/* Paint App Color Variables (scoped to .paint-app)
   References global variables from style.css */
.paint-app {
    /* Backgrounds */
    --paint-bg-primary: var(--neutral-900);
    --paint-bg-surface: var(--neutral-850);
    --paint-bg-elevated: var(--neutral-800);
    --paint-bg-muted: var(--neutral-700);

    /* Borders */
    --paint-border-subtle: var(--neutral-700);
    --paint-border-default: var(--neutral-600);

    /* Text */
    --paint-text-primary: var(--neutral-100);
    --paint-text-secondary: var(--neutral-400);
    --paint-text-muted: var(--neutral-500);

    /* Accent */
    --paint-accent: var(--hue-blue);
    --paint-accent-hover: color-mix(in srgb, var(--hue-blue) 80%, white);

    /* Semantic */
    --paint-success: var(--success-600);
    --paint-warning: var(--warning-300);
    --paint-error: var(--destructive-400);

    /* Layer Colors */
    --paint-mask-color: var(--destructive-400);
    --paint-drawing-color: var(--hue-blue);
    --paint-selection-color: rgba(71, 144, 255, 0.3);

    /* Layer Active Backgrounds - tinted for visual distinction */
    --paint-mask-layer-active-bg: #3a2a2a;
    --paint-drawing-layer-active-bg: #2a3a4a;
}

.paint-app * {
    box-sizing: border-box;
}

.paint-app textarea.paint-text-edit::placeholder {
    color: inherit;
    opacity: 0.5;
}

/* Icon placeholders - make them transparent to layout */
.paint-app .icon-placeholder {
    display: contents;
}

/* Panels */
.layers-panel {
    width: 200px;
    background: var(--paint-bg-elevated);
    border-right: 1px solid var(--paint-border-subtle);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.tools-panel {
    width: 220px;
    background: var(--paint-bg-elevated);
    border-left: 1px solid var(--paint-border-subtle);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow-y: auto;
}

.panel-header {
    padding: 10px 12px;
    font-weight: 600;
    font-size: var(--font-size-ui-sm);
    letter-spacing: 0.5px;
    color: var(--paint-text-muted);
    border-bottom: 1px solid var(--paint-border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-section {
    border-bottom: 1px solid var(--paint-border-subtle);
}

/* Canvas Area */
.canvas-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.canvas-toolbar {
    height: 36px;
    background: var(--paint-bg-elevated);
    border-bottom: 1px solid var(--paint-border-subtle);
    display: flex;
    align-items: center;
    padding: 0 8px;
    gap: 8px;
}

.toolbar-group {
    display: flex;
    gap: 2px;
}

.toolbar-btn {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 4px;
    color: var(--paint-text-primary);
    cursor: pointer;
    transition: all 0.15s;
}

.toolbar-btn:hover:not(.disabled) {
    background: var(--paint-bg-muted);
    border-color: var(--paint-border-default);
}

.toolbar-btn:active:not(.disabled) {
    background: var(--paint-border-default);
}

.toolbar-btn.disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.toolbar-separator {
    width: 1px;
    height: 20px;
    background: var(--paint-border-subtle);
    margin: 0 4px;
}

.toolbar-status {
    font-size: var(--font-size-ui-sm);
    color: var(--paint-text-muted);
}

#konva-holder {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: var(--paint-bg-surface);
    background-image:
        linear-gradient(45deg, var(--paint-bg-elevated) 25%, transparent 25%),
        linear-gradient(-45deg, var(--paint-bg-elevated) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--paint-bg-elevated) 75%),
        linear-gradient(-45deg, transparent 75%, var(--paint-bg-elevated) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

#loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--paint-text-muted);
}

.canvas-status-bar {
    height: 24px;
    background: var(--paint-bg-elevated);
    border-top: 1px solid var(--paint-border-subtle);
    display: flex;
    align-items: center;
    padding: 0 12px;
    gap: 20px;
    font-size: var(--font-size-ui-sm);
    color: var(--paint-text-muted);
}

/* Layer Panel */
.layer-actions {
    display: flex;
    gap: 4px;
}

.layer-actions button {
    background: transparent;
    border: 1px solid var(--paint-border-subtle);
    color: var(--paint-text-primary);
    height: 22px;
    border-radius: 3px;
    cursor: pointer;
    font-size: var(--font-size-body-sm);
    line-height: 1;
}

.layer-actions button:hover {
    background: var(--paint-border-default);
}

.layer-list {
    flex: 1;
    overflow-y: auto;
}

.layer-item {
    display: flex;
    align-items: center;
    padding: 8px 10px;
    gap: 8px;
    border-bottom: 1px solid var(--paint-border-subtle);
    cursor: pointer;
    transition: background 0.15s;
    border-left: 3px solid transparent;
}

.layer-item:hover {
    background: var(--paint-bg-elevated);
}

.layer-item.active {
    background: var(--paint-bg-muted);
    border-left-color: var(--paint-accent);
}

.layer-item.mask-layer {
    border-left-color: var(--paint-mask-color);
}

.layer-item.mask-layer.active {
    background: var(--paint-mask-layer-active-bg);
}

.layer-item.drawing-layer {
    border-left-color: var(--paint-drawing-color);
}

.layer-item.drawing-layer.active {
    background: var(--paint-drawing-layer-active-bg);
}

.layer-item .visibility-btn {
    background: none;
    border: none;
    color: var(--paint-text-muted);
    cursor: pointer;
    padding: 2px;
    font-size: var(--font-size-body-sm);
}

