body {
    background: #f5f5f5;
}

.fb-panel {
    background: #ffffff;
    border: 1px solid #dddddd;
    border-radius: 0.5rem;
    padding: 1rem;
}

.fb-grid-ruler {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    color: #777777;
    font-size: 0.75rem;
    text-align: center;
}

.fb-grid-ruler span {
    background: #f1f1f1;
    border: 1px solid #dddddd;
    border-radius: 0.25rem;
    padding: 0.15rem 0;
}

.fb-canvas {
    min-height: 420px;
    border: 2px dashed #cccccc;
    border-radius: 0.5rem;
    padding: 1rem;
    background:
        repeating-linear-gradient(
            to right,
            rgba(13, 110, 253, 0.07) 0,
            rgba(13, 110, 253, 0.07) calc((100% - 5.5rem) / 12),
            transparent calc((100% - 5.5rem) / 12),
            transparent calc(((100% - 5.5rem) / 12) + 0.5rem)
        ),
        #fafafa;
}

.fb-canvas-row {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    min-height: 3rem;
}

.fb-cell {
    min-width: 0;
}

.fb-item {
    border: 1px solid #dddddd;
    border-radius: 0.5rem;
    padding: 0.75rem;
    background: #ffffff;
    cursor: pointer;
    position: relative;
}

.fb-item.fb-selected {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.15rem rgba(13, 110, 253, 0.15);
}

.fb-item-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin-top: 0.5rem;
}

.fb-item-toolbar button {
    padding: 0.1rem 0.35rem;
    font-size: 0.75rem;
}

.fb-item-meta {
    font-size: 0.75rem;
    color: #666666;
    margin-top: 0.25rem;
}

.fb-component-shell {
    min-height: 100%;
    display: flex;
}

.fb-cell-align-top-left {
    align-items: flex-start;
    justify-content: flex-start;
}

.fb-cell-align-top-centre {
    align-items: flex-start;
    justify-content: center;
}

.fb-cell-align-top-right {
    align-items: flex-start;
    justify-content: flex-end;
}

.fb-cell-align-mid-left {
    align-items: center;
    justify-content: flex-start;
}

.fb-cell-align-mid-centre {
    align-items: center;
    justify-content: center;
}

.fb-cell-align-mid-right {
    align-items: center;
    justify-content: flex-end;
}

.fb-cell-align-bot-left {
    align-items: flex-end;
    justify-content: flex-start;
}

.fb-cell-align-bot-centre {
    align-items: flex-end;
    justify-content: center;
}

.fb-cell-align-bot-right {
    align-items: flex-end;
    justify-content: flex-end;
}

.fb-component-inner {
    width: 100%;
}

.fb-component-inner.fb-narrow {
    max-width: 18rem;
}

.fb-component-inner.fb-medium {
    max-width: 26rem;
}

.fb-component-inner.fb-wide {
    max-width: 100%;
}

.fb-empty {
    color: #777777;
}


/* v0.3 compact canvas controls */
.fb-item {
    padding: 0.55rem;
}

.fb-item-toolbar {
    gap: 0.15rem;
    margin-top: 0.35rem;
}

.fb-item-toolbar button {
    width: 1.35rem;
    height: 1.35rem;
    min-width: 1.35rem;
    padding: 0;
    font-size: 0.68rem;
    line-height: 1;
    border-radius: 0.2rem;
}

.fb-item-toolbar button[data-action="shrink"],
.fb-item-toolbar button[data-action="grow"] {
    width: 2rem;
    min-width: 2rem;
    font-size: 0.65rem;
}

.fb-item-toolbar button[data-action="delete"] {
    width: 1.35rem;
    min-width: 1.35rem;
}

.fb-item-meta {
    font-size: 0.68rem;
    margin-top: 0.2rem;
}


/* v0.4 direct manipulation canvas */
.fb-canvas {
    background: #ffffff;
}

.fb-canvas.fb-dragging {
    background:
        repeating-linear-gradient(
            to right,
            rgba(13, 110, 253, 0.08) 0,
            rgba(13, 110, 253, 0.08) calc((100% - 5.5rem) / 12),
            transparent calc((100% - 5.5rem) / 12),
            transparent calc(((100% - 5.5rem) / 12) + 0.5rem)
        ),
        #ffffff;
}

.fb-canvas.fb-blocked {
    border-color: #dc3545;
}

.fb-canvas-row {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    min-height: 3rem;
}

.fb-cell {
    min-width: 0;
}

.fb-item {
    position: relative;
    padding: 0.35rem;
    border: 1px solid transparent;
    border-radius: 0.4rem;
    background: transparent;
    cursor: move;
}

.fb-item:hover {
    border-color: #d6d6d6;
}

.fb-item.fb-selected {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.12rem rgba(13, 110, 253, 0.12);
}

