/* Shared mobile-first primitives; no external fonts or UI dependencies. */
:root {
  --accent: #3e6ae1;
  --ink: #171a20;
  --body: #393c41;
  --muted: #5c5e62;
  --surface: #f4f4f4;
  --line: #d0d1d2;
  --radius: 12px;
  font-family: "Universal Sans Text", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: #fff;
  font-synthesis: none;
  -webkit-text-size-adjust: 100%;
}
* { box-sizing: border-box; }
html { scroll-padding-top: 80px; scroll-padding-bottom: calc(90px + env(safe-area-inset-bottom)); }
body { margin: 0; font-size: 14px; line-height: 1.45; }
button, input, select, textarea { font: inherit; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }
button, a, summary, input, select, textarea { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
[hidden] { display: none !important; }
.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; }
h1, h2, h3, h4, p, ul, dl { margin: 0; }
h1, h2 { font-size: 26px; line-height: 1.2; font-weight: 500; }
h3 { font-size: 18px; font-weight: 500; line-height: 1.3; }
h4 { font-size: 16px; font-weight: 500; }
strong { font-weight: 500; }
small, .muted { color: var(--muted); font-size: 12px; }
ul { padding-left: 18px; }
li + li { margin-top: 8px; }
.skip-link { position: fixed; top: -80px; padding: 12px; background: #fff; z-index: 5; }
.skip-link:focus { top: 0; }
.app-header { position: sticky; top: 0; z-index: 4; display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 64px; padding: 10px max(16px, env(safe-area-inset-left)); background: #fff; }
.wordmark { font-size: 17px; font-weight: 500; line-height: 1.1; }
.wordmark span { display: block; margin-top: 4px; font-size: 11px; color: var(--muted); font-weight: 400; }
.desktop-nav { display: none; }
details { min-width: 0; }
summary { cursor: pointer; min-height: 44px; display: flex; align-items: center; gap: 8px; font-weight: 500; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; margin-left: auto; font-size: 18px; font-weight: 400; }
details[open] > summary::after { content: "−"; }
.app-menu > summary { padding: 0 12px; background: var(--surface); border-radius: 4px; min-width: 80px; }
.menu-content { position: absolute; right: 16px; top: 60px; width: min(300px, calc(100vw - 32px)); max-height: calc(100dvh - 76px); overflow-y: auto; padding: 10px; background: var(--surface); border: 1px solid #e4e5e7; border-radius: var(--radius); box-shadow: 0 24px 54px -36px rgba(23, 26, 32, .5); }
.menu-content a { display: block; padding: 11px 12px; border-radius: 7px; font-size: 14px; }
.menu-content a:hover { background: #fff; text-decoration: none; }
.menu-label { padding: 8px 12px 4px; color: var(--muted); font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }
.menu-separator { height: 1px; margin: 8px 12px; background: var(--line); }
.menu-content form { margin: 8px 0 0; }
.menu-content form button { width: 100%; min-height: 42px; justify-content: flex-start; background: #fff; }
.page { max-width: 1120px; margin: 0 auto; padding: 12px 16px calc(100px + env(safe-area-inset-bottom)); }
.page > h2 { margin-bottom: 20px; }
.page > p, .page > form, .page > details, .page > ul { margin-bottom: 20px; }
.page > h3 { margin: 24px 0 12px; }
.bottom-nav { position: fixed; bottom: 0; z-index: 3; width: 100%; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 4px; padding: 8px 12px calc(8px + env(safe-area-inset-bottom)); background: #fff; }
.bottom-nav a { min-height: 48px; display: grid; place-items: center; font-size: 12px; color: var(--muted); border-radius: 4px; }
.bottom-nav a[aria-current="page"] { color: var(--ink); font-weight: 500; background: var(--surface); }
.page-heading, .card-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.page-heading h2 + p, .card-heading h3 + p { margin-top: 5px; color: var(--muted); }
.page-heading > a { white-space: nowrap; }
.bento-grid, .result-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; }
.tile { min-width: 0; padding: 16px; border-radius: var(--radius); background: var(--surface); overflow-wrap: anywhere; }
.tile p + p, .tile h3 + p { margin-top: 8px; }
.tile .card-heading { margin-bottom: 12px; }
.tile .actions { margin-top: 14px; }
.filter-cards { align-items: stretch; }
.filter-card { display: flex; height: 100%; min-height: 252px; flex-direction: column; }
.filter-card .commerce-meta { min-height: 72px; margin-top: 10px; }
.filter-card .actions { width: 100%; margin-top: auto; }
.filter-card .actions > a { width: 100%; }
.commerce-meta { display: grid; gap: 4px; align-content: start; }
.commerce-meta p, .commerce-meta p + p { margin: 0; }
.commerce-meta .shop-local-price { margin: 0; }
.commerce-meta .shop-stock { color: var(--muted); }
.commerce-meta .text-link { min-height: 28px; }
.metric { font-size: 30px; line-height: 1.2; font-weight: 500; font-variant-numeric: tabular-nums; }
.metric-small { font-size: 22px; line-height: 1.3; font-weight: 500; font-variant-numeric: tabular-nums; }
.badge { display: inline-block; border-radius: 4px; padding: 4px 7px; background: #fff; color: var(--muted); font-size: 11px; font-weight: 400; }
.specs { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 12px; }
.specs dt { font-size: 12px; color: var(--muted); margin-bottom: 3px; }
.specs dd { margin: 0; overflow-wrap: anywhere; }
.specs .wide { grid-column: 1 / -1; }
.stack { display: grid; gap: 12px; }
[data-view-only] .admin-section,
[data-view-only] a[href$="/edit"],
[data-view-only] a[href$="/new"],
[data-view-only] a[href="/catalog/add"],
[data-view-only] a[href*="/filters/new"],
[data-view-only] a[href*="/oil-products/new"],
[data-view-only] a[href$="/engine-oil"],
[data-view-only] a[href$="/systems"],
[data-view-only] a[href="/vehicles/bulk-engine-oil"] { display: none; }
.procedure-text { white-space: pre-line; }
.stack-small { display: grid; gap: 6px; }
.system-choice { display: block; }
.system-form input:not([type="hidden"]):not([type="checkbox"]):not([type="radio"]), .system-form select, .system-form textarea { background: #fff; }
.system-form details > .stack, .system-form details > .form-grid { padding-top: 10px; }
.system-form .checkbox-label { display: flex; align-items: center; gap: 10px; min-height: 44px; }
.system-form .checkbox-label input { flex: 0 0 auto; }
.inline-actions, .actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.actions > a, .actions > button { flex: 1; }
.button, button, input[type="submit"] { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 12px 18px; border: 0; border-radius: 4px; background: var(--surface); color: var(--ink); font-weight: 500; cursor: pointer; text-decoration: none; transition: background-color .33s, color .33s; }
.button:hover, button:hover { background: #e8e8e8; text-decoration: none; }
.primary, form > button[type="submit"], .estimate-form button { background: var(--accent); color: #fff; }
.primary:hover, form > button[type="submit"]:hover, .estimate-form button:hover { background: #345bc0; }
.button:active, button:active { background: var(--ink); color: #fff; }
button:disabled { cursor: wait; opacity: .6; }
.text-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--muted); font-size: 13px; }
.alert, [role="alert"] { padding: 12px 14px; background: var(--surface); border-left: 3px solid var(--ink); border-radius: 4px; margin-bottom: 16px; overflow-wrap: anywhere; }
.empty { padding: 24px 16px; text-align: center; background: var(--surface); border-radius: var(--radius); color: var(--muted); }
.ui-status { position: fixed; z-index: 4; top: 66px; left: 50%; transform: translateX(-50%); max-width: calc(100vw - 32px); padding: 10px 16px; background: var(--ink); color: #fff; border-radius: 4px; font-size: 13px; }
main[aria-busy="true"] .result-grid { opacity: .6; pointer-events: none; }
.picker { padding: 12px 16px; margin-bottom: 12px; background: var(--surface); border-radius: var(--radius); }
.picker > summary { min-height: 32px; }
.select-grid, .refine-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; }
.form-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; }
.select-grid { padding-top: 12px; }
.refine-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.refine-grid .engine-field { grid-column: 1 / -1; }
.refine-picker form { padding-top: 12px; }
.selection-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.selection-bar > h2 { font-size: 24px; }
.eyebrow { margin-bottom: 4px; color: var(--muted); font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }
.vehicle-picker { position: relative; margin-bottom: 16px; padding: 18px; border: 1px solid #e5e6e8; border-radius: 20px; background: #f7f7f8; box-shadow: 0 18px 50px -38px rgba(31, 38, 55, .42); }
.vehicle-picker .selection-bar { margin-bottom: 16px; }
.vehicle-picker .selection-bar > h2 { font-size: 26px; letter-spacing: -.025em; }
.vehicle-picker-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 10px; }
.vehicle-picker-form { position: relative; min-width: 0; }
.vehicle-combobox { display: none; position: relative; }
.js .vehicle-combobox { display: block; }
.js .vehicle-native-field, .js .vehicle-native-select { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; }
.vehicle-field-trigger { position: relative; width: 100%; min-height: 64px; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-content: center; justify-content: stretch; gap: 1px 12px; padding: 10px 46px 10px 14px; border: 1px solid transparent; border-radius: 14px; background: #eceef1; text-align: left; transition: border-color .25s cubic-bezier(.16, 1, .3, 1), background-color .25s cubic-bezier(.16, 1, .3, 1), transform .18s cubic-bezier(.16, 1, .3, 1); }
.vehicle-field-trigger:hover { background: #e6e8eb; }
.vehicle-field-trigger:active { transform: translateY(1px); color: var(--ink); }
.vehicle-field-trigger.is-selected { background: #e8effc; }
.vehicle-field-trigger[aria-expanded="true"] { border-color: var(--ink); background: #fff; }
.vehicle-field-trigger:disabled { cursor: not-allowed; opacity: .62; }
.vehicle-field-trigger strong { grid-column: 1; min-width: 0; color: var(--ink); font-size: 17px; line-height: 1.2; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.vehicle-field-trigger small { grid-column: 1; margin-top: 2px; }
.vehicle-field-label { grid-column: 1; color: #6b7078; font-size: 12px; line-height: 1.1; }
.vehicle-field-trigger > svg { position: absolute; top: 50%; right: 15px; width: 20px; height: 20px; transform: translateY(-50%); fill: none; stroke: #686e77; stroke-width: 2; transition: transform .25s cubic-bezier(.16, 1, .3, 1); }
.vehicle-field-trigger[aria-expanded="true"] > svg { transform: translateY(-50%) rotate(180deg); }
.vehicle-field-clear { position: absolute; z-index: 1; top: 7px; right: 8px; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: rgba(255, 255, 255, .88); color: #656a72; font-size: 20px; line-height: 1; }
.vehicle-field-clear + .vehicle-select-popover, .vehicle-field-trigger:has(+ .vehicle-field-clear) { padding-right: 74px; }
.vehicle-field-clear:hover { background: #fff; text-decoration: none; }
