.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    padding: var(--spacing-md) var(--spacing-xl);
    overflow: hidden;
    gap: var(--spacing-md);
}

.main-content {
    display: flex;
    flex: 1;
    gap: var(--layout-gap);
    overflow: hidden;
    min-height: 0;
}

.canvas-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    min-width: 0;
    min-height: 0;
}

.canvas-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-width: 0;
    min-height: 0;
}

.canvas-wrapper:has(.empty-state:not(.hidden)) {
    overflow: visible;
}

.canvas-stage {
    position: relative;
    flex-shrink: 0;
    max-width: 100%;
    max-height: 100%;
    line-height: 0;
}

.canvas-stage canvas {
    display: block;
    max-width: 100%;
    max-height: 100%;
}

.canvas-upload-new {
    position: absolute;
    bottom: var(--spacing-lg);
    left: var(--spacing-md);
    z-index: 4;
    opacity: 0;
    pointer-events: none;
    transform: translateY(6px);
    transition:
        opacity 0.2s ease,
        transform 0.2s ease;
}

.canvas-stage:hover .canvas-upload-new,
.canvas-stage:focus-within .canvas-upload-new {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.empty-state {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-light);
    gap: var(--spacing-xl);
    text-align: center;
    z-index: 2;
    padding: var(--spacing-lg);
    justify-content: center;
    cursor: pointer;
}

.empty-state.is-drag-over {
    background: rgba(255, 255, 255, 0.06);
    transition: background var(--transition-fast);
}

.empty-state-samples {
    position: relative;
    width: min(720px, 98vw);
    height: 360px;
    flex: 0 0 auto;
    pointer-events: auto;
    cursor: default;
    overflow: visible;
}

.empty-state-carousel {
    --carousel-drag-step: 72px;
    --carousel-card-width: 252px;
    --carousel-card-height: 315px;
    --cover-flow-shift: 200px;
    --cover-flow-scale-side: 0.88;
    --cover-flow-scale-hidden: 0.76;

    position: relative;
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-columns: 40px 1fr 40px;
    align-items: center;
    gap: var(--spacing-sm);
}

.empty-state-carousel__stage {
    position: relative;
    height: 100%;
    overflow: visible;
    perspective: 1600px;
    perspective-origin: 50% 50%;
    touch-action: manipulation;
    cursor: default;
}

.empty-state-carousel__stage.is-dragging {
    cursor: grabbing;
}

.empty-state-carousel__ring {
    position: absolute;
    left: 50%;
    top: 50%;
    width: var(--carousel-card-width);
    height: var(--carousel-card-height);
    margin-left: calc(var(--carousel-card-width) / -2);
    margin-top: calc(var(--carousel-card-height) / -2);
    transform-style: preserve-3d;
}

.empty-state-sample-card {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    border: none;
    border-radius: var(--radius-md);
    background: var(--surface-dark);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    cursor: pointer;
    pointer-events: auto;
    transform-style: preserve-3d;
    backface-visibility: hidden;
    transition:
        transform 0.55s cubic-bezier(0.4, 0, 0.2, 1),
        opacity 0.45s ease,
        box-shadow var(--transition-fast);
    will-change: transform, opacity;
}

.empty-state-sample-card img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
    user-select: none;
    -webkit-user-drag: none;
}

.empty-state-sample-card.is-active {
    box-shadow: 0 28px 56px -14px rgba(0, 0, 0, 0.8);
    cursor: pointer;
}

.empty-state-sample-card.is-side {
    box-shadow: 0 16px 32px -10px rgba(0, 0, 0, 0.55);
    cursor: pointer;
}

.empty-state-sample-card.is-hidden {
    box-shadow: none;
    pointer-events: none;
}

.empty-state-sample-card.is-active:hover,
.empty-state-sample-card.is-active:focus-visible {
    box-shadow: 0 32px 64px -12px rgba(0, 0, 0, 0.85);
}

