/* Platform 20 — Mobile Price Intelligence (extends device page, no layout redesign) */
.mpi-section { scroll-margin-top: var(--md-scroll-offset, 6.5rem); }
.mpi-header { flex-wrap: wrap; gap: 0.35rem; }
.mpi-engine-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--md-card-gap, 0.375rem); margin-bottom: 0.75rem; }
@media (min-width: 640px) { .mpi-engine-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1024px) { .mpi-engine-grid { grid-template-columns: repeat(auto-fill, minmax(6.5rem, 1fr)); } }
.mpi-card { padding: var(--md-card-pad-sm, 0.75rem) 0.625rem !important; box-shadow: var(--md-shadow-card, 0 2px 8px rgba(15, 23, 42, 0.05)); transition: box-shadow 0.2s ease, transform 0.2s ease; }
.mpi-card:hover { box-shadow: var(--md-shadow-card-hover, 0 6px 20px rgba(15, 23, 42, 0.09)); transform: translateY(-1px); }
.mpi-card .md-pricing-value { font-size: 0.9375rem; line-height: 1.2; }
.mpi-card .md-pricing-label { text-transform: none; letter-spacing: 0; }
.mpi-savings .md-pricing-value { color: #16a34a; }
.mpi-trend-down .md-pricing-value { color: #16a34a; }
.mpi-trend-up .md-pricing-value { color: #dc2626; }

.mpi-analytics { margin: 0.75rem 0; padding: var(--md-card-pad, 0.875rem); background: var(--md-surface-2, #f8fafc); border-radius: var(--md-radius-sm, 10px); border: 1px solid var(--md-border, #e2e8f0); }
.mpi-analytics h3 { font-size: 0.875rem; margin: 0 0 0.5rem; font-weight: 700; }
.mpi-analytics-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--md-card-gap, 0.375rem); }
@media (min-width: 640px) { .mpi-analytics-grid { grid-template-columns: repeat(auto-fill, minmax(7rem, 1fr)); } }
.mpi-analytics-card { background: var(--md-surface, #fff); border: 1px solid var(--md-border); border-radius: var(--md-radius-sm, 10px); padding: var(--md-card-pad-sm, 0.75rem) 0.625rem; box-shadow: var(--md-shadow-card, 0 2px 8px rgba(15, 23, 42, 0.05)); transition: box-shadow 0.2s ease; }
.mpi-analytics-card:hover { box-shadow: var(--md-shadow-card-hover, 0 6px 20px rgba(15, 23, 42, 0.09)); }
.mpi-analytics-card span { display: block; font-size: 0.625rem; color: var(--md-muted); font-weight: 600; margin-bottom: 0.1rem; }
.mpi-analytics-card strong { font-size: 0.8125rem; line-height: 1.25; }
.mpi-analytics-card small { display: block; font-size: 0.6875rem; color: var(--md-muted); margin-top: 0.1rem; }
.mpi-ai-rec { margin: 0.5rem 0 0; font-size: 0.8125rem; color: var(--md-text); line-height: 1.45; }

.mpi-retailers { margin: 0.75rem 0; }
.mpi-retailers h3 { font-size: 0.875rem; margin: 0 0 0.5rem; }
.mpi-retailer-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.mpi-retailer-table { width: 100%; border-collapse: collapse; font-size: 0.8125rem; min-width: 32rem; }
.mpi-retailer-table th, .mpi-retailer-table td { padding: 0.5rem 0.65rem; border-bottom: 1px solid var(--md-border); text-align: left; }
.mpi-retailer-table th { font-size: 0.6875rem; text-transform: uppercase; color: var(--md-muted); }
.mpi-store-name { display: flex; align-items: center; gap: 0.35rem; flex-wrap: wrap; }
.mpi-store-logo { border-radius: 4px; object-fit: contain; }
.mpi-store-region { display: block; color: var(--md-muted); font-size: 0.6875rem; }
.mpi-badge { font-size: 0.625rem; padding: 0.1rem 0.35rem; border-radius: 3px; font-weight: 700; }
.mpi-badge.verified { background: #dcfce7; color: #166534; }
.mpi-badge.official { background: #dbeafe; color: #1e40af; }
.mpi-buy-link { font-weight: 600; color: var(--md-primary, #2563eb); text-decoration: none; }
.mpi-stock { font-size: 0.75rem; font-weight: 600; }

.mpi-variants { margin: 0.75rem 0; }
.mpi-variants h3 { font-size: 0.875rem; margin: 0 0 0.5rem; }
.mpi-variant-group { margin-bottom: 0.5rem; }
.mpi-variant-group h4 { font-size: 0.75rem; margin: 0 0 0.25rem; color: var(--md-muted); font-weight: 600; }
.mpi-variant-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--md-card-gap-sm, 0.25rem); }
.mpi-variant-list li { display: flex; gap: 0.35rem; align-items: center; padding: 0.3rem 0.5rem; background: var(--md-surface); border: 1px solid var(--md-border); border-radius: var(--md-radius-sm, 10px); font-size: 0.75rem; box-shadow: var(--md-shadow-card, 0 2px 8px rgba(15, 23, 42, 0.05)); }