.vehicle-select-popover { position: absolute; z-index: 2; top: calc(100% + 8px); left: 0; width: 100%; max-height: 390px; padding: 10px; overflow: hidden; border: 1px solid #dedfe2; border-radius: 14px; background: #fff; box-shadow: 0 22px 55px -24px rgba(31, 38, 55, .42); }
.vehicle-search { display: block; }
.vehicle-search input[type="search"] { min-height: 44px; padding: 10px 12px; border: 1px solid #d8dade; border-radius: 10px; background: #f7f7f8; font-size: 15px; }
.vehicle-options { max-height: 310px; margin-top: 8px; overflow-y: auto; overscroll-behavior: contain; scrollbar-gutter: stable; }
.vehicle-options [role="option"] { width: 100%; min-height: 44px; justify-content: flex-start; padding: 10px 11px; border-radius: 8px; background: transparent; text-align: left; }
.vehicle-options [role="option"]:hover, .vehicle-options [role="option"].is-active { background: #f0f2f5; }
.vehicle-options [role="option"][aria-selected="true"] { background: #e8effc; color: #244d9e; }
.vehicle-search-empty { padding: 22px 10px; color: var(--muted); text-align: center; }
.generation-picker-form { position: static; }
.generation-combobox { position: static; }
.generation-popover { top: calc(100% + 10px); max-height: min(680px, calc(100dvh - 170px)); padding: 16px; }
.generation-popover-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 12px; }
.generation-popover-head h3 { font-size: 20px; letter-spacing: -.015em; }
.generation-close { width: 40px; min-height: 40px; padding: 0; border-radius: 50%; font-size: 23px; }
.generation-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 10px; max-height: min(530px, calc(100dvh - 290px)); margin-top: 12px; overflow-y: auto; overscroll-behavior: contain; scrollbar-gutter: stable; }
.generation-card { min-height: 0; display: block; padding: 0; border: 2px solid transparent; border-radius: 13px; background: #dfe3e8; overflow: hidden; text-align: left; opacity: 0; animation: generation-card-in .38s cubic-bezier(.16, 1, .3, 1) forwards; animation-delay: min(calc(var(--card-index) * 35ms), 350ms); }
.generation-card:hover { background: #dfe3e8; border-color: #8e949d; text-decoration: none; transform: translateY(-1px); }
.generation-card:active { color: inherit; transform: translateY(1px) scale(.99); }
.generation-card[aria-selected="true"] { border-color: var(--accent); }
.generation-media { position: relative; display: block; aspect-ratio: 3 / 2; min-height: 160px; overflow: hidden; }
.generation-media.no-image { aspect-ratio: auto; min-height: 112px; }
.generation-media.no-image .generation-fallback { position: relative; min-height: 112px; padding: 18px 14px; }
.generation-media.no-image .generation-fallback svg { width: 120px; }
.generation-media > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .5s cubic-bezier(.16, 1, .3, 1); }
.generation-card:hover .generation-media > img { transform: scale(1.025); }
.generation-fallback { position: absolute; inset: 0; display: grid; place-items: center; align-content: center; gap: 7px; color: #747b84; background: radial-gradient(circle at 75% 15%, #f7f8f9 0, #e3e7eb 55%, #d6dbe0 100%); }
.generation-fallback svg { width: min(76%, 220px); fill: #9ca3ab; }
.generation-fallback > span { position: absolute; top: 15px; right: 14px; font-size: 10px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; }
.generation-shade { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(18, 21, 25, .04) 20%, rgba(18, 21, 25, .8) 100%); }
.generation-check { position: absolute; top: 12px; left: 12px; width: 25px; height: 25px; border: 2px solid rgba(255, 255, 255, .92); border-radius: 50%; background: rgba(31, 35, 40, .25); box-shadow: inset 0 1px 0 rgba(255, 255, 255, .25); }
.generation-card[aria-selected="true"] .generation-check { border: 7px solid #fff; background: var(--accent); }
.generation-copy { position: absolute; right: 14px; bottom: 13px; left: 14px; display: grid; gap: 3px; color: #fff; text-shadow: 0 1px 8px rgba(18, 21, 25, .35); }
.generation-copy strong { font-size: 18px; line-height: 1.1; font-variant-numeric: tabular-nums; }
.generation-copy > span { font-size: 14px; line-height: 1.25; }
.generation-copy small { color: rgba(255, 255, 255, .82); }
.generation-empty { display: grid; justify-items: center; gap: 5px; }
.generation-empty button { min-height: 40px; margin-top: 8px; }
main[aria-busy="true"] .vehicle-picker::after { content: ""; position: absolute; inset: 0; border-radius: 20px; pointer-events: none; background: linear-gradient(105deg, transparent 35%, rgba(255, 255, 255, .72) 48%, transparent 61%); background-size: 220% 100%; animation: picker-shimmer 1.1s ease-in-out infinite; }
@keyframes generation-card-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes picker-shimmer { from { background-position: 130% 0; } to { background-position: -80% 0; } }
form { min-width: 0; }
form p { margin: 0 0 16px; }
label { display: grid; gap: 6px; color: var(--muted); font-size: 12px; }
label > input, label > select, label > textarea { color: var(--ink); }
label[for] { margin-bottom: 6px; }
input:not([type="hidden"]):not([type="checkbox"]):not([type="radio"]), select, textarea { width: 100%; max-width: 100%; min-height: 48px; padding: 12px; border: 1px solid transparent; border-radius: 4px; background: var(--surface); color: var(--ink); font-size: 16px; }
input[type="checkbox"], input[type="radio"] { width: 20px; height: 20px; min-height: 0; margin: 0; accent-color: var(--ink); flex-shrink: 0; }
.bulk-options { max-height: 280px; overflow-y: auto; overscroll-behavior: contain; }
.bulk-option { display: flex; align-items: center; gap: 12px; min-height: 56px; padding: 10px 4px; border-bottom: 1px solid var(--surface); }
.bulk-option span { min-width: 0; color: var(--ink); }
.bulk-option small { display: block; color: var(--muted); margin-top: 3px; }
.bulk-picker .search-form { margin-bottom: 12px; }
input:not([type="hidden"]):focus, select:focus, textarea:focus { border-color: var(--ink); outline-offset: 2px; }
.picker input, .picker select, .tile input, .tile select { background: #fff; }
input[type="file"] { font-size: 14px; overflow: hidden; }
textarea { resize: vertical; min-height: 104px; }
fieldset { margin: 0 0 16px; padding: 16px; min-width: 0; border: 0; border-radius: var(--radius); background: var(--surface); }
fieldset input:not([type="hidden"]), fieldset select, fieldset textarea { background: #fff; }
legend { padding: 0 6px; font-size: 16px; font-weight: 500; }
form > details { margin-bottom: 16px; background: var(--surface); padding: 4px 12px; border-radius: var(--radius); }
form > details[open] { padding-bottom: 12px; }
.js [data-auto] button[type="submit"] { display: none; }
.js [data-auto] .fallback-actions { display: none; }
.tabs { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); gap: 4px; background: var(--surface); padding: 4px; border-radius: 4px; margin: 16px 0; }
.tabs a { display: grid; place-items: center; min-height: 44px; padding: 8px 4px; font-size: 13px; color: var(--muted); }
.tabs a[aria-selected="true"] { background: #fff; color: var(--ink); border-radius: 4px; font-weight: 500; }
.panel > h3 { margin: 0 0 12px; }
.filter-list { list-style: none; padding: 0; display: grid; gap: 8px; }
.filter-list li { margin: 0; }
.filter-list a { display: inline-block; font-weight: 500; }
.filter-list .muted { display: block; margin-top: 3px; }
#filters > .actions { margin-bottom: 16px; }
.engine-content { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 12px; }
.engine-content .oil-block { grid-column: 1 / -1; }
.quick-card-label { margin: -4px 0 10px; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.service-empty { margin: -4px 0 10px; color: var(--muted); font-size: 12px; }
.filter-dimensions { margin: 12px 0 20px; }
.oil-metric { display: flex; gap: 16px; align-items: center; }
.oil-metric > * { min-width: 0; }
.oil-metric p { margin: 0; }
.engine-extra { margin-top: 8px; }
.engine-extra summary { font-size: 12px; color: var(--muted); min-height: 32px; }
.engine-extra[open] { padding-bottom: 8px; }
.vehicle-summary { margin: 12px 0; }
.fluids-stack { display: grid; gap: 12px; }
.oil-products-card { margin-bottom: 0; }
.vehicle-summary p { color: var(--muted); }
.vehicle-summary .specs { margin-top: 14px; }
.card-reference { margin-top: 14px; }
.card-reference summary { font-size: 15px; }
.card-reference p { margin-top: 8px; color: var(--body); }
.admin-section { margin-top: 20px; color: var(--muted); }
.admin-section a { display: inline-flex; min-height: 44px; align-items: center; }
.estimate-grid { display: grid; gap: 12px; }
.estimate-grid p { margin: 0; }
.estimate-grid .tile { padding: 14px; }
.estimate-grid input { background: #fff; }
.estimate-result { margin-top: 16px; }
.estimate-result .total { background: var(--ink); color: #fff; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.quote-line { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.quote-line > * { min-width: 0; }
.quote-line + .quote-line { margin-top: 12px; }
.quote-line small { display: block; margin-top: 3px; }
.search-form { display: grid; gap: 10px; margin-bottom: 20px; }
.search-form > button { width: 100%; }
.file-row { background: var(--surface); padding: 12px; border-radius: var(--radius); display: grid; gap: 6px; }
.file-row label { color: var(--ink); }
.file-row a { justify-self: start; color: var(--muted); font-size: 12px; }
.file-row input { background: #fff; }
table { max-width: 100%; border: 0; border-collapse: collapse; font-size: 13px; }
td, th { text-align: left; padding: 12px; border: 0; vertical-align: top; overflow-wrap: anywhere; }
th { font-weight: 500; }
.pagination { display: flex; justify-content: space-between; margin-top: 16px; }
@media (min-width: 600px) {
  .result-grid, .bento-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .select-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .refine-grid { grid-template-columns: minmax(0, 2fr) minmax(0, 2fr) minmax(0, 1fr); }
  .refine-grid .engine-field { grid-column: auto; }
  .estimate-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .search-form { grid-template-columns: repeat(3, minmax(0, 1fr)) auto; align-items: end; }
  .search-form p { margin: 0; }
}
@media (min-width: 700px) {
  .vehicle-picker { padding: 22px; }
  .vehicle-picker-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .generation-picker-form { grid-column: 1 / -1; }
  .generation-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .vehicle-picker-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .generation-picker-form { grid-column: auto; }
  .generation-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 900px) {
  html { scroll-padding-bottom: 24px; }
  .app-header { padding: 14px max(24px, calc((100vw - 1088px) / 2)); }
  .desktop-nav { display: flex; gap: 24px; align-items: center; }
  .desktop-nav a { display: flex; align-items: center; min-height: 44px; color: var(--muted); }
  .desktop-nav a[aria-current="page"] { color: var(--ink); font-weight: 500; }
  .bottom-nav { display: none; }
  .page { padding-top: 24px; padding-bottom: 48px; }
  .page > form:not(.search-form):not(.estimate-form) { max-width: 720px; }
  .vehicle-summary .specs { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