.empty-state-sample-card.is-side:hover,
.empty-state-sample-card.is-side:focus-visible {
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.65);
}

.empty-state-sample-card:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 3px;
}

.empty-state-sample-card:disabled {
    opacity: 0.55;
    cursor: wait;
    pointer-events: none;
}

.empty-state-carousel__nav {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    margin: 0;
    padding: 0;
    border: none;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-light);
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    transition: background var(--transition-fast);
    z-index: 10;
}

.empty-state-carousel__nav:hover {
    background: rgba(255, 255, 255, 0.16);
}

.empty-state-carousel__nav:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

.empty-state-carousel__nav:disabled {
    opacity: 0.4;
    cursor: wait;
}

@media (prefers-reduced-motion: reduce) {
    .empty-state-sample-card {
        transition: opacity 0.2s ease;
    }
}

.empty-state-message {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: 0;
    padding-bottom: var(--spacing-xs);
    flex-shrink: 0;
    cursor: pointer;
    pointer-events: auto;
}

.upload-icon-wrapper {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: var(--spacing-sm);
    transition: background var(--transition-fast);
}

.empty-state:hover .upload-icon-wrapper {
    background: rgba(255, 255, 255, 0.2);
}

.empty-state-message h2 {
    font-size: var(--font-size-xl);
    margin-bottom: 0;
}

.empty-state-message p {
    color: var(--text-muted);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-md);
}

.empty-state-message .upload-btn {
    pointer-events: none;
}

.canvas-actions {
    display: flex;
    flex-shrink: 0;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding-top: var(--spacing-sm);
    padding-bottom: var(--spacing-md);
    min-height: 44px;
}

.canvas-actions.is-idle {
    visibility: hidden;
    pointer-events: none;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border-radius: var(--radius-full);
    background: var(--surface-dark);
    font-size: var(--font-size-sm);
    line-height: 1;
    padding: 8px 16px;
}

.action-btn .spectrum-icon {
    width: 18px;
    height: 18px;
}

.action-btn .spectrum-icon svg {
    width: 18px;
    height: 18px;
}

.sidebar {
    width: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    align-self: stretch;
    min-height: 0;
    max-height: 100%;
}

.sidebar-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    height: 100%;
    background: var(--surface-dark);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-md);
    overflow: hidden;
}

.sidebar-panel :where(.layer-list, .sidebar-scroll-region > *) {
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.sidebar-panel :where(.layer-list, .sidebar-scroll-region > *)::-webkit-scrollbar {
    display: none;
    width: 0;
    height: 0;
}

.sidebar-tabs {
    position: relative;
    display: flex;
    gap: 4px;
    padding: 4px;
    background: #0a0a0a;
    border-radius: var(--radius-full);
    flex-shrink: 0;
    margin-bottom: var(--spacing-sm);
}

.sidebar-tab-indicator {
    position: absolute;
    top: 4px;
    left: 4px;
    height: calc(100% - 8px);
    background: var(--text-light);
    border-radius: var(--radius-full);
    pointer-events: none;
    z-index: 0;
    transition:
        transform 0.28s cubic-bezier(0.4, 0, 0.2, 1),
        width 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform, width;
}

.sidebar-tab {
    position: relative;
    z-index: 1;
    flex: 1;
    min-width: 0;
    padding: 8px 10px;
    border: none;
    border-radius: var(--radius-full);
    background: transparent;
    color: var(--text-muted);
    font-family: var(--font-family);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: color var(--transition-fast);
    text-align: center;
    white-space: nowrap;
}

.sidebar-tab:hover:not(.active) {
    color: var(--text-light);
}

.sidebar-tab.active {
    color: var(--bg-dark);
    font-weight: 700;
}

.sidebar-tab-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}

.sidebar-tab-panel.hidden {
    display: none;
}

#tab-panel-actions,
#tab-panel-layers,
#tab-panel-annotate {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.actions-tools-scroll-region {
    flex: 1;
    min-height: 0;
}

