/* Options bar (contextual to active tool) */
#options-bar {
    background: var(--optionsbar-bg);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 6px;
    gap: 6px;
    overflow-x: auto;
    overflow-y: hidden;
}
#options-bar::-webkit-scrollbar { height: 6px; }

.ob-tool-preview {
    width: 24px; height: 24px;
    display: flex; align-items: center; justify-content: center;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 2px;
    margin-right: 4px;
}
.ob-tool-preview svg { width: 16px; height: 16px; color: var(--text); }

.ob-group {
    display: flex;
    align-items: center;
    gap: 4px;
    padding-right: 6px;
    border-right: 1px solid var(--border);
    height: 22px;
}
.ob-group:last-child { border-right: 0; }
.ob-label { color: var(--text-muted); margin-right: 4px; }

.ob-select, .ob-input {
    height: 22px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text);
    padding: 0 6px;
    border-radius: 2px;
    outline: none;
    min-width: 50px;
}
.ob-input-num { width: 50px; text-align: right; }

.ob-range {
    appearance: none;
    width: 90px;
    height: 18px;
    background: transparent;
    cursor: pointer;
    padding: 0;
    margin: 0 2px;
}
.ob-range::-webkit-slider-runnable-track {
    height: 4px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 2px;
}
.ob-range::-webkit-slider-thumb {
    appearance: none;
    width: 12px; height: 12px;
    background: var(--accent);
    border: 1px solid #fff;
    border-radius: 50%;
    margin-top: -5px;
    box-shadow: 0 1px 2px rgba(0,0,0,.4);
}
.ob-range::-moz-range-track {
    height: 4px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 2px;
}
.ob-range::-moz-range-thumb {
    width: 12px; height: 12px;
    background: var(--accent);
    border: 1px solid #fff;
    border-radius: 50%;
}

.ob-toggle {
    width: 22px; height: 22px;
    display: inline-flex; align-items: center; justify-content: center;
    color: var(--text-muted);
    border-radius: 2px;
    cursor: pointer;
}
.ob-toggle:hover { background: var(--hover-bg); color: var(--text); }
.ob-toggle.active { background: var(--tool-active); color: var(--text); box-shadow: inset 0 0 0 1px var(--accent); }

/* Inline checkbox label (with text) for options bar */
.ob-check {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    height: 22px;
    padding: 0 6px;
    color: var(--text);
    font-size: 11px;
    white-space: nowrap;
    border-radius: 2px;
    cursor: pointer;
    user-select: none;
}
.ob-check:hover { background: var(--hover-bg); }
.ob-check input[type="checkbox"] {
    accent-color: var(--accent);
    margin: 0;
    cursor: pointer;
}

.ob-btn {
    height: 22px;
    padding: 0 8px;
    background: var(--button-bg);
    color: var(--text);
    border: 1px solid var(--input-border);
    border-radius: 2px;
    cursor: pointer;
    font-size: 11px;
}
.ob-btn:hover { background: var(--button-bg-hover); }

.ob-brush-preview {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 2px 6px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 2px;
    height: 22px;
    cursor: pointer;
}
.ob-brush-preview .dot {
    width: 10px; height: 10px;
    background: currentColor;
    border-radius: 50%;
    display: inline-block;
}
.ob-brush-size {
    font-size: 10px;
    color: var(--text-muted);
}