@media (max-width: 699px) {
  .picker-open { overflow: hidden; }
  .generation-popover { position: fixed; z-index: 4; inset: 0; width: 100%; max-height: none; padding: max(18px, env(safe-area-inset-top)) 16px max(18px, env(safe-area-inset-bottom)); border: 0; border-radius: 0; }
  .generation-grid { max-height: calc(100dvh - 180px - env(safe-area-inset-top) - env(safe-area-inset-bottom)); }
  .vehicle-picker { padding: 16px; border-radius: 16px; }
  .vehicle-picker .selection-bar > h2 { font-size: 24px; }
}

.form-shell { max-width: 760px; margin-inline: auto; }
.form-section { display: grid; gap: 16px; }
.form-section > h3 { margin-bottom: 2px; }
.form-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.form-actions > button, .form-actions > a { flex: 1 1 140px; }
.form-shell details > .form-grid, .form-shell details > .stack { padding-top: 12px; }
.form-section input:not([type="hidden"]):not([type="checkbox"]):not([type="radio"]), .form-section select, .form-section textarea { background: #fff; }
.form-shell summary, .system-form .engine-extra summary { min-height: 44px; font-size: 14px; }
.creation-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.creation-grid .tile { min-height: 170px; }
.creation-grid .text-link { margin-top: auto; }
.filter-picker { display: grid; gap: 10px; }
.filter-picker label { display: flex; align-items: center; gap: 12px; padding: 12px; border: 1px solid #ddd; border-radius: 8px; }
.filter-picker label > span { min-width: 0; color: var(--ink); }
.filter-picker small { display: block; margin-top: 4px; }
@media (max-width: 480px) { .form-actions > button { flex-basis: 100%; } }

