:root {
    --primary: #1976d2;
    --primary-dark: #115293;
    --bg: #f4f6f9;
    --card-bg: #ffffff;
    --text: #212121;
    --text-muted: #666666;
    --border: #e0e0e0;
    --accent: #2e7d32;
    --danger: #c62828;
}

* { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 20px;
}

.container { max-width: 1400px; margin: 0 auto; }

header {
    text-align: center;
    margin-bottom: 20px;
    background: var(--card-bg);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    border-top: 5px solid var(--primary);
}

h1 { color: var(--primary); margin: 0 0 8px 0; font-size: 28px; }
p.subtitle { color: var(--text-muted); margin: 0; font-size: 15px; }

/* ---- source freshness strip ---- */
.source-strip {
    display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 14px;
}
.source-chip {
    display: inline-flex; align-items: center; gap: 7px;
    background: #f5f5f5; border: 1px solid var(--border); border-radius: 999px;
    padding: 5px 13px; font-size: 12.5px; color: var(--text-muted);
}
.source-chip .dot { width: 9px; height: 9px; border-radius: 50%; }
.dot.ok { background: #2e7d32; }
.dot.warn { background: #ef6c00; }
.dot.stale { background: #c62828; }
.source-chip b { color: var(--text); }

/* ---- uploader ---- */
.uploader-bar {
    background: #e3f2fd; border: 2px dashed #90caf9; padding: 16px 20px;
    border-radius: 12px; text-align: center; margin-bottom: 20px;
}
.uploader-bar input[type="file"] { display: none; }
.uploader-label {
    background: var(--primary); color: #fff; padding: 10px 20px; border-radius: 6px;
    cursor: pointer; font-weight: 600; display: inline-block; transition: background .2s;
}
.uploader-label:hover { background: var(--primary-dark); }
.file-info { margin-top: 10px; font-size: 14px; color: var(--text-muted); font-weight: 500; }

/* ---- main filter bar ---- */
.filter-bar {
    background: var(--card-bg); padding: 20px; border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06); margin-bottom: 20px;
    display: flex; flex-wrap: wrap; gap: 15px; align-items: flex-end;
}
.filter-group { display: flex; flex-direction: column; gap: 5px; flex: 1; min-width: 180px; }
.filter-group label { font-size: 13px; font-weight: 600; color: var(--text-muted); }
.filter-group input, .filter-group select {
    padding: 10px; border: 1px solid var(--border); border-radius: 6px;
    font-size: 14px; outline: none; transition: border-color .2s; background: #fff;
}
.filter-group input:focus, .filter-group select:focus { border-color: var(--primary); }
.filter-buttons { display: flex; gap: 10px; flex-wrap: wrap; }

.btn-reset {
    background: #e0e0e0; color: var(--text); border: none; padding: 10px 18px;
    border-radius: 6px; font-weight: 600; cursor: pointer; transition: background .2s;
}
.btn-reset:hover { background: #d5d5d5; }

.btn {
    border: none; padding: 10px 16px; border-radius: 6px; font-weight: 600;
    cursor: pointer; font-size: 14px; transition: background .2s, color .2s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { background: #eceff1; color: var(--text); }
.btn-ghost:hover { background: #dfe3e6; }
.btn-ghost.active { background: var(--primary); color: #fff; }

/* ---- collapsible panels ---- */
.panel {
    background: var(--card-bg); border-radius: 12px; padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06); margin-bottom: 20px;
    border-left: 5px solid var(--primary);
}
.panel-head h2 { margin: 0 0 2px 0; font-size: 18px; color: var(--primary-dark); }
.panel-head .hint { font-size: 13px; color: var(--text-muted); }
.panel-head .hint b.inc { color: var(--accent); }
.panel-head .hint b.exc { color: var(--danger); }
.panel-head { margin-bottom: 14px; }

/* ---- facets ---- */
.facet-grid {
    display: grid; gap: 14px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.facet { border: 1px solid var(--border); border-radius: 10px; padding: 10px; background: #fafbfc; }
.facet h3 { margin: 0 0 8px 0; font-size: 14px; color: var(--text); }
.facet-search {
    width: 100%; padding: 6px 9px; margin-bottom: 8px; font-size: 13px;
    border: 1px solid var(--border); border-radius: 6px; outline: none;
}
.facet-list { max-height: 210px; overflow-y: auto; display: flex; flex-direction: column; gap: 4px; }
.facet-item {
    display: flex; align-items: center; justify-content: space-between; gap: 8px;
    font-size: 13px; padding: 5px 8px; border-radius: 6px; cursor: pointer;
    background: #fff; border: 1px solid transparent; user-select: none;
}
.facet-item:hover { border-color: #cfd8dc; }
.facet-item .cnt { color: var(--text-muted); font-size: 11.5px; white-space: nowrap; }
.facet-item .mark { width: 16px; text-align: center; font-weight: 700; }
.facet-item.inc { background: #e8f5e9; border-color: #a5d6a7; }
.facet-item.inc .mark { color: var(--accent); } .facet-item.inc .mark::before { content: "✓"; }
.facet-item.exc { background: #ffebee; border-color: #ef9a9a; }
.facet-item.exc .mark { color: var(--danger); } .facet-item.exc .mark::before { content: "✕"; }

