { font-size: 22px; font-weight: 500; }
.editor b { font-weight: 600; }
.editor i { font-style: italic; }
.editor u { text-decoration: underline; }

@media(max-width: 700px) {
  .toolbar {
    flex-wrap: wrap;
    justify-content: center;
  }
  .editor {
    min-height: 300px;
  }
}