/* ── Design tokens ───────────────────────────────────────── */
:root {
  /* Surfaces */
  --bg:          #f1f5f9;
  --surface:     #ffffff;
  --surface-alt: #f8fafc;
  --panel:       #ffffff;

  /* Borders */
  --border: #e2e8f0;
  --line:   #e2e8f0;

  /* Text */
  --text:       #0f172a;
  --ink:        #0f172a;
  --muted:      #64748b;
  --text-muted: #64748b;

  /* Brand / Accent */
  --accent:        #0d9488;
  --accent-strong: #0f766e;
  --soft:          #f0fdfa;

  /* Status */
  --warn: #dc2626;

  /* Sidebar */
  --sidebar-bg:     #0f172a;
  --sidebar-muted:  #64748b;
  --sidebar-active: #f1f5f9;

  /* Elevation */
  --shadow:    0 1px 3px rgba(15,23,42,.08), 0 1px 2px rgba(15,23,42,.04);
  --shadow-md: 0 4px 12px rgba(15,23,42,.1);
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
}
button, input, select, textarea { font: inherit; }
a { color: inherit; text-decoration: none; }

/* ── Typography ──────────────────────────────────────────── */
h1 { font-size: 22px; font-weight: 700; margin: 0 0 2px; letter-spacing: -.3px; }
h2 { font-size: 15px; font-weight: 600; margin: 0; letter-spacing: -.1px; }
h3 { font-size: 13px; font-weight: 600; margin: 12px 0 6px; }
p  { margin: 0; color: var(--muted); line-height: 1.5; font-size: 13px; }

/* ── Buttons ─────────────────────────────────────────────── */
button {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 6px;
  padding: 7px 13px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: background .12s, border-color .12s, color .12s;
  white-space: nowrap;
}
button:hover { background: var(--surface-alt); border-color: #cbd5e1; }

.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
.primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); }

.ghost {
  background: transparent;
  border-color: transparent;
  color: var(--muted);
}
.ghost:hover { background: var(--surface-alt); border-color: var(--border); color: var(--text); }

.danger {
  color: var(--warn);
  border-color: #fca5a5;
  background: #fff;
}
.danger:hover { background: #fef2f2; }

/* ── Form controls ───────────────────────────────────────── */
input, select, textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  padding: 8px 10px;
  min-height: 38px;
  font-size: 13px;
  transition: border-color .12s, box-shadow .12s;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(13,148,136,.12);
}
textarea { resize: vertical; min-height: 72px; line-height: 1.5; }
label {
  display: grid;
  gap: 5px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar {
  min-height: 100vh;
  background: var(--sidebar-bg);
  padding: 18px 12px 20px;
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow-y: auto;
}
.brand {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 0 4px;
  margin-bottom: 24px;
  flex-shrink: 0;
}
.brand strong { color: #f1f5f9; font-size: 14px; }
.brand span {
  display: block;
  color: var(--sidebar-muted);
  font-size: 11px;
  margin-top: 1px;
}
.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  font-size: 13px;
  flex-shrink: 0;
}
.nav { display: grid; gap: 2px; }
.nav button {
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  color: var(--sidebar-muted);
  padding: 9px 10px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
}
.nav button:hover { background: rgba(255,255,255,.07); color: #e2e8f0; border-color: transparent; }
.nav button.active {
  background: rgba(255,255,255,.1);
  color: var(--sidebar-active);
  font-weight: 600;
  border-color: transparent;
}
.user-box {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid rgba(255,255,255,.08);
  display: grid;
  gap: 3px;
  flex-shrink: 0;
}
.user-box span {
  display: block;
  color: var(--sidebar-muted);
  font-size: 11px;
}
.user-box strong { color: #e2e8f0; font-size: 13px; }
.user-box small { color: var(--sidebar-muted); font-size: 11px; }
.user-box button {
  margin-top: 6px;
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.1);
  color: var(--sidebar-muted);
  font-size: 12px;
  padding: 6px 10px;
}
.user-box button:hover { background: rgba(255,255,255,.12); color: #e2e8f0; border-color: rgba(255,255,255,.18); }