/* Learning game surfaces.  These selectors are intentionally scoped so the
   training UI cannot inherit inline-anchor behaviour from legacy catalog tiles. */
.learning-modes { display: grid; grid-template-columns: minmax(0, 1fr); gap: 14px; margin: 26px 0; }
.learning-modes .tile { display: grid; min-height: 158px; align-content: start; gap: 10px; padding: 22px; border: 1px solid #e2e4e8; background: #f7f8fa; transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease; }
.learning-modes .tile:hover { border-color: #b9c0cc; box-shadow: 0 14px 30px -24px rgba(25, 32, 45, .5); transform: translateY(-2px); text-decoration: none; }
.learning-modes h2 { font-size: 24px; letter-spacing: -.02em; }
.learning-modes p { max-width: 30ch; color: var(--muted); }
.hero { max-width: 760px; padding: 22px 0 8px; }
.hero h1 { margin-top: 4px; font-size: clamp(34px, 5vw, 48px); letter-spacing: -.035em; }
.hero .lead { max-width: 62ch; margin-top: 12px; color: var(--body); font-size: clamp(16px, 2vw, 20px); line-height: 1.45; }
.learning-modes + .surface { margin-top: 12px; padding: 22px; border: 1px solid #e2e4e8; border-radius: var(--radius); background: #fff; }
[data-learning-setup] { max-width: 760px; padding: 22px; border: 1px solid #e2e4e8; border-radius: var(--radius); background: #fff; }
[data-learning-setup] .learning-scope { margin-right: 8px; }
[data-learning-setup] .stack { max-height: 320px; overflow: auto; padding: 10px 2px; }
.learning-picker { position: relative; display: block; margin-top: 8px; }
.learning-filter-label { color: var(--muted); font-size: 12px; }
.learning-picker > input[type="search"] { background: #f7f8fa; border: 1px solid #d9dce2; }
.learning-option-list { display: grid; max-height: 280px; margin-top: 8px; overflow-y: auto; border: 1px solid #e1e3e7; border-radius: 10px; background: #fff; }
.learning-option { display: flex; grid-template-columns: auto 1fr; align-items: center; gap: 10px; min-height: 48px; padding: 10px 12px; color: var(--ink); font-size: 14px; cursor: pointer; }
.learning-option:hover { background: #f2f5fa; }
.learning-option + .learning-option { border-top: 1px solid #f0f1f3; }
.learning-option input { width: 20px; height: 20px; accent-color: var(--accent); }
[data-learning-session] { max-width: 760px; min-height: 300px; padding: clamp(22px, 5vw, 42px); border: 1px solid #e2e4e8; border-radius: 16px; background: #fff; box-shadow: 0 18px 44px -34px rgba(31, 38, 55, .45); }
[data-learning-session] h2 { font-size: clamp(24px, 4vw, 34px); }
.learning-choices { display: grid; grid-template-columns: minmax(0, 1fr); gap: 10px; margin: 22px 0 4px; }
.learning-choice { position: relative; display: flex; align-items: center; min-height: 64px; padding: 14px 16px; border: 1px solid #d9dce2; border-radius: 12px; background: #f8f9fb; color: var(--ink); font-size: 16px; cursor: pointer; transition: border-color .18s ease, background-color .18s ease, transform .18s ease; }
.learning-choice:hover { border-color: #9ca6b7; background: #f0f3f8; transform: translateY(-1px); }
.learning-choice:has(input:checked) { border-color: var(--accent); background: #eaf0ff; box-shadow: 0 0 0 2px rgba(62,106,225,.12); }
.learning-choice input { margin-right: 12px; accent-color: var(--accent); }
.answer-correct, .answer-wrong { margin-top: 14px; padding: 14px 16px; border-radius: 10px; font-weight: 500; }
.answer-correct { background: #eaf7ee; color: #176b35; }
.answer-wrong { background: #fff0f0; color: #9b2424; }
@media (min-width: 700px) { .learning-modes { grid-template-columns: repeat(3, minmax(0, 1fr)); } }

