:root {
    /* Warm, friendly palette — basket orange primary, leafy green accent */
    --bg:          #fff9f3;
    --bg-pattern:  #fdf1e3;
    --card:        #ffffff;
    --border:      #f0e2d1;
    --text:        #2a2621;
    --muted:       #7a7266;
    --accent:      #e76f3c;   /* basket orange */
    --accent-dark: #c45428;
    --accent-soft: #fde3d3;
    --leaf:        #2a7a3a;   /* grocery green (secondary) */
    --leaf-dark:   #1e5a2a;
    --warning:     #c07b00;
    --danger:      #b42727;
}

* { box-sizing: border-box; }

html, body {
    margin: 0; padding: 0;
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background:
        radial-gradient(circle at 20% 0%, var(--bg-pattern) 0%, transparent 50%),
        radial-gradient(circle at 90% 10%, var(--accent-soft) 0%, transparent 40%),
        var(--bg);
    color: var(--text);
    min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: var(--accent-soft); padding: 1px 5px; border-radius: 4px;
       font-size: .88em; color: var(--accent-dark); }

/* ---- Topbar / brand ---- */
.topbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px 28px; background: var(--card);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(198,107,58,.04);
}
.brand { display: flex; align-items: center; gap: 10px; }
.logo {
    width: 32px; height: 32px; flex-shrink: 0;
    filter: drop-shadow(0 1px 2px rgba(231,111,60,.2));
}
.brand-text h1 {
    margin: 0; font-size: 1.4rem; font-weight: 800;
    letter-spacing: -.02em; color: var(--text);
    line-height: 1;
}
.brand-text h1 .dot { color: var(--accent); }
.brand-text .tagline {
    margin: 2px 0 0 0; color: var(--muted);
    font-size: .8rem; font-weight: 500;
}

.meta { color: var(--muted); font-size: .85rem; text-align: right; }
.meta .meta-label { display: block; font-size: .75rem; text-transform: uppercase;
                    letter-spacing: .05em; }
.meta .fresh { color: var(--leaf-dark); font-weight: 600; }
.meta .stale { color: var(--warning); font-weight: 600; }

@media (max-width: 640px) {
    .topbar { flex-direction: column; gap: 10px; align-items: flex-start; padding: 14px 18px; }
    .meta { text-align: left; }
    .brand-text h1 { font-size: 1.25rem; }
    .logo { width: 28px; height: 28px; }
}

/* ---- Tabs ---- */
.tabs {
    display: flex; gap: 2px; padding: 0 28px;
    background: var(--card);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
}
.tabs .tab {
    background: transparent; border: none; padding: 14px 20px;
    font-size: .95rem; cursor: pointer; color: var(--muted);
    border-bottom: 3px solid transparent;
    font-weight: 500; white-space: nowrap;
    transition: color .15s, border-color .15s;
}
.tabs .tab:hover { color: var(--text); }
.tabs .tab.active {
    color: var(--accent-dark); border-bottom-color: var(--accent);
    font-weight: 700;
}

main { padding: 24px 28px; max-width: 1200px; margin: 0 auto; }
.panel { display: none; }
.panel.active { display: block; }

h2 { margin-top: 0; }

.grid {
    display: grid; grid-template-columns: 1fr 1.3fr; gap: 24px;
}
@media (max-width: 900px) { .grid { grid-template-columns: 1fr; } }

textarea, input[type=text] {
    width: 100%; border: 1.5px solid var(--border); border-radius: 10px;
    padding: 12px 14px; font-size: 1rem; font-family: inherit;
    background: var(--card); color: var(--text);
    transition: border-color .15s, box-shadow .15s;
}
textarea:focus, input[type=text]:focus {
    outline: none; border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.actions { display:flex; gap:8px; margin-top:12px; flex-wrap: wrap; }
button.primary, button.ghost {
    padding: 10px 18px; border-radius: 10px; font-size: .95rem;
    cursor: pointer; border: 1.5px solid var(--border);
    font-weight: 600; transition: all .15s;
}
button.primary {
    background: var(--accent); color: white; border-color: var(--accent);
    box-shadow: 0 2px 6px rgba(231,111,60,.25);
}
button.primary:hover {
    background: var(--accent-dark); border-color: var(--accent-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(231,111,60,.3);
}
button.ghost { background: var(--card); color: var(--text); }
button.ghost:hover { border-color: var(--muted); }