/* ── App shell ───────────────────────────────────────────── */
.app { min-width: 0; padding: 20px 24px; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 20px;
}
.searchbar {
  display: grid;
  grid-template-columns: minmax(200px, 320px) 160px;
  gap: 8px;
}

/* ── Page / Panel ────────────────────────────────────────── */
.page { display: none; }
.page.active { display: block; }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  box-shadow: var(--shadow);
}
.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

/* ── Metrics ─────────────────────────────────────────────── */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(100px, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}
.metrics .metric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 16px;
  text-align: left;
  display: block;
  cursor: pointer;
  transition: box-shadow .15s, border-color .15s;
}
.metrics .metric-card:hover { border-color: var(--accent); box-shadow: var(--shadow-md); }
.metrics span { display: block; font-size: 26px; font-weight: 700; color: var(--text); letter-spacing: -.5px; }
.metrics small { color: var(--muted); font-size: 12px; font-weight: 500; }

/* ── Dashboard category cards ────────────────────────────── */
.dashboard-category-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}
.dashboard-category-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 8px;
  transition: box-shadow .15s, border-color .15s;
}
.dashboard-category-card:hover { border-color: var(--accent); box-shadow: var(--shadow-md); }
.category-card-main {
  border: 0;
  background: transparent;
  padding: 0;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: baseline;
  text-align: left;
}
.category-card-main strong { font-size: 14px; font-weight: 600; }
.category-card-main span,
.category-card-details span,
.subcategory-links span { color: var(--muted); font-size: 12px; }
.category-card-details { display: grid; gap: 3px; }
.subcategory-links { display: flex; gap: 6px; flex-wrap: wrap; }
.subcategory-links button { padding: 5px 8px; font-size: 12px; }

/* ── Split layout ────────────────────────────────────────── */
.split {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 12px;
}

/* ── Product grid ────────────────────────────────────────── */
.product-grid { display: grid; grid-template-columns: 1fr; gap: 10px; }
.product-grid.compact { grid-template-columns: 1fr; }

.catalog-head {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 14px 16px;
  margin-bottom: 12px;
  display: grid;
  gap: 12px;
}
.catalog-actions { display: grid; gap: 8px; }
.catalog-actions > a,
.catalog-actions .button-row { width: max-content; }
.category-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.category-chips button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  font-size: 12px;
  background: var(--surface-alt);
  border-radius: 6px;
}
.category-chips button.active {
  background: var(--soft);
  border-color: var(--accent);
  color: var(--accent-strong);
  font-weight: 600;
}
.category-chips span { color: var(--muted); font-size: 11px; }

/* ── Product card ────────────────────────────────────────── */
.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(110px, 160px) minmax(0, 1fr);
  box-shadow: var(--shadow);
  transition: box-shadow .15s, border-color .15s;
}
.product-card:hover { border-color: #cbd5e1; box-shadow: var(--shadow-md); }
.product-card .photo, .detail-photo {
  min-height: 120px;
  background: linear-gradient(145deg, #f1f5f9, #e2e8f0);
  display: grid;
  place-items: center;
  color: #64748b;
  font-weight: 700;
  font-size: 12px;
}
.product-card img, .detail-photo img { width: 100%; height: 100%; object-fit: cover; }
.detail-photo { min-height: 260px; }
.detail-photo img { object-fit: contain; padding: 12px; }
.product-model-title { color: var(--text); font-weight: 700; line-height: 1.25; }
.product-card .body { padding: 14px; display: grid; gap: 8px; align-content: start; }
.tag-row { display: flex; flex-wrap: wrap; gap: 5px; }
.tag {
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  background: var(--surface-alt);
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 500;
}
.tag.hot, .tag.new {
  border-color: #5eead4;
  color: var(--accent-strong);
  background: var(--soft);
}
.card-actions { display: flex; gap: 7px; margin-top: 2px; }
.mini-price { font-size: 12px; font-weight: 600; color: var(--accent-strong); }

/* ── Photo controls ──────────────────────────────────────── */
.photo-control { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.photo-preview {
  width: 88px; height: 68px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface-alt);
  display: grid; place-items: center;
  color: var(--muted); font-size: 11px;
  overflow: hidden;
}
.photo-preview img { width: 100%; height: 100%; object-fit: contain; }
.check-row { display: flex; align-items: center; gap: 7px; font-size: 12px; }