.learn-page { max-width: 960px; margin-inline: auto; }
.learn-page .hero { padding: 12px 0 28px; }
.learn-page .hero h1 { font-size: clamp(28px, 4vw, 38px); }
.learn-page .hero .lead { font-size: 17px; }
.learn-dashboard { border-block: 1px solid #e1e3e7; padding-block: 24px; }
.learn-today { display: grid; grid-template-columns: minmax(0, 1fr); gap: 20px; }
.learn-today h2, .learn-mistakes h2, .learn-mode-list h2 { font-size: 22px; }
.learn-today p:not(.eyebrow) { margin-top: 8px; max-width: 55ch; color: var(--muted); }
.learn-today-actions { display: grid; gap: 8px; align-content: start; }
.learn-metrics { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; margin-block: 26px; }
.learn-metrics > div:last-child { grid-column: 1 / -1; }
.learn-metrics dt { font-size: 13px; color: var(--muted); }
.learn-metrics dd { margin: 6px 0 0; font-size: 23px; font-weight: 500; font-variant-numeric: tabular-nums; }
.learn-metrics small { display: block; margin-top: 5px; }
.learn-mistakes { border-top: 1px solid #e1e3e7; padding-top: 22px; }
.learn-mistakes .card-heading { align-items: center; flex-wrap: wrap; }
.learn-mistakes ul { list-style: none; padding: 0; display: grid; gap: 12px; }
.learn-mistakes li { margin: 0; padding: 14px 16px; border-radius: 10px; background: #f7f8fa; }
.learn-mistakes li p { margin-top: 5px; color: var(--body); }
.learn-mode-list { display: grid; margin-block: 24px; }
.learn-mode-list > a { display: grid; grid-template-columns: 28px minmax(0, 1fr) 24px; gap: 14px; align-items: center; padding: 22px 8px; border-bottom: 1px solid #e4e6ea; }
.learn-mode-list > a:hover { background: #f7f8fa; text-decoration: none; }
.learn-mode-list > a p { margin-top: 5px; color: var(--muted); }
.learn-footnote { color: var(--muted); font-size: 13px; line-height: 1.6; }
[data-learning-setup].learn-setup { display: grid; gap: 22px; padding: clamp(18px, 4vw, 30px); }
.learn-coverage { margin-bottom: 18px; color: var(--body); }
.learn-multiselect { position: relative; margin-top: 8px; }
.learn-multiselect .vehicle-field-trigger { display: flex; width: 100%; padding: 14px 18px; justify-content: space-between; }
.learn-multiselect .vehicle-field-trigger > span:first-child { display: grid; gap: 4px; min-width: 0; }
.learn-multiselect .vehicle-select-popover { top: calc(100% + 6px); max-height: 410px; padding: 12px; }
.learn-option-results { max-height: 235px; overflow: auto; margin-top: 8px; overscroll-behavior: contain; }
.learn-option-results .learning-option { border-radius: 6px; }
.learn-selected { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 10px; }
.learn-selected button { min-height: 36px; padding: 7px 10px; border-radius: 7px; background: #e8effc; color: #244d9e; font-size: 13px; gap: 12px; }
.learn-guess { display: flex; align-items: center; gap: 10px; color: var(--body); font-size: 14px; min-height: 40px; }
.learn-error { color: #9b2424; font-size: 14px; }
.learn-error:empty { display: none; }
.learn-loading { min-height: 220px; border-radius: 12px; background: linear-gradient(110deg, #f4f5f7 35%, #fafbfc 50%, #f4f5f7 65%); background-size: 220% 100%; animation: picker-shimmer 1.5s ease-in-out infinite; }
.learn-session-page { max-width: 800px; }
[data-learning-session] { display: grid; gap: 20px; max-width: 800px; box-shadow: none; padding: clamp(18px, 4vw, 32px); }
[data-learning-session] h2 { font-size: clamp(23px, 3vw, 29px); }
.learn-question-meta { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; font-size: 13px; color: var(--muted); }
[data-learning-session] progress { width: 100%; height: 5px; border: 0; accent-color: var(--accent); border-radius: 4px; overflow: hidden; }
progress::-webkit-progress-bar { background: #edf0f4; }
progress::-webkit-progress-value { background: var(--accent); }
.learn-car { display: grid; gap: 18px; padding: 18px; background: #f7f8fa; border-radius: 12px; min-width: 0; }
.learn-car img { display: block; width: 100%; max-height: 220px; object-fit: cover; border-radius: 8px; }
.learn-car-name { font-size: 21px; font-weight: 500; }
.learn-car-generation { color: var(--muted); margin-top: 4px; }
.learn-details { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.learn-details span { padding: 5px 9px; background: #fff; border-radius: 5px; font-size: 14px; font-variant-numeric: tabular-nums; }
.learn-association { display: grid; gap: 20px; padding-block: 4px; }
.learn-association dt { color: var(--muted); font-size: 13px; }
.learn-association dd { margin: 6px 0 0; font-size: 25px; font-weight: 500; }
.learn-answer-form { display: grid; gap: 15px; }
.learn-answer-form .learning-choices { margin: 0; }
.learn-answer-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.learn-answer-actions > button { flex: 1 1 160px; }
.learn-recall { display: grid; gap: 14px; }
.learn-recall input { border: 1px solid #d9dce2 !important; }
.learn-think { padding-block: 12px; color: var(--muted); }
.learning-choice.is-correct { border-color: #388452; background: #eaf7ee; }
.learning-choice.is-wrong { border-color: #b94747; background: #fff0f0; }
[data-learning-session] .answer-correct, [data-learning-session] .answer-wrong { margin-top: 0; display: grid; gap: 10px; font-weight: 400; }
[data-learning-session] .text-link { justify-self: start; background: none; padding: 4px 0; font-weight: 400; }
.learn-page button:disabled { cursor: default; }
.learn-comparison { display: grid; gap: 14px; margin-top: 8px; color: var(--ink); }
.learn-comparison > div > p { margin-bottom: 8px; font-size: 13px; }
.learn-comparison .learn-car-name { font-size: 17px; }
.learn-practice-entry { display: grid; gap: 20px; align-items: center; padding: 26px; margin-block: 26px; border: 1px solid #dce2eb; border-radius: 14px; background: #f7f9fc; }
.learn-practice-entry h2 { font-size: 24px; }
.learn-basic-entry { border-color: #c9d6ee; }
.learn-basic-setup { display: grid; gap: 22px; padding: clamp(18px, 4vw, 30px); }
.learn-basic-topics { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.learn-basic-topics button { display: grid; gap: 5px; padding: 18px; text-align: left; white-space: normal; border: 1px solid #dce2eb; background: #f8f9fb; }
.learn-basic-topics button span { color: var(--muted); font-size: 14px; }
.learn-basic-topics [aria-pressed="true"], .learn-basic-count [aria-pressed="true"] { border-color: #4568b3; background: #edf2fc; color: #224786; }
.learn-basic-ready strong { font-size: 24px; font-variant-numeric: tabular-nums; }
.learn-basic-count { border: 0; padding: 0; margin: 0; min-width: 0; }
.learn-basic-count legend { margin-bottom: 10px; color: var(--muted); }
.learn-basic-count > div { display: flex; flex-wrap: wrap; gap: 8px; }
.learn-basic-count button { min-width: 54px; border: 1px solid #dce2eb; }
.learn-basic-roster { margin-block: 32px; }
.learn-basic-roster > .vehicle-search { margin-block: 20px 10px; }
.learn-basic-filters { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 18px; gap: 10px; }
.learn-basic-filter { display: flex; gap: 12px; align-items: flex-start; padding: 16px; background: #f8f9fb; border: 1px solid #e0e4eb; border-radius: 10px; cursor: pointer; }
.learn-basic-filter.is-selected { border-color: #4568b3; background: #edf2fc; }
.learn-basic-filter > input { flex: 0 0 20px; width: 20px; height: 20px; margin-top: 3px; }
.learn-basic-filter > span { min-width: 0; display: grid; gap: 5px; }
.learn-basic-filter strong { font-size: 17px; }
.learn-basic-filter small, .learn-basic-status { font-size: 13px; color: var(--muted); }
.learn-basic-status.is-ready { color: #276342; }
@media (max-width: 580px) { .learn-basic-topics, .learn-basic-filters { grid-template-columns: 1fr; } }
.learn-practice-entry p:not(.eyebrow) { color: var(--muted); margin-top: 8px; max-width: 55ch; }
.learn-sets { padding-block: 20px; border-block: 1px solid #e1e3e7; }
.learn-saved-set { padding-block: 18px; border-top: 1px solid #eceef2; }
.learn-saved-set p { color: var(--muted); margin-block: 8px 14px; }
.learn-saved-set .actions { align-items: center; }
.learn-saved-set .actions > * { flex: initial; }
.learn-set-setup { display: grid; gap: 12px; padding-top: 12px; border-top: 1px solid #e1e3e7; }
.learn-extra-scopes { display: grid; gap: 10px; }
.learn-extra-scopes details { border: 1px solid #e1e3e7; border-radius: 10px; padding: 4px 12px; }
.learn-extra-scopes details[open] { padding-bottom: 12px; }
.learn-customer { margin: 0; padding: 20px; border-left: 3px solid var(--accent); border-radius: 0 12px 12px 0; background: #f1f5fc; }
.learn-customer span { display: block; color: var(--muted); font-size: 12px; margin-bottom: 8px; }
.learn-customer p { font-size: 19px; line-height: 1.5; }
.learn-order-identify, .learn-order-pick { display: grid; gap: 18px; }
.learn-order-identify .learning-choices, .learn-order-pick .learning-choices { margin: 0; }
.learn-order-results { display: grid; gap: 12px; }
.learn-order-results details { padding: 12px 16px; border: 1px solid #e1e3e7; border-radius: 10px; }
.learn-order-results details[open] { display: grid; gap: 14px; }
.learn-order-results details > p { margin-top: 10px; }
.learn-component-list { display: grid; gap: 8px; margin-block: 14px; font-size: 14px; }
.learn-component-list .is-ok { color: #176b35; }
.learn-component-list .is-error { color: #9b2424; }
.learn-question-tools { display: grid; gap: 12px; border-top: 1px solid #e1e3e7; padding-top: 18px; }
.learn-question-tools > button { justify-self: start; font-size: 13px; }
.learn-report-form { display: grid; gap: 12px; }
.learn-sources { padding: 18px; border: 1px solid #dce2eb; background: #f8f9fb; border-radius: 10px; }
.learn-sources h3 { margin: 18px 0 10px; }
.learn-sources ul { display: grid; gap: 10px; padding-left: 18px; }
.learn-sources li { margin: 0; }
.learn-sources a { color: #244d9e; text-decoration: underline; overflow-wrap: anywhere; }
.learn-sources li p, .learn-sources li small { display: block; margin-top: 5px; }
.learn-source-notice { color: var(--body); }
.learn-review-item { display: grid; gap: 15px; padding: 24px 0; border-bottom: 1px solid #e1e3e7; }
.learn-review-item h2 { font-size: 22px; }
.learn-review-form { display: grid; gap: 14px; max-width: 700px; padding: 20px; background: #f7f8fa; border-radius: 12px; }
.learn-review-form input, .learn-review-form select, .learn-review-form textarea { background: #fff !important; }
.learn-review-item > button { justify-self: start; }
@media (min-width: 700px) {
  .learn-today { grid-template-columns: minmax(0, 1fr) auto; }
  .learn-metrics { grid-template-columns: 1fr 1fr 2fr; }
  .learn-metrics > div:last-child { grid-column: auto; }
  .learn-car:has(img) { grid-template-columns: 220px minmax(0, 1fr); align-items: center; }
  .learn-comparison { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .learn-practice-entry { grid-template-columns: minmax(0, 1fr) auto; }
}
/* Store updates reuse the catalog's surfaces and controls. */
.shop-page{max-width:1200px;margin-inline:auto}.shop-page h1{font-size:clamp(1.8rem,4vw,2.8rem)}
.shop-statuses{display:flex;flex-wrap:wrap;gap:.5rem}.shop-statuses [aria-current=page]{background:var(--accent,#3d66df);color:#fff}
.shop-items{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}.shop-item{min-width:0;overflow-wrap:anywhere}
.shop-item h2{font-size:1.2rem}.shop-state{font-size:.8rem;padding:.4rem .6rem;border-radius:.5rem;background:#f1f3f7;white-space:nowrap}
.shop-price{display:flex;align-items:baseline;flex-wrap:wrap;gap:.5rem}.shop-price strong{font-size:1.4rem;font-variant-numeric:tabular-nums}
.shop-binding{padding-block:1rem}.shop-target-results{max-height:18rem;overflow:auto;border:1px solid #dce0e8;border-radius:.75rem}
.shop-target-results button{display:block;width:100%;text-align:left;background:transparent;border:0;border-radius:0;padding:.8rem}.shop-target-results button:hover,.shop-target-results button:focus{background:#eef2ff}
.shop-local-price{font-variant-numeric:tabular-nums}.shop-page form[data-shop-update] button{min-width:15rem}
@media(max-width:700px){.shop-page>.page-heading{flex-direction:column;align-items:stretch}.shop-page>.page-heading>a{align-self:flex-start}}
@media(max-width:700px){.shop-items{grid-template-columns:minmax(0,1fr)}.shop-page .card-heading{flex-wrap:wrap}.shop-page form[data-shop-update]{width:100%}.shop-page form[data-shop-update] button{width:100%;min-width:0}}

