.md-editor {
    border: 1px solid #d1d9e0;
    border-radius: 6px;
    background: #fff;
    overflow: hidden;
}

.md-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.15rem;
    padding: 0.35rem 0.45rem;
    border-bottom: 1px solid #d1d9e0;
    background: #f6f8fa;
}

.md-toolbar-sep {
    width: 1px;
    align-self: stretch;
    margin: 0.15rem 0.35rem;
    background: #d1d9e0;
}

.md-heading-btn {
    display: inline-block;
    min-width: 1.35rem;
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0.02em;
}

.md-tabs {
    margin-left: auto;
    display: flex;
    gap: 0.15rem;
}

.md-tab {
    border: 1px solid transparent;
    background: transparent;
    border-radius: 6px 6px 0 0;
    padding: 0.25rem 0.65rem;
    font-size: 0.8rem;
    color: #656d76;
}

.md-tab.active {
    background: #fff;
    border-color: #d1d9e0 #d1d9e0 #fff;
    color: #1f2328;
    font-weight: 600;
}

.md-textarea {
    width: 100%;
    border: 0;
    padding: 0.75rem 0.85rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.875rem;
    line-height: 1.45;
    resize: vertical;
    outline: none;
    background: #fff;
}

.md-preview {
    min-height: 8rem;
    padding: 0.75rem 0.85rem;
}

.md-hint {
    padding: 0.35rem 0.85rem 0.55rem;
    font-size: 0.75rem;
    color: #656d76;
    border-top: 1px solid #f0f0f0;
}

.md-upload {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.85rem;
    height: 1.85rem;
    border-radius: 4px;
    cursor: pointer;
    color: #656d76;
}

.md-upload:hover {
    background: rgba(0, 0, 0, 0.06);
}

.md-upload.disabled {
    pointer-events: none;
    opacity: 0.45;
}

.md-upload input {
    display: none;
}