/* =========================================================
   SPACING BUILDER — controls panel
   assets/css/pages/spacing-builder/spacing-builder.css
   =========================================================
   Sidebar controls only. Workspace chrome (hero, sidebar shell,
   health bar, tabs, drawer) comes from components/tool-shell.css.
   Preview content styling lives in preview/*.css.

   Class prefix: sp-   ·   uses existing website CSS variables only.
   ========================================================= */


/* =========================================================
   PANEL SHELL
   ========================================================= */

.sp-controls-panel {
    background: var(--surface-primary);
    border: 1px solid var(--border-primary);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

/* Panel header — unified in components/tool-shell.css (icon + heading). */


/* =========================================================
   SEGMENTED PILLS  (Base Grid · Range · Ratio · Naming · Unit)
   ========================================================= */

.sp-seg {
    display: flex;
    width: 100%;
    gap: 0.2rem;
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: 0.6rem;
    padding: 0.2rem;
    box-sizing: border-box;
}

.sp-seg-btn {
    flex: 1;
    padding: 0.4rem 0.5rem;
    border: none;
    background: transparent;
    border-radius: 0.45rem;
    font-family: var(--font-primary);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.sp-seg-btn:hover { color: var(--text-primary); }

.sp-seg-btn--active {
    background: var(--surface-primary);
    color: var(--text-primary);
    font-weight: var(--font-semi-bold);
    box-shadow: var(--shadow-sm);
}


/* Numeric inputs (custom grid / custom ratio) */
.sp-custom-grid,
.sp-custom-ratio {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-2);
}

.sp-num-input {
    flex: 1;
    min-width: 0;
    padding: 0.45rem 0.6rem;
    border: 1px solid var(--border-primary);
    border-radius: 0.5rem;
    background: var(--surface-primary);
    font: inherit;
    font-size: var(--text-sm);
    color: var(--text-primary);
}

.sp-num-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.sp-num-input-label {
    font-size: var(--text-xs);
    color: var(--text-muted);
}


/* =========================================================
   SCALE METHOD — selectable cards with bar visual
   ========================================================= */

.sp-method-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.sp-method-card {
    display: grid;
    grid-template-columns: 48px 1fr;
    grid-template-rows: auto auto;
    column-gap: var(--space-3);
    row-gap: 0.1rem;
    align-items: center;
    padding: 0.6rem 0.75rem;
    background: var(--surface-primary);
    border: 1.5px solid var(--border-primary);
    border-radius: 0.75rem;
    cursor: pointer;
    text-align: left;
    font-family: var(--font-primary);
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

.sp-method-card:hover,
.sp-method-card--active {
    border-color: var(--color-primary);
    background: var(--color-primary-soft);
}

.sp-method-card__viz {
    grid-row: 1 / 3;
    align-self: center;
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 30px;
}

.sp-viz-bar {
    width: 5px;
    background: var(--color-primary);
    border-radius: 2px;
    opacity: 0.5;
    transition: opacity var(--transition-fast);
}

.sp-method-card--active .sp-viz-bar { opacity: 1; }

.sp-method-card__label {
    grid-column: 2;
    font-size: 0.8125rem;
    font-weight: var(--font-semi-bold);
    color: var(--text-primary);
    line-height: 1.2;
}

.sp-method-card__desc {
    grid-column: 2;
    font-size: var(--text-xs);
    color: var(--text-muted);
    line-height: 1.3;
}


/* ── Modular ratio sub-control ── */
.sp-ratio {
    margin-top: var(--space-3);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.sp-ratio-label {
    font-size: 0.6875rem;
    font-weight: var(--font-bold);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-secondary);
}


/* =========================================================
   DENSITY — 2x2 cards with gap visual
   ========================================================= */

.sp-density-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2);
}

.sp-density-card {
    display: grid;
    grid-template-columns: 22px 1fr;
    grid-template-rows: auto auto;
    column-gap: var(--space-2);
    row-gap: 0.1rem;
    align-items: center;
    position: relative;
    padding: 0.5rem 0.6rem;
    background: var(--surface-primary);
    border: 1.5px solid var(--border-primary);
    border-radius: 0.7rem;
    cursor: pointer;
    text-align: left;
    font-family: var(--font-primary);
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

.sp-density-card:hover:not(.sp-density-card--disabled),
.sp-density-card--active {
    border-color: var(--color-primary);
    background: var(--color-primary-soft);
}

.sp-density-card--disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.sp-density-card__viz {
    grid-row: 1 / 3;
    align-self: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.sp-viz-line {
    display: block;
    width: 18px;
    height: 2.5px;
    background: var(--color-primary);
    border-radius: 2px;
    opacity: 0.5;
    transition: opacity var(--transition-fast);
}

.sp-density-card--active .sp-viz-line { opacity: 1; }

.sp-density-card__label {
    grid-column: 2;
    font-size: 0.78rem;
    font-weight: var(--font-semi-bold);
    color: var(--text-primary);
    line-height: 1.2;
}

.sp-density-card__desc {
    grid-column: 2;
    font-size: 0.65rem;
    color: var(--text-muted);
    line-height: 1.25;
}

.sp-card-badge {
    position: absolute;
    top: 5px;
    right: 5px;
    padding: 0.05rem 0.3rem;
    border-radius: 9999px;
    background: var(--surface-secondary);
    color: var(--text-muted);
    font-size: 0.55rem;
    font-weight: var(--font-semi-bold);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}


/* =========================================================
   ADVANCED — collapsible
   ========================================================= */

.sp-advanced-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    text-align: left;
}

.sp-advanced-label {
    font-size: 0.75rem;
    font-weight: var(--font-bold);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.sp-advanced-chevron {
    font-size: 1rem;
    line-height: 1;
    color: var(--text-muted);
    display: inline-block;
    transform: rotate(90deg);
    transition: transform var(--transition-fast);
}

.sp-advanced--open .sp-advanced-chevron { transform: rotate(-90deg); }

.sp-advanced-body {
    display: none;
    flex-direction: column;
    gap: var(--space-3);
    padding-top: var(--space-3);
}

.sp-advanced--open .sp-advanced-body { display: flex; }

.sp-adv-row {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.sp-adv-row-label {
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
}


/* =========================================================
   DEVICE TOGGLE — mobile frame for the preview area
   (the app adds .sp-preview-root--mobile on the preview root)
   ========================================================= */

.sp-preview-root--mobile .tool-preview-panel--active {
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
}


/* =========================================================
   RESPONSIVE — flatten the panel inside the mobile drawer
   ========================================================= */

@media (max-width: 768px) {
    .sp-controls-panel {
        border: none;
        border-radius: 0;
        box-shadow: none;
        /* Keep full content height inside the flex-column drawer so it scrolls.
           (overflow:hidden would otherwise let flex shrink + clip the panel.) */
        flex-shrink: 0;
    }

    /* Breathing room so the last control clears the bottom of the drawer. */
    #sp-sidebar {
        padding-bottom: var(--space-6);
    }
}