/**
 * Layers UI Styles
 * Photoshop-style layer stack
 */

/* =========================================================================
   Layer Item
   ========================================================================= */

.layer-item {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--color-bg-active);
    border: 1px solid var(--color-border-muted);
    border-radius: var(--radius-md);
    margin-bottom: 6px;
    overflow: hidden;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.layer-item:hover {
    border-color: var(--color-border);
}

.layer-item.selected {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 1px var(--color-accent);
}

.layer-item.dragging {
    opacity: 0.5;
    border-style: dashed;
    z-index: 9999 !important;
}

.layer-item.drag-over {
    border-color: var(--color-accent);
    background: var(--color-accent-muted);
}

.layer-item.drag-over-above {
    border-top: 3px solid var(--color-accent);
    margin-top: -2px;
}

.layer-item.drag-over-below {
    border-bottom: 3px solid var(--color-accent);
    margin-bottom: 4px;
}

/* Child Effect Layers (indented below parent) */
.layer-item.child-layer {
    margin-left: 24px;
    border-left: 2px solid var(--color-accent-muted);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.layer-item.child-layer .layer-drag-handle {
    visibility: hidden;
    width: 0;
    padding: 0;
}

/* Add Child Button */
.layer-add-child {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 4px;
    line-height: 1;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    opacity: 0;
}

.layer-item:hover .layer-add-child {
    opacity: 1;
}

.layer-add-child:hover {
    color: var(--color-accent);
    background: var(--color-accent-muted);
}

.layer-add-child .icon-material {
    font-size: 16px;
}

/* Layer Row (main info) */
.layer-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
}

/* Drag Handle */
.layer-drag-handle {
    color: var(--color-text-muted);
    cursor: grab;
    padding: 2px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    opacity: 0.5;
    transition: opacity var(--transition-fast);
}

.layer-drag-handle:hover {
    opacity: 1;
}

.layer-drag-handle:active {
    cursor: grabbing;
}

.base-layer .layer-drag-handle {
    visibility: hidden;
}

/* Visibility Toggle */
.layer-visibility {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 4px;
    line-height: 1;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.layer-visibility:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-hover);
}

.layer-visibility:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px var(--color-accent);
}

.layer-visibility:active {
    transform: scale(0.95);
}

.layer-visibility.visible {
    color: var(--color-accent);
}

.layer-visibility .icon-material {
    font-size: 18px;
}

/* Layer Thumbnail */
.layer-thumbnail {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: var(--color-bg-elevated);
    overflow: hidden;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.layer-thumbnail img,
.layer-thumbnail canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.layer-thumbnail .icon-material {
    font-size: 20px;
    color: var(--color-text-muted);
}

/* Layer Info */
.layer-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.layer-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: text;
    padding: 2px 4px;
    margin: -2px -4px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
}

.layer-name:hover {
    background: var(--color-bg-hover);
}

.layer-name.editing {
    background: var(--overlay-dark);
    border-color: var(--color-accent);
    outline: none;
}

.layer-type {
    font-size: 10px;
    color: var(--color-text-muted);
}

.layer-type.media {
    color: var(--color-secondary);
}

.layer-type.effect {
    color: var(--color-accent);
}

/* Layer Delete Button */
.layer-delete {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 4px;
    line-height: 1;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    opacity: 0;
}

.layer-item:hover .layer-delete {
    opacity: 1;
}

.layer-delete:hover {
    color: var(--color-error);
    background: var(--color-error-muted);
}

.layer-delete:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px var(--color-accent);
}

.layer-delete:active {
    transform: scale(0.95);
}

.layer-delete .icon-material {
    font-size: 16px;
}

/* Base layer cannot be deleted */
.layer-item.base-layer .layer-delete {
    display: none;
}

/* =========================================================================
   Layer Controls Row (blend mode, opacity)
   ========================================================================= */

.layer-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px 10px;
    border-top: 1px solid var(--color-border-muted);
    background: rgba(0, 0, 0, 0.15);
}

/* Params Expando Toggle */
.layer-params-toggle {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 2px;
    line-height: 1;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.layer-params-toggle:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-hover);
}

.layer-params-toggle:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px var(--color-accent);
}

.layer-params-toggle:active {
    transform: scale(0.95);
}

.layer-params-toggle .icon-material {
    font-size: 18px;
    transition: transform var(--transition-fast);
}

.layer-params-toggle.expanded .icon-material {
    transform: rotate(90deg);
}

/* Blend Mode Select */
.layer-blend-mode {
    flex: 0 0 auto;
    min-width: 70px;
    padding: 4px 24px 4px 8px;
    font-family: var(--font-body);
    font-size: 11px;
    background-color: var(--color-bg-elevated);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath fill='%2394a3b8' d='M5 7L1 3h8z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 6px center;
    border: 1px solid var(--color-border-muted);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    appearance: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.layer-blend-mode:hover {
    border-color: var(--color-border);
    color: var(--color-text-primary);
}

.layer-blend-mode:focus {
    outline: none;
    border-color: var(--color-accent);
}

/* Opacity Slider */
.layer-opacity-container {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 6px;
}

.layer-opacity {
    flex: 1;
    height: 4px;
    background: var(--color-border);
    border: none;
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.layer-opacity::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--color-ui);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--color-ui-glow);
}