/* Unified product catalog. */
.catalog-page { max-width: 1120px; margin-inline: auto; }
.catalog-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; padding: 12px 0 26px; }
.catalog-heading h1 { margin-top: 3px; font-size: clamp(32px, 5vw, 46px); letter-spacing: -.035em; }
.catalog-heading h1 + p { max-width: 52ch; margin-top: 9px; color: var(--muted); font-size: 16px; }
.catalog-heading > a { flex: 0 0 auto; }
.catalog-search { max-width: none !important; margin-bottom: 18px; padding: 18px; border-radius: 14px; background: var(--surface); }
.catalog-search > label { display: block; margin-bottom: 8px; color: var(--muted); font-size: 12px; }
.catalog-search > div { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; }
.catalog-search input { min-width: 0; background: #fff; }
.catalog-jump { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-bottom: 34px; }
.catalog-jump a { display: flex; align-items: center; justify-content: space-between; min-height: 54px; padding: 12px 16px; border: 1px solid #e1e3e7; border-radius: 10px; font-weight: 500; transition: border-color .2s cubic-bezier(.16, 1, .3, 1), transform .2s cubic-bezier(.16, 1, .3, 1); }
.catalog-jump a:hover { border-color: #9ca3af; text-decoration: none; transform: translateY(-1px); }
.catalog-jump a:active { transform: translateY(1px); }
.catalog-jump span { color: var(--muted); font-variant-numeric: tabular-nums; }
.catalog-section { padding: 28px 0; border-top: 1px solid #e1e3e7; scroll-margin-top: 82px; }
.catalog-section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; margin-bottom: 18px; }
.catalog-section-heading h2 { max-width: 28ch; font-size: clamp(22px, 3vw, 28px); letter-spacing: -.02em; }
.catalog-product-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid #e4e6e9; }
.catalog-product { display: grid; align-content: start; gap: 7px; min-width: 0; padding: 18px 14px; border-bottom: 1px solid #e4e6e9; transition: background-color .2s cubic-bezier(.16, 1, .3, 1), transform .2s cubic-bezier(.16, 1, .3, 1); }
.catalog-product:nth-child(odd) { border-right: 1px solid #e4e6e9; }
.catalog-product:hover { background: #f7f8fa; text-decoration: none; }
.catalog-product:active { transform: translateY(1px); }
.catalog-product > span { color: var(--muted); font-size: 12px; }
.catalog-product > strong { font-size: 17px; line-height: 1.3; overflow-wrap: anywhere; }
.catalog-product > small { margin-top: 4px; }
.catalog-product-grid > .empty { grid-column: 1 / -1; }
@media (max-width: 620px) {
  .catalog-heading { display: grid; align-items: start; }
  .catalog-heading > a { justify-self: start; }
  .catalog-search > div { grid-template-columns: minmax(0, 1fr); }
  .catalog-jump { margin-bottom: 24px; }
  .catalog-product-grid { grid-template-columns: minmax(0, 1fr); }
  .catalog-product:nth-child(odd) { border-right: 0; }
  .catalog-section-heading { align-items: flex-start; }
}