/* ── List items & admin rows ─────────────────────────────── */
.list { display: grid; gap: 7px; }
.list-item, .admin-row {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  transition: border-color .12s;
}
.list-item strong, .admin-row strong { display: block; font-size: 13px; font-weight: 600; }
.list-item span, .admin-row span { color: var(--muted); font-size: 12px; }
.admin-row:hover { border-color: #cbd5e1; }
.admin-row.editing {
  border-color: var(--accent);
  background: var(--soft);
}
.admin-row.editing strong { color: var(--accent-strong); }
@keyframes form-flash {
  0%   { box-shadow: 0 0 0 3px rgba(13,148,136,.25); }
  100% { box-shadow: var(--shadow); }
}
.panel.form-flash { animation: form-flash .6s ease-out forwards; }
.row-actions { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }

/* ── Empty states ────────────────────────────────────────── */
.detail-empty, .summary-empty {
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 48px;
  text-align: center;
  color: var(--muted);
  background: var(--surface);
  font-size: 13px;
}

/* ── Detail page layout (nav + view) ─────────────────────── */
.detail-page-layout {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}
.detail-nav {
  position: sticky;
  top: 20px;
  max-height: calc(100vh - 110px);
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
}
.dnav-group + .dnav-group { border-top: 1px solid var(--border); }
.dnav-category {
  font-size: 10px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: var(--muted);
  padding: 9px 10px 5px;
}
.dnav-item {
  display: block; width: 100%; text-align: left;
  padding: 6px 10px; border: none; border-radius: 0;
  background: transparent; cursor: pointer; color: var(--text);
  transition: background .1s;
}
.dnav-item:hover { background: var(--surface-alt); border-color: transparent; }
.dnav-item.active { background: var(--soft); border-color: transparent; }
.dnav-model {
  display: block; font-size: 12px; font-weight: 600;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.dnav-item.active .dnav-model { color: var(--accent); }
.dnav-name {
  display: block; font-size: 10px; color: var(--muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 1px;
}
.dnav-empty { padding: 16px 10px; color: var(--muted); font-size: 12px; }

/* ── Product detail ──────────────────────────────────────── */
.detail-layout {
  display: grid;
  grid-template-columns: minmax(240px, 380px) minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}
.detail-main {
  position: sticky;
  top: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.detail-main .body { padding: 16px; }
.detail-photo { min-height: 320px; }
.detail-sections { display: grid; gap: 10px; }
.product-name-sub { color: var(--muted); font-size: 13px; margin: 2px 0 10px; }
.detail-short-desc {
  font-size: 13px; line-height: 1.55; margin: 8px 0 10px;
  padding: 8px 10px; background: var(--surface-alt);
  border-radius: 6px; border-left: 3px solid var(--accent);
  color: var(--text);
}
.detail-kv { margin: 10px 0 4px; }
.detail-kv td:first-child {
  text-transform: uppercase; font-size: 10px;
  font-weight: 700; letter-spacing: .06em; color: var(--muted); width: 42%;
}
.detail-edit-btn { padding: 4px 9px; font-size: 11px; }

/* ── Selling points / highlights ─────────────────────────── */
.selling-points-list {
  margin: 8px 0 0; padding-left: 20px;
  display: grid; gap: 5px;
}
.selling-points-list li { font-size: 13px; line-height: 1.5; color: var(--text); }

/* ── Tables ──────────────────────────────────────────────── */
.kv, .tier-table {
  width: 100%;
  border-collapse: collapse;
}
.kv td, .tier-table td, .tier-table th {
  border-bottom: 1px solid var(--border);
  padding: 9px 8px;
  text-align: left;
  vertical-align: top;
  font-size: 13px;
}
.kv td:first-child { color: var(--muted); font-size: 12px; width: 38%; }
.tier-table th {
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.module-detail-table td:nth-child(2) small { display: block; margin-top: 3px; color: var(--muted); line-height: 1.35; }
.module-detail-table td:nth-child(6) { min-width: 220px; }
.module-tier-row { display: block; white-space: nowrap; font-size: 12px; }