.fb-draft-content {
    pointer-events: none;
}

.fb-delete {
    display: none;
    position: absolute;
    top: -0.45rem;
    right: -0.45rem;
    z-index: 3;
    width: 1.1rem;
    height: 1.1rem;
    border: 1px solid #dc3545;
    border-radius: 50%;
    background: #ffffff;
    color: #dc3545;
    font-size: 0.78rem;
    line-height: 0.95rem;
    padding: 0;
}

.fb-item.fb-selected .fb-delete {
    display: block;
}

.fb-resize-handle {
    display: none;
    position: absolute;
    top: 0.25rem;
    right: -0.25rem;
    width: 0.45rem;
    height: calc(100% - 0.5rem);
    border-radius: 0.3rem;
    background: rgba(13, 110, 253, 0.25);
    cursor: ew-resize;
}

.fb-item.fb-selected .fb-resize-handle {
    display: block;
}

.fb-item-meta {
    display: none;
}

.fb-canvas.fb-verbose .fb-item-meta {
    display: block;
    font-size: 0.68rem;
    color: #666666;
    margin-top: 0.2rem;
}

.fb-component-shell {
    min-height: 100%;
    display: flex;
}

.fb-cell-align-top-left {
    align-items: flex-start;
    justify-content: flex-start;
}

.fb-cell-align-top-centre {
    align-items: flex-start;
    justify-content: center;
}

.fb-cell-align-top-right {
    align-items: flex-start;
    justify-content: flex-end;
}

.fb-cell-align-mid-left {
    align-items: center;
    justify-content: flex-start;
}

.fb-cell-align-mid-centre {
    align-items: center;
    justify-content: center;
}

.fb-cell-align-mid-right {
    align-items: center;
    justify-content: flex-end;
}

.fb-cell-align-bot-left {
    align-items: flex-end;
    justify-content: flex-start;
}

.fb-cell-align-bot-centre {
    align-items: flex-end;
    justify-content: center;
}

.fb-cell-align-bot-right {
    align-items: flex-end;
    justify-content: flex-end;
}

.fb-component-inner {
    width: 100%;
}

.fb-component-inner.fb-narrow {
    max-width: 18rem;
}

.fb-component-inner.fb-medium {
    max-width: 26rem;
}

.fb-component-inner.fb-wide {
    max-width: 100%;
}

.fb-drop-ghost {
    border: 2px dashed #0d6efd;
    border-radius: 0.4rem;
    background: rgba(13, 110, 253, 0.08);
    color: #0d6efd;
    font-size: 0.75rem;
    padding: 0.5rem;
    min-height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}


/* v0.4.6 compact title and canvas Design/Debug mode switch */
.fb-app-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.fb-app-title {
    font-size: 1.05rem;
    line-height: 1.2;
    font-weight: 700;
    white-space: nowrap;
}

.fb-version {
    font-size: 0.68rem;
    font-weight: 600;
    color: #888888;
    margin-left: 0.25rem;
}

.fb-mode-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.68rem;
    color: #666666;
    white-space: nowrap;
}

.fb-switch {
    position: relative;
    display: inline-block;
    width: 2.15rem;
    height: 1.05rem;
}

.fb-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.fb-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: #d8d8d8;
    border-radius: 999px;
    transition: 140ms;
}

.fb-slider::before {
    content: "";
    position: absolute;
    height: 0.78rem;
    width: 0.78rem;
    left: 0.14rem;
    top: 0.135rem;
    background: #ffffff;
    border-radius: 50%;
    transition: 140ms;
    box-shadow: 0 1px 2px rgba(0,0,0,0.25);
}

.fb-switch input:checked + .fb-slider {
    background: #0d6efd;
}

.fb-switch input:checked + .fb-slider::before {
    transform: translateX(1.1rem);
}


/* v0.4.6 canvas-local mode switch refinements */
.fb-app-head {
    min-width: 0;
}

.fb-mode-toggle {
    transform: translateY(0.02rem);
}

.fb-mode-toggle span {
    line-height: 1;
}


/* v0.4.6 palette drag/drop */
[data-add] {
    cursor: grab;
}

[data-add]:active {
    cursor: grabbing;
}

.fb-canvas.fb-palette-drag-over {
    border-color: #0d6efd;
    background:
        repeating-linear-gradient(
            to right,
            rgba(13, 110, 253, 0.07) 0,
            rgba(13, 110, 253, 0.07) calc((100% - 5.5rem) / 12),
            transparent calc((100% - 5.5rem) / 12),
            transparent calc(((100% - 5.5rem) / 12) + 0.5rem)
        ),
        #ffffff;
}


/* v0.4.6 compound components */
legend.form-label {
    float: none;
    width: auto;
    font-size: inherit;
    font-weight: 600;
}


/* v0.4.6 placement refinements */
.fb-canvas.fb-dragging .fb-item.fb-selected {
    opacity: 0.72;
}