.layer-item .visibility-btn:hover {
    color: var(--paint-text-primary);
}

.layer-item .visibility-btn.hidden {
    opacity: 0.3;
}

.layer-item .layer-preview {
    width: 32px;
    height: 32px;
    background: var(--paint-border-default);
    border: 1px solid var(--paint-border-default);
    border-radius: 2px;
    flex-shrink: 0;
}

.layer-item .layer-name-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.layer-item .layer-name-row {
    display: flex;
    align-items: center;
    gap: 4px;
}

.layer-item .layer-name-text {
    font-size: var(--font-size-body-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.layer-item .layer-type-badge {
    font-size: var(--font-size-ui-2xs);
    padding: 1px 4px;
    border-radius: 2px;
    text-transform: uppercase;
    font-weight: 600;
}

.layer-item .layer-type-badge.mask {
    background: var(--paint-mask-color);
    color: white;
}

.layer-item .layer-type-badge.drawing {
    background: var(--paint-drawing-color);
    color: white;
}

.layer-item .layer-lock-icon {
    flex-shrink: 0;
    opacity: 0.6;
    display: flex;
    align-items: center;
}

.layer-item .layer-name-input {
    flex: 1;
    background: var(--paint-bg-muted);
    border: 1px solid var(--paint-accent);
    color: var(--paint-text-primary);
    padding: 2px 4px;
    font-size: var(--font-size-body-xs);
    min-width: 0;
    outline: none;
    border-radius: 2px;
}

.layer-options {
    padding: 10px 12px;
    border-top: 1px solid var(--paint-border-subtle);
}

.layer-options label {
    display: block;
    font-size: var(--font-size-ui-sm);
    color: var(--paint-text-muted);
    margin-bottom: 6px;
}

.layer-options input[type="range"] {
    width: 100%;
    accent-color: var(--paint-accent);
}

/* Tool Grid */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
    padding: 8px;
}

.tool-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 8px 4px;
    background: var(--paint-bg-muted);
    border: 1px solid var(--paint-border-subtle);
    border-radius: 4px;
    color: var(--paint-text-primary);
    cursor: pointer;
    transition: all 0.15s;
}

.tool-btn svg {
    width: 18px;
    height: 18px;
}

.tool-btn span {
    font-size: var(--font-size-ui-xs);
}

.tool-btn:hover {
    background: var(--paint-border-subtle);
    border-color: var(--paint-border-default);
}

.tool-btn.active {
    background: var(--paint-accent);
    border-color: var(--paint-accent);
}

/* Tool Options */
#tool-options-content {
    padding: 10px 12px;
}

.option-row {
    margin-bottom: 12px;
}

.option-row:last-child {
    margin-bottom: 0;
}

.option-row label {
    display: block;
    font-size: var(--font-size-ui-sm);
    color: var(--paint-text-muted);
    margin-bottom: 6px;
}

.option-row input[type="range"] {
    width: 100%;
    accent-color: var(--paint-accent);
}

.option-row input[type="text"],
.option-row select {
    width: 100%;
    background: var(--paint-bg-muted);
    border: 1px solid var(--paint-border-subtle);
    color: var(--paint-text-primary);
    padding: 6px 8px;
    border-radius: 3px;
    font-size: var(--font-size-body-xs);
}

.option-row input[type="checkbox"] {
    accent-color: var(--paint-accent);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: var(--font-size-body-xs);
    cursor: pointer;
}

/* Select Mode Buttons */
.select-mode-group {
    display: flex;
    gap: 4px;
}

.select-mode-btn {
    flex: 1;
    padding: 5px 8px;
    background: var(--paint-bg-muted);
    border: 1px solid var(--paint-border-subtle);
    color: var(--paint-text-muted);
    border-radius: 3px;
    font-size: var(--font-size-ui-sm);
    cursor: pointer;
    transition: all 0.15s ease;
}

.select-mode-btn:hover {
    background: var(--paint-border-subtle);
    color: var(--paint-text-primary);
}

.select-mode-btn.active {
    background: var(--paint-accent);
    border-color: var(--paint-accent);
    color: var(--shade-white);
}

.select-mode-btn.disabled,
.select-mode-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

/* Color Picker */
.color-picker-row {
    padding: 10px 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

#primary-color {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background: none;
}

.color-swatches {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.swatch {
    width: 20px;
    height: 20px;
    border-radius: 3px;
    cursor: pointer;
    border: 1px solid var(--paint-border-default);
    transition: transform 0.1s;
}

.swatch:hover {
    transform: scale(1.15);
}

.swatch.disabled {
    opacity: 0.3;
    cursor: not-allowed;
    position: relative;
}

.swatch.disabled:hover {
    transform: none;
}

/* Add a diagonal line to indicate disabled */
.swatch.disabled::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 10%;
    right: 10%;
    height: 1px;
    background: var(--paint-text-primary);
    transform: rotate(-45deg);
}

.color-picker-row.disabled #primary-color {
    cursor: not-allowed;
}

/* Buttons */
.button-group {
    padding: 10px 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.small-btn {
    flex: 1 1 calc(50% - 3px);
    padding: 6px 8px;
    background: var(--paint-bg-muted);
    border: 1px solid var(--paint-border-subtle);
    color: var(--paint-text-primary);
    border-radius: 3px;
    font-size: var(--font-size-ui-sm);
    cursor: pointer;
    transition: all 0.15s;
}

.small-btn:hover {
    background: var(--paint-border-subtle);
}

.small-btn.accent {
    background: var(--paint-accent);
    border-color: var(--paint-accent);
}

.small-btn.accent:hover {
    background: var(--paint-accent-hover);
}