.layer-opacity:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px var(--color-accent);
}

.layer-opacity-value {
    font-size: 10px;
    font-family: var(--font-mono);
    color: var(--color-text-muted);
    min-width: 32px;
    text-align: right;
}

/* Shorter slider when expando toggle is present */
.layer-params-toggle ~ .layer-blend-mode ~ .layer-opacity-container .layer-opacity {
    max-width: 100px;
}

/* =========================================================================
   Layer Stack (reversed order - top layer first visually)
   ========================================================================= */

layer-stack {
    display: flex;
    flex-direction: column;
}

/* =========================================================================
   Effect Layer Specific
   ========================================================================= */

.layer-item.effect-layer .layer-thumbnail {
    background: linear-gradient(180deg, var(--color-accent-muted) 0%, var(--color-bg-elevated) 100%);
}

/* =========================================================================
   Locked Layer
   ========================================================================= */

.layer-item.locked {
    opacity: 0.6;
}

.layer-item.locked .layer-controls {
    pointer-events: none;
}

.layer-lock-icon {
    color: var(--color-warning);
    font-size: 14px;
}

/* =========================================================================
   Effect Parameters (single-column layout)
   ========================================================================= */

effect-params {
    display: none;
    padding: 10px 12px;
    border-top: 1px solid var(--color-border-muted);
    background: rgba(0, 0, 0, 0.2);
}

.layer-item.params-expanded effect-params {
    display: block;
}

.layer-item.params-expanded effect-params.empty {
    display: none;
}

.effect-params-empty,
.effect-params-loading {
    font-size: 11px;
    color: var(--color-text-muted);
    font-style: italic;
}

.effect-params-header {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.effect-params-title {
    font-size: 10px;
    color: var(--color-text-muted);
    font-weight: 600;
}

.effect-params-controls {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Control group - single column layout */
.control-group {
    display: grid;
    grid-template-columns: 70px 1fr 40px;
    align-items: center;
    gap: 8px;
    min-height: 24px;
}

.control-label {
    font-size: 11px;
    color: var(--color-text-muted);
    text-transform: lowercase;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.control-value {
    font-size: 10px;
    font-family: var(--font-mono);
    color: var(--color-text-muted);
    text-align: right;
    min-width: 35px;
}

/* Slider control */
.control-slider {
    width: 100%;
    height: 4px;
    background: var(--color-border);
    border: none;
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.control-slider:hover {
    background: color-mix(in srgb, var(--color-ui) 30%, var(--color-border) 70%);
}

.control-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--color-ui);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--color-ui-glow);
    transition: transform var(--transition-fast);
}

.control-slider:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px var(--color-accent);
}

.control-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.control-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--color-ui);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

/* Dropdown control */
.control-dropdown {
    width: 100%;
    padding: 4px 24px 4px 8px;
    font-family: var(--font-body);
    font-size: 11px;
    background-color: var(--overlay-dark);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath fill='%2394a3b8' d='M5 7L1 3h8z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 6px center;
    border: 1px solid var(--color-border-muted);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    appearance: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    grid-column: 2 / 4;
}

.control-dropdown:hover {
    border-color: var(--color-border);
    color: var(--color-text-primary);
}

.control-dropdown:focus {
    outline: none;
    border-color: var(--color-accent);
}

/* Toggle control */
.control-toggle {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    grid-column: 2 / 4;
    justify-self: start;
}

.toggle-track {
    position: relative;
    width: 32px;
    height: 16px;
    background: var(--color-border);
    border-radius: 8px;
    transition: background var(--transition-fast);
}

.control-toggle.active .toggle-track {
    background: color-mix(in srgb, var(--color-ui) 50%, var(--color-border) 50%);
}

.toggle-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 12px;
    height: 12px;
    background: var(--color-text-muted);
    border-radius: 50%;
    transition: left var(--transition-fast), background var(--transition-fast);
}

.control-toggle.active .toggle-thumb {
    left: 18px;
    background: var(--color-ui-hover);
}

/* Color picker control */
.control-color-container {
    display: flex;
    align-items: center;
    gap: 8px;
    grid-column: 2 / 4;
}

.control-color {
    width: 24px;
    height: 24px;
    padding: 0;
    border: 1px solid var(--color-border-muted);
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: transparent;
}

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

.control-color::-webkit-color-swatch {
    border: none;
    border-radius: 2px;
}

.control-color-hex {
    font-size: 10px;
    font-family: var(--font-mono);
    color: var(--color-text-muted);
}

/* Button control */
.control-button {
    padding: 4px 12px;
    font-size: 10px;
    font-family: var(--font-body);
    background: var(--overlay-dark);
    border: 1px solid var(--color-border-muted);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    grid-column: 2 / 4;
    justify-self: start;
}

.control-button:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: var(--color-accent-muted);
}

/* Text input control */
.control-text,
.control-textarea {
    width: 100%;
    padding: 6px 8px;
    font-family: var(--font-body);
    font-size: 11px;
    background: var(--overlay-dark);
    border: 1px solid var(--color-border-muted);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    grid-column: 2 / 4;
    transition: border-color var(--transition-fast);
}

.control-text:hover,
.control-textarea:hover {
    border-color: var(--color-border);
}

.control-text:focus,
.control-textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.control-textarea {
    resize: vertical;
    min-height: 60px;
}