.sidebar-prompt-bar.is-readonly .input-field {
    color: var(--text-muted);
    cursor: default;
    pointer-events: none;
    opacity: 0.65;
}

.sidebar-prompt-bar {
    margin-top: auto;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    border-top: 1px solid var(--surface-border);
    padding-top: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    padding-left: 0;
    padding-right: 0;
    transition:
        border-color var(--transition-normal),
        box-shadow var(--transition-normal);
}

.sidebar-prompt-bar .panel-title {
    margin: 0;
}

.sidebar-prompt-subtitle {
    margin: 0;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-light);
    line-height: 1.35;
}

.sidebar-prompt-bar .input-field {
    background: #0a0a0a;
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    padding: 12px;
    font-size: var(--font-size-sm);
    resize: none;
    transition: border-color var(--transition-fast);
}

.sidebar-prompt-bar.is-layer-target {
    border-top-color: rgba(59, 130, 246, 0.45);
    box-shadow: inset 0 1px 0 rgba(59, 130, 246, 0.15);
}

.sidebar-prompt-bar.is-layer-target .panel-title {
    color: #93c5fd;
}

.sidebar-prompt-bar.is-layer-target .sidebar-prompt-subtitle {
    color: #e0f2fe;
}

.sidebar-prompt-bar.is-layer-target .input-field {
    border-color: rgba(59, 130, 246, 0.35);
}

.sidebar-prompt-bar.is-layer-target .input-field:focus {
    border-color: rgba(59, 130, 246, 0.65);
    outline: none;
}

.sidebar-prompt-apply-wrap {
    display: grid;
    grid-template-rows: 0fr;
    opacity: 0;
    transform: translateY(10px);
    overflow: hidden;
    pointer-events: none;
    transition:
        grid-template-rows 0.32s cubic-bezier(0.4, 0, 0.2, 1),
        opacity 0.24s ease,
        transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-prompt-bar.is-apply-visible .sidebar-prompt-apply-wrap {
    grid-template-rows: 1fr;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    margin-top: var(--spacing-sm);
}

.sidebar-prompt-apply-wrap > .sidebar-prompt-apply,
.sidebar-prompt-apply-wrap > .btn-apply {
    min-height: 0;
    overflow: hidden;
    margin-top: 0;
}

.annotate-footer.is-apply-visible .sidebar-prompt-apply-wrap {
    grid-template-rows: 1fr;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

@media (prefers-reduced-motion: reduce) {
    .sidebar-prompt-apply-wrap {
        transition: none;
    }

    .sidebar-prompt-bar.is-apply-visible .sidebar-prompt-apply-wrap,
    .annotate-footer.is-apply-visible .sidebar-prompt-apply-wrap {
        transform: none;
    }
}

.panel-title {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin: 0 0 var(--spacing-xs) 0;
}

.tools-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.tool-item {
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.tool-item.active {
    background: #1a1a1a;
    padding-bottom: 8px;
}

.tool-item.layer-item-wrap.active {
    padding-bottom: 0;
}

.tool-item.layer-item-wrap.is-layer-target {
    background: rgba(59, 130, 246, 0.08);
    box-shadow: inset 0 0 0 1px rgba(59, 130, 246, 0.32);
}

.tool-item.layer-item-wrap.is-layer-target .tool-icon {
    background: rgba(59, 130, 246, 0.2);
    color: #93c5fd;
    border-color: rgba(59, 130, 246, 0.45);
}

.tool-item.layer-item-wrap.is-layer-target .tool-info h4 {
    color: #e0f2fe;
}

.tool-item.layer-item-wrap.is-layer-target .layer-item-desc {
    color: #93c5fd;
}

.tool-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-light);
    text-align: left;
    cursor: pointer;
    padding: 10px 12px;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    width: 100%;
}