.text-filters { display: flex; gap: 15px; flex-wrap: wrap; margin-top: 14px; }

/* ---- shopping list ---- */
.list-grid { display: grid; grid-template-columns: 1fr 260px; gap: 16px; }
@media (max-width: 800px) { .list-grid { grid-template-columns: 1fr; } }
#shoppingList {
    width: 100%; padding: 12px; border: 1px solid var(--border); border-radius: 8px;
    font-size: 14px; font-family: inherit; resize: vertical; outline: none;
}
#shoppingList:focus { border-color: var(--primary); }
.list-controls { display: flex; flex-direction: column; gap: 10px; }
.list-controls label { font-size: 13px; font-weight: 600; color: var(--text-muted); }
.list-controls select { padding: 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
.list-controls .check { display: flex; gap: 7px; align-items: center; font-weight: 500; color: var(--text); }
.list-stats { font-size: 13px; color: var(--text-muted); }

.list-line-block { margin-bottom: 26px; }
.list-line-head {
    font-size: 17px; font-weight: 700; color: var(--text);
    padding: 10px 14px; background: #fff; border-radius: 10px 10px 0 0;
    border-bottom: 3px solid var(--accent); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 6px;
}
.list-line-head .n { color: var(--text-muted); font-weight: 500; font-size: 13px; }
.list-line-head.empty { border-bottom-color: #bdbdbd; color: var(--text-muted); }
.list-line-body { background: #fff; border-radius: 0 0 10px 10px; padding: 12px; }

/* ---- category sections + cards (original look kept) ---- */
.section-category { margin-bottom: 35px; }
.section-title {
    font-size: 20px; font-weight: 700; color: var(--text); margin-bottom: 15px;
    padding-bottom: 8px; border-bottom: 2px solid var(--primary);
    display: inline-block; width: 100%;
}
.section-title span { color: var(--text-muted); font-weight: 400; font-size: 14px; margin-left: 8px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 18px; }

.card {
    background: var(--card-bg); border-radius: 10px; overflow: hidden;
    box-shadow: 0 2px 6px rgba(0,0,0,0.07); display: flex; flex-direction: column;
    position: relative; transition: transform .18s, box-shadow .18s;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 8px 18px rgba(0,0,0,0.12); }

.img-container {
    width: 100%; height: 170px; background: #fafafa;
    display: flex; align-items: center; justify-content: center;
    border-bottom: 1px solid #f0f0f0;
}
.img-container img { max-width: 100%; max-height: 100%; object-fit: contain; padding: 8px; }

.card-body { padding: 14px; display: flex; flex-direction: column; flex-grow: 1; }
.product-title {
    font-size: 14.5px; margin: 0 0 10px 0; line-height: 1.35; color: var(--text);
    min-height: 39px; font-weight: 600;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

.price-container { margin-top: auto; margin-bottom: 10px; display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.price-current { font-size: 19px; font-weight: 800; color: var(--accent); }
.price-orig { font-size: 13px; color: var(--text-muted); text-decoration: line-through; }
.price-none { font-size: 13px; color: var(--text-muted); font-style: italic; }

.badge-discount {
    position: absolute; top: 10px; right: 10px; background: #d32f2f; color: #fff;
    font-size: 12.5px; font-weight: 700; padding: 4px 8px; border-radius: 6px; z-index: 2;
}
.badge-retailer {
    position: absolute; top: 10px; left: 10px; background: rgba(25,118,210,0.92); color: #fff;
    font-size: 11px; font-weight: 600; padding: 4px 8px; border-radius: 6px; z-index: 2;
    max-width: 65%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.badge-source {
    position: absolute; bottom: 8px; right: 8px; background: rgba(0,0,0,0.55); color: #fff;
    font-size: 10px; padding: 2px 6px; border-radius: 5px; z-index: 2;
}

.btn-link {
    display: inline-block; text-align: center; background: #e3f2fd; color: var(--primary-dark);
    text-decoration: none; padding: 9px; border-radius: 6px; font-size: 13px; font-weight: 600;
    transition: background .2s; margin-top: 5px;
}
.btn-link:hover { background: #bbdefb; }

/* ---- preferences ---- */
.pref-grid { display: grid; grid-template-columns: 1fr 260px; gap: 16px; }
@media (max-width: 800px) { .pref-grid { grid-template-columns: 1fr; } }
#prefInput {
    width: 100%; padding: 12px; border: 1px solid var(--border); border-radius: 8px;
    font-size: 14px; font-family: inherit; resize: vertical; outline: none;
}
#prefInput:focus { border-color: var(--primary); }
.pref-controls { display: flex; flex-direction: column; gap: 10px; }
.pref-status { font-size: 13px; color: var(--accent); font-weight: 500; }

/* ---- configuration ---- */
.config-grid { display: flex; flex-direction: column; gap: 16px; }
.config-section { border: 1px solid var(--border); border-radius: 8px; padding: 14px; background: #fafbfc; }
.config-section h3 { margin: 0 0 10px 0; font-size: 15px; color: var(--primary-dark); }
.retailer-checkboxes { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 10px; }
.retailer-checkboxes .check { display: flex; gap: 8px; align-items: center; font-size: 13.5px; font-weight: 500; }
.config-controls { display: flex; align-items: center; gap: 12px; margin-top: 10px; }
.config-status { font-size: 13px; color: var(--accent); font-weight: 500; }

/* ---- image modal zoom ---- */
.image-modal {
    display: none;
    position: fixed;
    z-index: 2000;
    padding-top: 50px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
    align-items: center;
    justify-content: center;
}
.image-modal-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 85%;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    animation: zoomIn 0.2s ease-out;
}
@keyframes zoomIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}
.image-modal-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
}
.image-modal-close:hover,
.image-modal-close:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}

@media (max-width: 640px) {
    body { padding: 10px; }
    .filter-bar { padding: 14px; }
    h1 { font-size: 22px; }
}