.hint { color: var(--muted); font-size: .9rem; }
.hint.center { text-align: center; padding: 40px 0; }

.stores-filter {
    margin-top: 16px; background: var(--card);
    border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px;
}
.stores-filter summary { cursor: pointer; font-weight: 600; }
#storeCheckboxes {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 6px; margin-top: 10px;
}
#storeCheckboxes label { display: flex; align-items: center; gap: 6px; font-size:.9rem;}

.result {
    background: var(--card); border: 1px solid var(--border);
    border-radius: 10px; padding: 18px; min-height: 120px;
}

.summary-bar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 14px 18px;
    background: linear-gradient(135deg, var(--accent-soft) 0%, #fff 100%);
    border: 1.5px solid #f0d9c4; border-radius: 12px;
    margin-bottom: 18px;
    box-shadow: 0 2px 8px rgba(231,111,60,.06);
}
.summary-bar strong { font-size: 1.25rem; color: var(--accent-dark); }
.summary-bar > div > div { margin: 2px 0; }

.store-card {
    border: 1.5px solid var(--border); border-radius: 10px;
    padding: 12px 16px; margin-bottom: 12px; background: var(--card);
}
.store-card.cheapest {
    border-color: var(--leaf); background: #f1f8f3;
    box-shadow: 0 2px 6px rgba(42,122,58,.08);
}
.store-head {
    display: flex; justify-content: space-between; align-items: center;
    font-weight: 600; margin-bottom: 8px;
}
.store-head .total { color: var(--accent-dark); font-size: 1.1rem; }
.store-card ul { list-style: none; padding-left: 0; margin: 0; }
.store-card li {
    display: flex; justify-content: space-between; gap: 8px;
    padding: 3px 0; font-size: .92rem;
    border-bottom: 1px dashed #eef;
}
.store-card li:last-child { border-bottom: none; }
.store-card li.miss   { color: var(--danger); }
.store-card li .est   { color: var(--warning); font-size: .8rem; margin-left: 4px; }

.per-item-table {
    width: 100%; border-collapse: collapse; margin-top: 12px;
}
.per-item-table th, .per-item-table td {
    text-align: left; padding: 8px 6px;
    border-bottom: 1px solid var(--border); font-size: .92rem;
}
.per-item-table th { background: #f3f5fb; }
.per-item-table .price { text-align: right; font-variant-numeric: tabular-nums; }

.search-bar { display: flex; gap: 8px; margin-bottom: 16px; }
.search-bar input {
    flex: 1; padding: 9px 12px; border-radius: 8px; border: 1px solid var(--border);
    font-size: 1rem;
}

.stores-table {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}
.store-tile {
    background: var(--card); border: 1px solid var(--border);
    border-radius: 8px; padding: 12px; display: flex; align-items: center; gap: 10px;
}
.store-tile img { width: 32px; height: 32px; object-fit: contain; }
.store-tile .count { color: var(--muted); font-size: .85rem; }

footer {
    padding: 28px 28px; color: var(--muted); font-size: .85rem;
    border-top: 1px solid var(--border); margin-top: 48px;
    background: var(--card);
}
.footer-inner {
    max-width: 1200px; margin: 0 auto;
    display: flex; justify-content: space-between; align-items: center;
    gap: 16px; flex-wrap: wrap;
}
.footer-inner strong { color: var(--accent-dark); }
.footer-inner .credits { text-align: right; }
@media (max-width: 640px) {
    .footer-inner { flex-direction: column; align-items: flex-start; }
    .footer-inner .credits { text-align: left; }
}