.tool-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.03);
}

.tool-item.active .tool-btn {
    background: transparent;
}

.tool-icon {
    width: 44px;
    height: 44px;
    background: #0a0a0a;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--text-light);
    transition: all var(--transition-fast);
}

.tool-icon .spectrum-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    color: inherit;
}

.tool-icon .spectrum-icon svg,
.btn .spectrum-icon svg {
    display: block;
    width: 20px;
    height: 20px;
}

.tool-item.active .tool-icon {
    background: var(--text-light);
    color: var(--bg-dark);
    border-color: transparent;
}

.tool-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.tool-info h4 {
    margin: 0 0 2px 0;
    font-size: var(--font-size-base);
    font-weight: 500;
}

.tool-info p {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    line-height: 1.4;
}

.tool-expanded {
    padding: 0 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 4px;
}

.btn-dashed {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: #0a0a0a;
    border: 1px dashed rgba(255, 255, 255, 0.2);
    color: var(--text-light);
    width: 100%;
    padding: 14px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.btn-dashed:hover {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-apply {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #333333;
    color: var(--text-light);
    border: none;
    width: 100%;
    padding: 10px;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.btn-apply:hover:not(:disabled) {
    background: #444444;
}

.btn-apply:disabled {
    background: #222222;
    color: #666666;
    cursor: not-allowed;
}

.tool-expanded .input-field {
    background: #0a0a0a;
    border-radius: var(--radius-md);
    padding: 12px;
    font-size: var(--font-size-sm);
    resize: none;
}

.tool-expanded.sidebar-prompt-bar,
.sidebar-prompt-bar {
    padding-top: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    padding-left: 0;
    padding-right: 0;
}

.tool-expanded--color-grade {
    gap: 8px;
}

.color-grade-controls {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.color-grade-analyzing {
    position: relative;
    min-height: 140px;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: rgba(10, 14, 24, 0.45);
    border: 1px solid var(--surface-border);
}

.color-grade-analyzing.hidden {
    display: none;
}

.color-grade-analyzing-stage {
    position: relative;
    min-height: 140px;
    width: 100%;
}

.color-grade-fx-canvas {
    display: block;
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.color-grade-analyzing-text {
    position: absolute;
    inset: 0;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-light);
    text-align: center;
    pointer-events: none;
    text-shadow:
        0 0 20px rgba(0, 0, 0, 0.9),
        0 1px 3px rgba(0, 0, 0, 0.8);
}

.color-grade-controls.hidden {
    display: none;
}

.color-grade-controls .panel-title {
    margin: 0;
}

.grade-style-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    width: 100%;
    margin: 0;
}

.grade-style-chip {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    background: #0a0a0a;
    color: var(--text-muted);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 500;
    line-height: 1.3;
    text-align: left;
    cursor: pointer;
    transition:
        background var(--transition-fast),
        color var(--transition-fast),
        border-color var(--transition-fast);
}

.grade-style-chip:hover:not(:disabled):not(.active) {
    color: var(--text-light);
    border-color: rgba(255, 255, 255, 0.2);
}

.grade-style-chip.active {
    background: var(--text-light);
    color: var(--bg-dark);
    border-color: transparent;
}

.grade-style-chip.active:hover:not(:disabled) {
    background: #e5e5e5;
    color: var(--bg-dark);
    border-color: transparent;
}

.grade-style-chip:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.grade-strength {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin: 0;
}

.tool-expanded--color-grade .btn-apply {
    margin-top: 0;
}

.grade-strength-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-light);
}

.grade-strength-label span {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}

.grade-intensity-slider {
    width: 100%;
    height: 4px;
    margin: 0;
    accent-color: var(--text-light);
    cursor: pointer;
}

.sidebar-footer {
    padding: 0 var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.process-overlay {
    position: absolute;
    inset: 0;
    z-index: 10;
    overflow: hidden;
    pointer-events: all;
}

.process-fx-canvas {
    display: block;
    width: 100%;
    height: 100%;
}