/* =====================================================
   PhotoLite - Toolbar Styles
   Left-side tool panel with modern button design
   ===================================================== */

/* Toolbar Container */
.toolbar {
    display: flex;
    flex-direction: column;
    width: var(--toolbar-width);
    padding: var(--spacing-sm);
    background: var(--panel-bg);
    backdrop-filter: var(--glass-blur);
    border-right: var(--glass-border);
    gap: var(--spacing-sm);
    overflow-y: auto;
    overflow-x: hidden;
}

/* Tool Groups */
.tool-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--panel-border);
}

.tool-group:last-of-type {
    border-bottom: none;
}

/* Tool Separator */
.tool-separator {
    height: 1px;
    background: var(--panel-border);
    margin: var(--spacing-sm) 0;
}

/* Tool Buttons */
.tool-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.tool-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-md);
    background: transparent;
    transition: background var(--transition-fast);
}

.tool-btn:hover {
    color: var(--text-primary);
}

.tool-btn:hover::before {
    background: var(--panel-hover);
}

.tool-btn.active {
    color: white;
}

.tool-btn.active::before {
    background: rgba(255, 255, 255, 0.1);
}

.tool-btn svg {
    position: relative;
    z-index: 1;
    stroke: currentColor;
    transition: stroke var(--transition-fast);
}

/* Active indicator */
.tool-btn.active::after {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: white;
    border-radius: 0 2px 2px 0;
}

/* Tool Tooltip */
.tool-btn[title] {
    position: relative;
}

.tool-btn[title]:hover::after {
    content: attr(title);
    position: absolute;
    left: calc(100% + 8px);
    top: 50%;
    transform: translateY(-50%);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--panel-bg-solid);
    border: var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.75rem;
    white-space: nowrap;
    z-index: 1000;
    box-shadow: var(--shadow-md);
    pointer-events: none;
    animation: tooltipFade 0.2s ease;
}

/* Override for active state tooltip */
.tool-btn.active[title]:hover::after {
    content: attr(title);
}

@keyframes tooltipFade {
    from {
        opacity: 0;
        transform: translateY(-50%) translateX(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(-50%) translateX(0);
    }
}

/* Color Pickers */
.color-pickers {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
}

.color-picker-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.color-picker-wrapper label {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.color-input {
    width: 36px;
    height: 36px;
    padding: 0;
    border: 2px solid var(--panel-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    background: transparent;
    overflow: hidden;
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.color-input:hover {
    border-color: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.color-input::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-input::-webkit-color-swatch {
    border: none;
    border-radius: var(--radius-sm);
}

.color-input::-moz-color-swatch {
    border: none;
    border-radius: var(--radius-sm);
}

/* Tool Options */
.tool-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-xs);
}

.tool-options label {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-align: center;
}

.tool-options input[type="range"] {
    width: 100%;
    height: 4px;
    appearance: none;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.tool-options input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 14px;
    height: 14px;
    background: white;
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.tool-options input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

.tool-options input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

.tool-options span {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-align: center;
    font-weight: 500;
}

/* Stroke Width Option */
.stroke-width-option {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-xs);
    border-top: 1px solid var(--panel-border);
    margin-top: var(--spacing-sm);
}

/* Panel Button */
.panel-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.panel-btn:hover {
    background: var(--panel-hover);
    color: var(--text-primary);
}

.panel-btn svg {
    stroke: currentColor;
}

/* Keyboard Shortcut Indicator */
.tool-btn .shortcut {
    position: absolute;
    bottom: 2px;
    right: 2px;
    font-size: 0.6rem;
    color: var(--text-muted);
    font-weight: 600;
    opacity: 0.7;
}

/* Tool Button States */
.tool-btn:focus {
    outline: none;
}

.tool-btn:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.5);
    outline-offset: 2px;
}

/* Disabled State */
.tool-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.tool-btn:disabled:hover::before {
    background: transparent;
}

/* Sub-tool Indicator */
.tool-btn.has-subtool::after {
    content: '';
    position: absolute;
    bottom: 4px;
    right: 4px;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-top: 4px solid var(--text-muted);
}

/* Tool Icon Animations */
.tool-btn svg {
    transition: transform var(--transition-fast);
}

.tool-btn:active svg {
    transform: scale(0.9);
}

/* Brush Preview Circle */
.brush-preview {
    position: fixed;
    pointer-events: none;
    border: 2px solid white;
    border-radius: 50%;
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: 9999;
}

.brush-preview.visible {
    opacity: 1;
}