.mpi-chart-block { margin: 0.75rem 0; }
.mpi-chart-controls { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.35rem; margin-bottom: 0.35rem; }
.mpi-chart-controls h3 { margin: 0; font-size: 0.875rem; }
.mpi-period-tabs, .mpi-granularity { display: flex; flex-wrap: wrap; gap: 0.25rem; }
.mpi-tab, .mpi-tab-gran { font-size: 0.75rem; padding: 0.3rem 0.55rem; border: 1px solid var(--md-border); background: var(--md-surface); border-radius: 6px; cursor: pointer; color: var(--md-text); }
.mpi-tab.active, .mpi-tab-gran.active { background: var(--md-primary, #2563eb); color: #fff; border-color: var(--md-primary); }
.mpi-tab:focus-visible, .mpi-tab-gran:focus-visible, .mpi-alert-btn:focus-visible { outline: 2px solid var(--md-primary); outline-offset: 2px; }
.mpi-chart-meta { display: flex; flex-wrap: wrap; gap: 0.75rem; font-size: 0.75rem; color: var(--md-muted); margin-bottom: 0.5rem; }
.mpi-canvas { width: 100%; max-height: 220px; display: block; }
.mpi-chart-empty { font-size: 0.875rem; color: var(--md-muted); margin: 0.5rem 0 0; }

.mpi-alert-form { margin-top: 0.75rem; padding-top: 0.75rem; border-top: 1px solid var(--md-border); }
.mpi-alert-form h3 { font-size: 0.875rem; margin: 0 0 0.5rem; }
.mpi-alert-row { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.mpi-alert-row input, .mpi-alert-row select { flex: 1 1 8rem; min-width: 0; padding: 0.45rem 0.6rem; border: 1px solid var(--md-border); border-radius: 6px; font-size: 0.8125rem; background: var(--md-surface); color: var(--md-text); }
.mpi-alert-btn { padding: 0.45rem 0.85rem; background: var(--md-primary); color: #fff; border: none; border-radius: 6px; font-size: 0.8125rem; font-weight: 600; cursor: pointer; white-space: nowrap; }
.mpi-alert-msg { font-size: 0.8125rem; margin: 0.35rem 0 0; min-height: 1.25rem; }
.mpi-alert-msg.success { color: #16a34a; }
.mpi-alert-msg.error { color: #dc2626; }

/* Compact buy box internal layout */
.mpi-buybox { padding: 0.55rem 0.7rem !important; }
.mpi-buybox-top { margin-bottom: 0.25rem !important; }
.mpi-buybox-mid { margin-bottom: 0.3rem !important; }
.mpi-buybox-prices { display: flex; flex-direction: column; gap: 0.1rem; }
.mpi-buybox-secondary { display: flex; flex-wrap: wrap; gap: 0.35rem 0.5rem; align-items: center; }
.mpi-buybox-low { font-size: 0.6875rem; color: var(--md-muted); }
.mpi-buybox-low strong { color: var(--md-text); }
.mpi-buybox-save { font-size: 0.6875rem !important; display: inline !important; }
.mpi-buybox-store { margin-top: 0; font-size: 0.6875rem; color: var(--md-muted); }
.mpi-buybox-store-name { font-weight: 600; color: var(--md-text); }
.mpi-buybox-actions { padding-top: 0.4rem !important; gap: 0.3rem !important; margin-top: 0.1rem !important; }
.mpi-buybox .md-purchase-current { font-size: 1.25rem !important; }
.mpi-buybox .md-purchase-action { font-size: 0.625rem; padding: 0.28rem 0.3rem; min-height: 0 !important; }
.mpi-buybox .md-purchase-reviews { margin-top: 0.3rem !important; padding: 0.32rem 0.5rem !important; font-size: 0.6875rem !important; min-height: 0 !important; }
@media (max-width: 420px) {
    .mpi-buybox-actions { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .mpi-buybox .md-purchase-action span { font-size: 0.625rem; }
}

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.md-dark .mpi-analytics { background: #1e293b; }
.md-dark .mpi-analytics-card, .md-dark .mpi-variant-list li { background: #0f172a; }
.md-dark .mpi-badge.verified { background: #14532d; color: #bbf7d0; }
.md-dark .mpi-badge.official { background: #1e3a8a; color: #bfdbfe; }

@media (prefers-reduced-motion: reduce) {
    .mpi-card, .mpi-analytics-card { transition: none; }
    .mpi-card:hover { transform: none; }
}

@media (max-width: 480px) {
    .mpi-alert-row input, .mpi-alert-row select { flex: 1 1 100%; }
    .mpi-buybox-actions { justify-content: space-between; }
}

@media (min-width: 1200px) {
    .mpi-retailer-table { font-size: 0.875rem; }
}