/* Application navigation: local Material icons, fast actions and mobile dock. */
.material-icon { width: 20px; height: 20px; display: block; flex: 0 0 auto; fill: currentColor; }
.app-menu { position: relative; flex: 0 0 auto; }
.app-menu > summary {
  min-width: 0;
  min-height: 46px;
  padding: 0 13px;
  border: 1px solid transparent;
  border-radius: 12px;
  gap: 8px;
  background: var(--surface);
  transition: background-color .2s cubic-bezier(.16, 1, .3, 1), border-color .2s cubic-bezier(.16, 1, .3, 1), transform .2s cubic-bezier(.16, 1, .3, 1);
}
.app-menu > summary:hover { background: #eceef1; }
.app-menu > summary:active { transform: translateY(1px); }
.app-menu > summary::after {
  content: "";
  width: 7px;
  height: 7px;
  margin: -4px 1px 0 4px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform .2s cubic-bezier(.16, 1, .3, 1), margin .2s cubic-bezier(.16, 1, .3, 1);
}
.app-menu[open] > summary { border-color: #dfe1e5; background: #fff; }
.app-menu[open] > summary::after { content: ""; margin-top: 4px; transform: rotate(225deg); }
.menu-content {
  top: calc(100% + 10px);
  right: 0;
  width: min(390px, calc(100vw - 24px));
  max-height: calc(100dvh - 82px);
  padding: 14px;
  border: 1px solid #e0e2e6;
  border-radius: 18px;
  background: rgba(247, 248, 250, .98);
  box-shadow: 0 26px 70px -32px rgba(20, 26, 38, .48), 0 8px 22px -18px rgba(20, 26, 38, .35);
  overscroll-behavior: contain;
}
.menu-heading { display: flex; align-items: center; justify-content: space-between; padding: 3px 4px 13px; }
.menu-heading strong { display: block; font-size: 15px; }
.menu-heading small { display: block; margin-top: 2px; }
.menu-quick-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.menu-content .menu-quick-actions a {
  min-height: 78px;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  padding: 12px;
  border: 1px solid #e3e5e9;
  border-radius: 12px;
  background: #fff;
  transition: border-color .18s cubic-bezier(.16, 1, .3, 1), transform .18s cubic-bezier(.16, 1, .3, 1), box-shadow .18s cubic-bezier(.16, 1, .3, 1);
}
.menu-content .menu-quick-actions a:hover { border-color: #b9bec7; box-shadow: 0 10px 22px -20px rgba(23, 26, 32, .55); transform: translateY(-1px); }
.menu-content .menu-quick-actions a:active { transform: translateY(1px); }
.menu-quick-actions a > .material-icon { width: 22px; height: 22px; }
.menu-quick-actions a > span { min-width: 0; }
.menu-quick-actions strong, .menu-quick-actions small { display: block; }
.menu-quick-actions small { margin-top: 2px; font-size: 11px; }
.menu-separator { margin: 14px 4px 8px; background: #dfe1e5; }
.menu-label { padding: 7px 4px 6px; }
.menu-links { display: grid; gap: 2px; }
.menu-content .menu-links a,
.menu-content .menu-links form button {
  width: 100%;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  padding: 9px 10px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--body);
  font-size: 14px;
  font-weight: 400;
  text-align: left;
}
.menu-content .menu-links a:hover,
.menu-content .menu-links form button:hover { background: #fff; color: var(--ink); text-decoration: none; }
.menu-links .material-icon { width: 19px; height: 19px; color: #747983; }
.menu-content .menu-links a:hover .material-icon,
.menu-content .menu-links form button:hover .material-icon { color: var(--ink); }
.menu-content .menu-links form { margin: 0; }

.bottom-nav {
  right: max(10px, env(safe-area-inset-right));
  bottom: max(10px, env(safe-area-inset-bottom));
  left: max(10px, env(safe-area-inset-left));
  width: auto;
  gap: 3px;
  padding: 6px;
  border: 1px solid rgba(215, 218, 223, .92);
  border-radius: 22px;
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 22px 58px -28px rgba(18, 23, 32, .6), 0 8px 20px -16px rgba(18, 23, 32, .38);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}
.bottom-nav a {
  min-width: 0;
  min-height: 57px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: 6px 4px;
  border-radius: 16px;
  color: #747983;
  font-size: 10px;
  line-height: 1.1;
  transition: background-color .2s cubic-bezier(.16, 1, .3, 1), color .2s cubic-bezier(.16, 1, .3, 1), transform .18s cubic-bezier(.16, 1, .3, 1);
}
.bottom-nav a:hover { text-decoration: none; color: var(--ink); }
.bottom-nav a:active { transform: scale(.97); }
.bottom-nav a .material-icon { width: 22px; height: 22px; }
.bottom-nav a[aria-current="page"] { background: #eff1f4; color: var(--ink); font-weight: 500; }

@media (min-width: 900px) {
  .desktop-nav { gap: 5px; padding: 4px; border-radius: 14px; background: #f7f7f8; }
  .desktop-nav a {
    gap: 7px;
    min-height: 42px;
    padding: 0 12px;
    border-radius: 10px;
    font-size: 13px;
    transition: background-color .2s cubic-bezier(.16, 1, .3, 1), color .2s cubic-bezier(.16, 1, .3, 1), transform .18s cubic-bezier(.16, 1, .3, 1);
  }
  .desktop-nav a:hover { background: #fff; color: var(--ink); text-decoration: none; }
  .desktop-nav a:active { transform: translateY(1px); }
  .desktop-nav a[aria-current="page"] { background: #fff; box-shadow: 0 5px 14px -12px rgba(23, 26, 32, .55); }
  .desktop-nav .material-icon { width: 18px; height: 18px; }
}

@media (max-width: 420px) {
  .app-header { gap: 10px; }
  .app-menu > summary span { display: none; }
  .app-menu > summary { width: 46px; padding: 0; justify-content: center; }
  .app-menu > summary::after { display: none; }
  .menu-content { right: -2px; width: calc(100vw - 24px); }
  .menu-quick-actions { grid-template-columns: minmax(0, 1fr); }
  .menu-content .menu-quick-actions a { min-height: 62px; }
}

@media (max-width: 899px) {
  .menu-content { max-height: calc(100dvh - 150px - env(safe-area-inset-bottom)); }
}