/* ── Specs table ─────────────────────────────────────────── */
.specs-header { font-size: 13px; font-weight: 600; margin: 10px 0 4px; color: var(--text); }
.specs-kv td:first-child { font-weight: 500; width: 38%; }

/* ── Tier table grade labels ─────────────────────────────── */
.pl-tier-grade { display: block; font-weight: 700; font-size: 11px; }
.pl-tier-rule { display: block; font-size: 10px; color: var(--muted); margin-top: 2px; font-weight: 400; text-transform: none; letter-spacing: 0; }

/* ── Detail accessories ──────────────────────────────────── */
.detail-accessory-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 7px;
}
.detail-accessory-grid label {
  display: flex; align-items: flex-start; gap: 9px;
  border: 1px solid var(--border); border-radius: 8px; padding: 10px;
  color: var(--text); font-weight: 400; font-size: 13px;
  text-transform: none; letter-spacing: 0;
  transition: border-color .12s;
}
.detail-accessory-grid label:hover { border-color: var(--accent); }
.detail-accessory-grid input { width: auto; min-height: auto; margin-top: 2px; }
.detail-accessory-grid span { display: grid; gap: 3px; }
.detail-accessory-grid small { color: var(--muted); line-height: 1.35; font-size: 11px; }
.acc-price { font-size: 12px; font-weight: 600; color: var(--accent); }
.acc-remark { display: block; font-size: 11px; color: var(--muted); font-style: italic; line-height: 1.4; }

/* ── Detail edit form ────────────────────────────────────── */
.detail-edit-form { display: grid; gap: 10px; margin-top: 12px; }

/* ── Builder ─────────────────────────────────────────────── */
.builder-layout {
  display: grid;
  grid-template-columns: minmax(320px, 1.1fr) minmax(280px, .9fr);
  gap: 12px;
}
.quote-form, .stacked { display: grid; gap: 10px; }
.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
}
.check-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 7px;
}
.check-grid label {
  display: flex; align-items: flex-start; gap: 8px;
  font-weight: 400; color: var(--text); font-size: 13px;
  text-transform: none; letter-spacing: 0;
  border: 1px solid var(--border); border-radius: 7px; padding: 8px;
}
.check-grid input { width: auto; min-height: auto; margin-top: 2px; }

/* ── Accessory sections ──────────────────────────────────── */
.accessory-search-bar { margin-bottom: 10px; }
.accessory-search-bar input {
  width: 100%; max-width: 360px;
  padding: 7px 11px; font-size: 13px;
  border: 1px solid var(--border); border-radius: 6px;
  background: var(--surface); color: var(--text);
}
.accessory-section { display: grid; gap: 6px; }
.accessory-section + .accessory-section { margin-top: 10px; }
.accessory-section h4 {
  margin: 0; font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: .06em; color: var(--muted);
}
.accessory-subsection { display: grid; gap: 4px; margin-top: 8px; }
.accessory-subsection h5 {
  margin: 0; font-size: 11px; font-weight: 600;
  color: var(--muted); padding-left: 2px;
}

/* ── Quote line table ────────────────────────────────────── */
.quote-line-table-wrap {
  border: 1px solid var(--border); border-radius: 8px;
  overflow: auto; max-height: 340px; background: var(--surface);
}
.quote-line-table { width: 100%; min-width: 700px; border-collapse: collapse; }
.quote-line-table th {
  position: sticky; top: 0; z-index: 1;
  background: var(--surface-alt);
  color: var(--muted); font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: .04em;
  text-align: left; border-bottom: 1px solid var(--border); padding: 8px;
}
.quote-line-table td { border-bottom: 1px solid var(--border); padding: 8px; vertical-align: middle; font-size: 13px; }
.quote-line-table tr:last-child td { border-bottom: 0; }
.quote-line-table tr.selected { background: var(--soft); }
.quote-line-table td:first-child,
.quote-line-table th:first-child { width: 44px; text-align: center; }
.quote-line-table td:nth-child(2) { min-width: 300px; }
.quote-line-table strong { display: block; line-height: 1.25; word-break: normal; overflow-wrap: anywhere; font-size: 13px; }
.quote-line-table small { color: var(--muted); display: block; margin-top: 2px; line-height: 1.3; font-size: 11px; }
.quote-line-table input[type="checkbox"] { width: auto; min-height: auto; }
.quote-line-table input[type="number"] { min-height: 32px; padding: 5px 8px; min-width: 80px; }
.empty-note { border: 1px solid var(--border); border-radius: 8px; padding: 10px; font-size: 13px; color: var(--muted); }

