/* ============================================================
   zb-comparison.css — Visual comparison canvas + builder
   ============================================================ */

.zb-comparison-page { padding-block: 1.5rem 3rem; }
.zb-comparison-page__head { margin-bottom: 1.5rem; }
.zb-comparison-page__title { margin: 0; }
.zb-comparison-page__content { margin-top: 2rem; max-width: 760px; }
.zb-comparison-page__actions { margin-top: 2rem; }

/* --- Canvas --- */
.zb-comparison-canvas {
    background: var(--c-bg-subtle);
    border: 1px solid var(--c-border);
    border-radius: 16px;
    padding: clamp(1rem, 3vw, 2rem);
    overflow: hidden;
}
.zb-comparison-canvas__container {
    background: var(--c-surface);
    border-radius: 12px;
    border: 1px solid var(--c-border);
    padding: 1rem;
    min-height: 300px;
    position: relative;
    overflow: auto;
}
.zb-comparison-canvas__svg { display: block; width: 100%; height: auto; min-height: 280px; }

/* Bottom-aligned bar chart: black bars for reference objects, the
   comparison's own target measurement highlighted in brand yellow. */
.zb-comparison-canvas__baseline { stroke: var(--c-border); stroke-width: 2; }
.zb-comparison-canvas__bar { fill: var(--c-primary); transition: opacity 0.15s ease; }
.zb-comparison-canvas__bar:hover { opacity: 0.85; }
.zb-comparison-canvas__bar--target { fill: var(--c-accent); }
.zb-comparison-canvas__bar-value { fill: var(--c-text); font-size: 11px; font-weight: 700; font-family: var(--zb-font-body, sans-serif); }
.zb-comparison-canvas__bar-label { fill: var(--c-text); font-size: 11px; font-weight: 600; font-family: var(--zb-font-body, sans-serif); }
.zb-comparison-canvas__bar-multiplier { fill: var(--c-text-muted); font-size: 10px; font-family: var(--zb-font-mono, monospace); }
.zb-comparison-canvas__bar-multiplier--target { fill: var(--c-text); font-weight: 700; font-family: var(--zb-font-body, sans-serif); }

.zb-comparison-canvas__legend {
    margin-top: 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.5rem;
}
.zb-comparison-legend-item {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: 8px;
    padding: 0.6em 0.8em;
    display: flex;
    flex-direction: column;
    gap: 0.2em;
}
.zb-comparison-legend-item__title { font-size: 0.875rem; font-weight: 600; color: var(--c-text); text-decoration: none; }
.zb-comparison-legend-item__title:hover { color: var(--c-primary); text-decoration: none; }
.zb-comparison-legend-item__dims { font-size: 0.75rem; color: var(--c-text-muted); font-family: var(--zb-font-mono, monospace); }
.zb-comparison-legend-item__multiplier { font-size: 0.75rem; font-weight: 700; color: var(--c-primary); }

.zb-comparison-canvas__callout {
    margin-top: 1rem;
    padding: 0.75em 1em;
    background: var(--c-surface);
    border: 1px solid var(--c-accent);
    border-left-width: 4px;
    border-radius: 8px;
    font-size: 0.9rem;
}
.zb-comparison-canvas__quick-compare {
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: var(--c-text-muted);
    line-height: 1.6;
}

.zb-comparison-page__related { margin-top: 2.5rem; }
.zb-comparison-page__related-title { margin-bottom: 1rem; }

/* --- Builder --- */
.zb-builder { padding-block: 1rem 3rem; }
.zb-builder__layout { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 1.5rem; }
@media (max-width: 900px) { .zb-builder__layout { grid-template-columns: 1fr; } }

.zb-builder__picker {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: 12px;
    padding: 1rem 1.2rem;
}
.zb-builder__search { margin-bottom: 1rem; }
.zb-builder__search input {
    width: 100%;
    padding: 0.6em 0.85em;
    border: 1px solid var(--c-border);
    border-radius: 8px;
    font-size: 0.95rem;
}
.zb-builder__categories { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }
.zb-builder__cat-btn {
    padding: 0.3em 0.75em;
    border: 1px solid var(--c-border);
    border-radius: 999px;
    font-size: 0.8rem;
    cursor: pointer;
    background: var(--c-surface);
    color: var(--c-text-muted);
    transition: all 0.15s ease;
}
.zb-builder__cat-btn:hover, .zb-builder__cat-btn.is-active { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.zb-builder__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 0.5rem;
    max-height: 480px;
    overflow-y: auto;
}
.zb-builder__item {
    border: 1px solid var(--c-border);
    border-radius: 8px;
    padding: 0.5em;
    cursor: pointer;
    background: var(--c-surface);
    transition: all 0.15s ease;
    text-align: center;
}
.zb-builder__item:hover { border-color: var(--c-primary); transform: translateY(-1px); }
.zb-builder__item.is-selected { border-color: var(--c-primary); background: rgba(79, 70, 229, 0.06); }
.zb-builder__item-title { font-size: 0.75rem; font-weight: 500; margin: 0.3em 0 0; line-height: 1.2; }
.zb-builder__item-dims { font-size: 0.7rem; color: var(--c-text-muted); font-family: var(--zb-font-mono, monospace); }

.zb-builder__sidebar {
    background: var(--c-bg-subtle);
    border: 1px solid var(--c-border);
    border-radius: 12px;
    padding: 1.2rem;
    height: fit-content;
    position: sticky;
    top: 80px;
}
.zb-builder__selected-list { list-style: none; padding: 0; margin: 0 0 1rem; display: flex; flex-direction: column; gap: 0.4rem; }
.zb-builder__selected-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5em 0.7em;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: 6px;
    font-size: 0.875rem;
}
.zb-builder__remove { color: #b91c1c; cursor: pointer; font-size: 1rem; line-height: 1; padding: 0 0.2em; }
.zb-builder__actions { display: flex; flex-direction: column; gap: 0.5rem; }
.zb-builder__save-input { width: 100%; padding: 0.55em 0.8em; border: 1px solid var(--c-border); border-radius: 8px; font-size: 0.9rem; }
.zb-builder__empty { text-align: center; color: var(--c-text-muted); padding: 1rem; font-size: 0.875rem; }
.zb-builder__login-notice { background: #fef3c7; color: #92400e; padding: 0.85em 1em; border-radius: 8px; font-size: 0.875rem; }

.zb-builder__preview {
    margin-top: 1.5rem;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: 12px;
    padding: 1rem;
    min-height: 200px;
}