/* Stable form controls shared by catalog, administration and service forms. */
input:not([type="hidden"]):not([type="checkbox"]):not([type="radio"]),
select,
textarea {
  border: 1px solid #d9dde4;
  border-radius: 12px;
  background-color: #fff;
  color: var(--ink);
  box-shadow: 0 1px 0 rgba(20, 26, 38, .02);
  transition: border-color .18s cubic-bezier(.16, 1, .3, 1), box-shadow .18s cubic-bezier(.16, 1, .3, 1), background-color .18s cubic-bezier(.16, 1, .3, 1);
}
input:not([type="hidden"]):not([type="checkbox"]):not([type="radio"]),
select,
.page select {
  height: 54px;
  min-height: 54px;
  padding: 0 15px;
  line-height: 52px;
}
textarea { min-height: 112px; padding: 14px 15px; line-height: 1.45; }
input::placeholder,
textarea::placeholder { color: #9a9fa8; opacity: 1; }
input:not([type="hidden"]):not([type="checkbox"]):not([type="radio"]):hover,
select:hover,
textarea:hover { border-color: #b9bec7; }
input:not([type="hidden"]):not([type="checkbox"]):not([type="radio"]):focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  outline: 0;
  box-shadow: 0 0 0 3px rgba(62, 106, 225, .13);
}
select,
.page select {
  -webkit-appearance: none;
  appearance: none;
  padding-right: 44px;
  background-image: linear-gradient(45deg, transparent 50%, #666c75 50%), linear-gradient(135deg, #666c75 50%, transparent 50%);
  background-repeat: no-repeat;
  background-position: calc(100% - 18px) 24px, calc(100% - 13px) 24px;
  background-size: 5px 5px, 5px 5px;
}
select:disabled,
input:disabled,
textarea:disabled { cursor: not-allowed; color: #858a93; background-color: #eceef1; }
input[type="number"] { -moz-appearance: textfield; }
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button { margin: 0; -webkit-appearance: none; }

/* These surfaces used to override the controls with their own background. */
.form-shell input:not([type="hidden"]):not([type="checkbox"]):not([type="radio"]),
.form-shell select,
.form-shell textarea,
.system-form input:not([type="hidden"]):not([type="checkbox"]):not([type="radio"]),
.system-form select,
.system-form textarea,
.catalog-search input,
.search-form input,
.search-form select,
.picker input,
.picker select,
.tile input:not([type="checkbox"]):not([type="radio"]),
.tile select,
.tile textarea { background-color: #fff; }

.form-grid { align-items: start; }
.form-grid > label,
.form-section .form-grid > label { min-width: 0; }
.form-grid > label > input,
.form-grid > label > select { width: 100%; }

.catalog-search > div { align-items: stretch; }
.catalog-search input,
.catalog-search button { height: 54px; min-height: 54px; }
.catalog-search button {
  min-width: 112px;
  border: 1px solid #d9dde4;
  border-radius: 12px;
  background: #fff;
}
.catalog-search button:hover { border-color: #b9bec7; background: #fff; }

@media (max-width: 620px) {
  .catalog-search button { width: 100%; }
}

/* Learning home: one compact command center instead of competing cards. */
.learn-page .hero { padding: 8px 0 18px; }
.learn-control-center {
  padding: 16px;
  border: 1px solid #e0e3e8;
  border-radius: 20px;
  background: #f7f8fa;
  box-shadow: 0 20px 52px -42px rgba(23, 26, 32, .48);
}
.learn-control-center > .eyebrow { padding: 2px 4px 12px; }
.learn-primary-action {
  width: 100%;
  min-height: 74px;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  align-items: center;
  justify-content: stretch;
  gap: 13px;
  padding: 12px 16px;
  border-radius: 14px;
  background: var(--accent);
  color: #fff;
  text-align: left;
  transition: background-color .2s cubic-bezier(.16, 1, .3, 1), transform .18s cubic-bezier(.16, 1, .3, 1);
}
.learn-primary-action:hover { background: #345bc0; }
.learn-primary-action:active { transform: translateY(1px); }
.learn-primary-action > span:nth-child(2) { min-width: 0; }
.learn-primary-action strong,
.learn-primary-action small { display: block; }
.learn-primary-action strong { font-size: 17px; }
.learn-primary-action small { margin-top: 2px; color: rgba(255, 255, 255, .76); }
.learn-primary-count { min-width: 34px; font-size: 22px; font-weight: 500; text-align: right; font-variant-numeric: tabular-nums; }
.learn-action-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  background: #eef0f3;
  color: #5f6570;
}
.learn-action-icon .material-icon { width: 21px; height: 21px; }
.learn-primary-action .learn-action-icon { background: rgba(255, 255, 255, .16); color: #fff; }
.learn-launch-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-top: 8px; }
.learn-launch-grid > a,
.learn-action-menu > summary {
  min-height: 88px;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) auto;
  align-items: center;
  gap: 11px;
  padding: 12px;
  border: 1px solid #e1e4e9;
  border-radius: 14px;
  background: #fff;
  transition: border-color .18s cubic-bezier(.16, 1, .3, 1), box-shadow .18s cubic-bezier(.16, 1, .3, 1), transform .18s cubic-bezier(.16, 1, .3, 1);
}
.learn-launch-grid > a:hover,
.learn-action-menu > summary:hover { border-color: #b9bec7; box-shadow: 0 12px 24px -22px rgba(23, 26, 32, .55); text-decoration: none; transform: translateY(-1px); }
.learn-launch-grid > a:active,
.learn-action-menu > summary:active { transform: translateY(1px); }
.learn-launch-grid strong,
.learn-launch-grid small { display: block; }
.learn-launch-grid strong { font-size: 15px; }
.learn-launch-grid small { margin-top: 2px; font-size: 11px; }
.learn-action-menu { position: relative; }
.learn-action-menu > summary::after { margin-left: auto; }
.learn-action-menu[open] > summary { border-color: #c8ccd3; }
.learn-action-popover {
  position: absolute;
  z-index: 3;
  top: calc(100% + 8px);
  right: 0;
  width: min(300px, calc(100vw - 64px));
  display: grid;
  gap: 2px;
  padding: 8px;
  border: 1px solid #e0e3e8;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 24px 54px -28px rgba(23, 26, 32, .48);
}
.learn-action-popover a { min-height: 46px; display: grid; grid-template-columns: 28px minmax(0, 1fr); align-items: center; gap: 10px; padding: 8px 10px; border-radius: 9px; }
.learn-action-popover a:hover { background: #f2f4f7; text-decoration: none; }
.learn-action-popover .material-icon { width: 19px; height: 19px; color: #69707b; }
.learn-progress-details { margin-top: 10px; padding: 0 16px; border: 1px solid #e1e4e9; border-radius: 14px; background: #fff; }
.learn-progress-details > summary { min-height: 54px; gap: 12px; }
.learn-progress-details > summary small { margin-left: auto; }
.learn-progress-compact { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)) auto; align-items: end; gap: 12px; padding: 2px 0 16px; }
.learn-progress-compact > div { display: grid; gap: 2px; }
.learn-progress-compact span { color: var(--muted); font-size: 11px; }
.learn-progress-compact strong { font-size: 20px; font-variant-numeric: tabular-nums; }
.learn-progress-compact button { min-height: 42px; }
.learn-sets { margin-top: 24px; }
.learn-sets .card-heading { align-items: center; }
.learn-saved-set .actions > * { min-height: 42px; padding: 9px 13px; border-radius: 9px; }

@media (max-width: 620px) {
  .learn-control-center { padding: 12px; border-radius: 17px; }
  .learn-launch-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .learn-action-menu { grid-column: 1 / -1; }
  .learn-action-menu > summary { min-height: 68px; }
  .learn-progress-details > summary { align-items: center; }
  .learn-progress-details > summary small { max-width: 16ch; text-align: right; }
  .learn-progress-compact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .learn-progress-compact button { grid-column: 1 / -1; }
}