.module-multiplier { display: block; color: var(--accent-strong); font-weight: 600; margin-top: 3px; font-size: 12px; }
.quote-line-table tr.module-required td:first-child { border-left: 3px solid var(--accent); }
.quote-line-table tr.module-optional td:first-child { border-left: 3px solid transparent; }

/* ── Price breakdown ─────────────────────────────────────── */
.price-card { display: grid; gap: 10px; }
.grade-ladder {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 7px;
}
.grade-ladder button {
  display: grid; gap: 3px; text-align: left;
  padding: 10px 11px; min-height: 62px;
  background: var(--surface-alt);
  border-radius: 8px;
  transition: background .12s, border-color .12s;
}
.grade-ladder button.active {
  border-color: var(--accent);
  background: var(--soft);
  box-shadow: inset 0 0 0 1px var(--accent);
}
.grade-ladder strong { font-size: 12px; line-height: 1.25; font-weight: 600; }
.grade-ladder span { color: var(--muted); font-size: 11px; }
.price-line {
  display: flex; justify-content: space-between; align-items: center;
  border-bottom: 1px solid var(--border); padding: 8px 0;
  font-size: 13px;
}
.price-line:first-child { padding-top: 0; }
.accessory-line span { max-width: 70%; }
.price-total {
  background: var(--soft); border: 1px solid #5eead4;
  border-radius: 8px; padding: 14px 16px;
  display: flex; justify-content: space-between; align-items: center;
  gap: 14px; font-size: 18px; font-weight: 700;
}
.price-total span { display: grid; gap: 2px; }
.price-total small { color: var(--muted); font-size: 11px; font-weight: 400; }

/* ── Summary ─────────────────────────────────────────────── */
.summary-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; max-width: 880px; margin: 0 auto;
  padding: 24px; box-shadow: var(--shadow);
}
.summary-title {
  display: flex; justify-content: space-between; gap: 16px;
  border-bottom: 2px solid var(--text); padding-bottom: 14px; margin-bottom: 16px;
}
.summary-actions { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }

/* ── Quote sheet ─────────────────────────────────────────── */
.quote-sheet-bar { margin-top: 10px; border-top: 1px solid var(--border); padding-top: 10px; }
.quote-sheet-count { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; min-height: 28px; }
.sheet-badge {
  background: var(--accent); color: #fff; font-size: 12px; font-weight: 600;
  padding: 3px 10px; border-radius: 20px;
}
.sheet-clear-btn { font-size: 12px; color: var(--muted); }
.quote-sheet-items { display: grid; gap: 4px; margin-top: 6px; }
.sheet-item-row {
  display: flex; align-items: center; gap: 8px; font-size: 13px;
  background: var(--surface-alt); border: 1px solid var(--border);
  border-radius: 6px; padding: 4px 8px;
}
.sheet-item-num { width: 18px; text-align: center; color: var(--muted); font-size: 11px; }
.sheet-item-model { font-weight: 600; flex: 1; }
.sheet-item-qty { color: var(--muted); font-size: 12px; }
.sheet-item-price { font-size: 12px; color: var(--accent); }
.sheet-remove-btn { margin-left: auto; font-size: 11px; color: var(--muted); padding: 0 4px; }
.sheet-table th, .sheet-table td { font-size: 12px; }

