.bsg-section {
    --tool-accent: #6366F1;
    --tool-accent-rgb: 99, 102, 241;
    --tool-text-secondary: var(--text-secondary, #334155);
}

/* tool-card has overflow:hidden globally which breaks sticky — override it here */
.bsg-section .tool-card {
    overflow: visible;
}

/* Main layout */
.bsg-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    padding: 1.5rem;
    align-items: start;
}

.bsg-output-col {
    position: sticky;
    top: 1rem;
}

@media (max-width: 820px) {
    .bsg-layout {
        grid-template-columns: 1fr;
    }

    .bsg-output-col {
        position: static;
    }
}

/* Section label */
.bsg-section-label {
    display: block;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--tool-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.65rem;
}

/* Shadows list */
.bsg-shadows-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.65rem;
}

.bsg-shadows-header .bsg-section-label {
    margin-bottom: 0;
}

.bsg-shadows-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.bsg-shadow-card {
    border: 1px solid var(--tool-border);
    border-radius: var(--tool-radius-md);
    padding: 0.875rem;
    background: var(--tool-surface);
}

.bsg-shadow-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.bsg-shadow-card-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--tool-text-secondary);
}

.bsg-shadow-del {
    width: 26px;
    height: 26px;
    border: none;
    background: transparent;
    color: var(--tool-text-muted);
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9375rem;
    transition: color 0.15s;
    padding: 0;
}

.bsg-shadow-del:hover {
    color: #ef4444;
}

/* Slider rows */
.bsg-slider-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.bsg-val-lbl {
    font-size: 0.9375rem;
    font-family: var(--tool-font-mono);
    color: var(--tool-accent);
    font-weight: 600;
    min-width: 44px;
    text-align: right;
}

.bsg-row {
    display: grid;
    grid-template-columns: 70px 1fr 56px;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.bsg-row-label {
    font-size: 0.9375rem;
    color: var(--tool-text-secondary);
}

/* Color + inset row */
.bsg-color-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.bsg-shadow-swatch {
    width: 32px;
    height: 32px;
    border-radius: var(--tool-radius-sm);
    border: 1px solid var(--tool-border);
    padding: 2px;
    cursor: pointer;
    background: none;
    flex-shrink: 0;
}

.bsg-alpha-wrap {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.bsg-alpha-lbl {
    font-size: 0.9375rem;
    color: var(--tool-text-secondary);
    white-space: nowrap;
}

.bsg-inset-wrap {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.bsg-inset-lbl {
    font-size: 0.9375rem;
    color: var(--tool-text-secondary);
}

/* Box props */
.bsg-box-props {
    margin-top: 0.25rem;
}

.bsg-prop-row {
    display: grid;
    grid-template-columns: 100px 1fr;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.6rem;
}

.bsg-prop-label {
    font-size: 0.9375rem;
    color: var(--tool-text-secondary);
}

.bsg-unit {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--tool-text-muted);
    margin-left: 1px;
}

.bsg-prop-val {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.bsg-swatch {
    width: 40px;
    height: 32px;
    border: 1px solid var(--tool-border);
    border-radius: var(--tool-radius-sm);
    padding: 2px;
    cursor: pointer;
    background: none;
}

/* Preview */
.bsg-preview-canvas {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 240px;
    border-radius: var(--tool-radius-md);
    border: 1px solid var(--tool-border);
    margin-bottom: 1rem;
    background: #f3f4f6;
    overflow: hidden;
}

.bsg-preview-box {
    width: 120px;
    height: 120px;
    background: #ffffff;
    border-radius: 8px;
    transition: box-shadow 0.2s, border-radius 0.2s, width 0.2s, height 0.2s;
    cursor: move;
    user-select: none;
    touch-action: none;
}

/* Output */
.bsg-output-ta {
    font-family: var(--tool-font-mono);
    font-size: 1rem;
    min-height: 100px;
}

/* ── Presets strip ───────────────────────────────────────── */
.bsg-presets-wrap {
    margin-bottom: 1.25rem;
}

.bsg-presets-strip {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: thin;
    scrollbar-color: var(--tool-border) transparent;
}

.bsg-presets-strip::-webkit-scrollbar {
    height: 4px;
}

.bsg-presets-strip::-webkit-scrollbar-track {
    background: transparent;
}

.bsg-presets-strip::-webkit-scrollbar-thumb {
    background: rgba(100, 116, 139, 0.3);
    border-radius: 4px;
}

.bsg-preset-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    border: 1.5px solid var(--tool-border);
    border-radius: 99px;
    background: var(--tool-surface);
    color: var(--tool-text-muted);
    font-size: 0.8125rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
    transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.bsg-preset-btn:hover {
    border-color: var(--tool-accent);
    color: var(--tool-accent);
    background: rgba(var(--tool-accent-rgb), 0.05);
}

.bsg-preset-btn.active {
    border-color: var(--tool-accent);
    background: rgba(var(--tool-accent-rgb), 0.1);
    color: var(--tool-accent);
}

/* ── Shadows header actions ──────────────────────────────── */
.bsg-shadows-header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.bsg-reset-btn {
    padding: 4px 10px;
    border: 1px solid var(--tool-border);
    border-radius: var(--tool-radius-sm);
    background: transparent;
    color: var(--tool-text-muted);
    font-size: 0.8125rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s;
}

.bsg-reset-btn:hover {
    color: var(--tool-text-secondary);
    border-color: var(--tool-text-muted);
}

/* ── Shadow card action buttons ──────────────────────────── */
.bsg-card-actions {
    display: flex;
    align-items: center;
    gap: 2px;
}

.bsg-icon-btn {
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    color: var(--tool-text-muted);
    cursor: pointer;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    padding: 0;
    transition: color 0.15s, background 0.15s;
}

.bsg-icon-btn:hover {
    color: var(--tool-text-secondary);
    background: rgba(100, 116, 139, 0.1);
}

.bsg-icon-btn.bsg-del-btn:hover {
    color: #ef4444;
    background: #fef2f2;
}

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

/* ── Hidden shadow layer ─────────────────────────────────── */
.bsg-shadow-hidden {
    opacity: 0.45;
}

/* ── Number inputs ───────────────────────────────────────── */
.bsg-num {
    width: 52px;
    padding: 3px 5px;
    border: 1px solid var(--tool-border);
    border-radius: var(--tool-radius-sm);
    background: #FFFFFF;
    color: var(--tool-text-primary);
    font-size: 0.8125rem;
    font-family: var(--tool-font-mono);
    font-weight: 600;
    text-align: right;
    -moz-appearance: textfield;
}

.bsg-num::-webkit-outer-spin-button,
.bsg-num::-webkit-inner-spin-button {
    -webkit-appearance: none;
}

.bsg-num:focus {
    outline: 2px solid var(--tool-accent);
    outline-offset: 1px;
    border-color: transparent;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 820px) {
    .bsg-presets-strip {
        gap: 0.4rem;
    }

    .bsg-row {
        grid-template-columns: 64px 1fr 52px;
    }

    .bsg-controls {
        min-width: 0;
        overflow-x: hidden;
    }
}