.loading {
    display: inline-block; padding: 20px; color: var(--muted);
}

.max-stores { margin-top: 16px; }
.max-stores label { font-weight: 600; font-size: .95rem; }
.range-row { display: flex; align-items: center; gap: 10px; margin-top: 6px; }
.range-row input[type=range] { flex: 1; }
.range-row #maxStoresLabel {
    display: inline-block; min-width: 2ch; padding: 3px 12px;
    background: var(--accent); color: white; border-radius: 6px;
    font-weight: 700; font-variant-numeric: tabular-nums;
    box-shadow: 0 2px 4px rgba(231,111,60,.25);
}
.range-row input[type=range] {
    accent-color: var(--accent);
}

.route-card {
    background: var(--card);
    border: 1.5px solid var(--border); border-radius: 12px;
    padding: 16px 18px; margin-bottom: 14px;
    box-shadow: 0 2px 8px rgba(231,111,60,.06);
    transition: transform .15s, box-shadow .15s;
}
.route-card:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(231,111,60,.1);
}
.route-card .store-head { margin-bottom: 10px; align-items: center; }
.route-card .store-head .total { font-size: 1.15rem; }
.route-card .store-ico {
    width: 22px; height: 22px; object-fit: contain;
    vertical-align: -5px; margin-right: 6px;
}
.route-card ul { list-style: none; padding: 0; margin: 0; }
.route-card li {
    display: grid;
    grid-template-columns: minmax(120px,auto) 1fr auto;
    gap: 10px; align-items: center;
    padding: 6px 0; border-bottom: 1px dashed #eef;
    font-size: .95rem;
}
.route-card li:last-child { border-bottom: none; }
.route-card li label { cursor: pointer; font-weight: 600; }
.route-card li .product-name { color: var(--muted); font-size: .88rem; }
.route-card li .price { font-variant-numeric: tabular-nums; text-align: right; }
.route-card li input[type=checkbox] { margin-right: 6px; transform: scale(1.1); }
.route-card li label:has(input:checked) { text-decoration: line-through; opacity: .55; }

.missing-note {
    background: #fff6e5; border: 1px solid #f0d694;
    border-radius: 8px; padding: 10px 14px; margin-top: 10px;
    font-size: .9rem;
}

details.collapsible {
    background: var(--card); border: 1px solid var(--border);
    border-radius: 8px; padding: 10px 14px; margin-top: 16px;
}
details.collapsible summary { cursor: pointer; font-weight: 600; }
details.collapsible[open] summary { margin-bottom: 10px; }

/* ---- Route section ---- */
.route-controls {
    margin-top: 20px; padding: 18px;
    background: linear-gradient(135deg, #f1f8f3 0%, var(--card) 100%);
    border: 1.5px solid #cfe3d1; border-radius: 12px;
}
.route-controls .hint { margin-top: 4px; }

.postcode-prompt p { margin: 6px 0; }

.route-summary {
    background: var(--card); border: 1px solid var(--border);
    border-radius: 8px; padding: 10px 14px; margin: 12px 0;
    font-size: 1.05rem;
}

ol.route-list {
    list-style: none; padding-left: 0; margin: 0 0 14px 0;
    border-left: 3px solid var(--leaf); padding-left: 18px;
}
ol.route-list li { padding: 10px 0; position: relative; }
ol.route-list li::before {
    content: ""; position: absolute; left: -24px; top: 13px;
    width: 12px; height: 12px; border-radius: 50%;
    background: var(--accent); border: 2px solid var(--card);
    box-shadow: 0 0 0 2px var(--accent);
}
ol.route-list li.start::before {
    background: var(--leaf); box-shadow: 0 0 0 2px var(--leaf);
}
ol.route-list .step { font-weight: 600; }
ol.route-list .leg { color: var(--muted); font-weight: normal; font-size: .9rem; margin-left: 6px; }
ol.route-list .addr { color: var(--muted); font-size: .9rem; }

a.button-link {
    display: inline-block; padding: 10px 18px;
    background: var(--accent); color: white; text-decoration: none;
    border-radius: 8px; font-weight: 600;
}
a.button-link:hover { background: var(--accent-dark); }
.maps-btn { margin-top: 6px; }