/* ── Quote history ───────────────────────────────────────── */
.history-panel {
  margin-top: 20px; background: var(--surface);
  border: 1px solid var(--border); border-radius: 10px;
  padding: 16px 18px; box-shadow: var(--shadow);
}
.history-list { display: grid; gap: 6px; margin-top: 10px; }
.history-loading { color: var(--muted); font-size: 13px; padding: 8px 0; }
.history-row {
  display: grid; grid-template-columns: 1fr auto auto;
  gap: 12px; align-items: center;
  padding: 10px 12px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface);
  transition: background .12s, border-color .12s;
}
.history-row:hover { background: var(--surface-alt); border-color: #cbd5e1; }
.history-info { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.history-info strong { font-size: 13px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.history-info span { font-size: 12px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.history-info small { font-size: 11px; color: var(--muted); }
.history-amounts { display: flex; flex-direction: column; align-items: flex-end; gap: 2px; white-space: nowrap; }
.history-amounts span { font-size: 13px; font-weight: 600; }
.history-amounts small { font-size: 11px; color: var(--muted); }
.history-date { font-size: 11px; color: var(--muted); }
.history-actions { display: flex; align-items: center; }

/* ── Admin layout ────────────────────────────────────────── */
.admin-layout {
  display: grid;
  grid-template-columns: minmax(230px, .75fr) minmax(340px, 1.25fr);
  gap: 12px;
}
.admin-layout .panel:nth-child(3) { grid-column: 1 / -1; }
.admin-layout .panel:nth-child(4) { grid-column: 1 / -1; }
.admin-list { display: grid; gap: 7px; }
.button-row { display: flex; gap: 8px; flex-wrap: wrap; }
.checkbox-line {
  display: flex; align-items: center; gap: 8px;
  align-self: end; min-height: 38px; font-size: 13px;
  font-weight: 400; text-transform: none; letter-spacing: 0; color: var(--text);
}
.checkbox-line input { width: auto; min-height: auto; }

/* ── Tier editor ─────────────────────────────────────────── */
.tier-editor-wrap { display: grid; gap: 5px; }
.tier-editor-wrap > span {
  font-size: 11px; font-weight: 600;
  letter-spacing: .04em; text-transform: uppercase; color: var(--muted);
}
.tier-editor {
  border: 1px solid var(--border); border-radius: 8px;
  padding: 12px; display: grid; gap: 7px; background: var(--surface);
}
.tier-editor-head, .tier-editor-row {
  display: grid;
  grid-template-columns: 96px 130px 1fr 32px;
  gap: 7px; align-items: center;
}
.tier-editor-head {
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  letter-spacing: .04em; color: var(--muted); padding: 0 2px;
}
.tier-editor-row input { min-height: 32px; padding: 4px 8px; }
.tier-label { font-size: 12px; color: var(--accent-strong); line-height: 1.3; }
.tier-remove { padding: 4px 7px; font-size: 13px; line-height: 1; }

/* ── Accessory visibility ────────────────────────────────── */
.accessory-visibility-box {
  border: 1px solid var(--border); border-radius: 8px;
  padding: 12px; display: grid; gap: 8px;
}
.visibility-list {
  display: grid; gap: 6px; max-height: 300px; overflow: auto;
}
.visibility-list label {
  display: flex; align-items: flex-start; gap: 8px;
  border: 1px solid var(--border); border-radius: 7px; padding: 8px;
  color: var(--text); font-weight: 400; font-size: 13px;
  text-transform: none; letter-spacing: 0;
  transition: border-color .12s;
}
.visibility-list label:hover { border-color: var(--accent); }
.visibility-list input { width: auto; min-height: auto; margin-top: 3px; }
.visibility-list span { display: grid; gap: 2px; }
.visibility-list small { color: var(--muted); font-size: 11px; }

/* ── Login ───────────────────────────────────────────────── */
.login-screen {
  position: fixed; inset: 0; z-index: 20;
  display: grid; place-items: center;
  background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
  padding: 20px;
}
.login-screen.hidden { display: none; }
.login-card {
  width: min(400px, 100%); display: grid; gap: 14px;
  background: var(--surface);
  border: 1px solid var(--border); border-radius: 12px;
  box-shadow: 0 8px 32px rgba(15,23,42,.12);
  padding: 28px;
}
.login-brand { margin-bottom: 6px; }

/* ── Two-factor auth ─────────────────────────────────────── */
.twofa-hint {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
  line-height: 1.5;
}
.twofa-hint strong { color: var(--text); }
.twofa-error {
  font-size: 13px;
  color: var(--warn);
  margin: 0;
  min-height: 1.4em;
}
.twofa-send-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

/* ── Toast ───────────────────────────────────────────────── */
#toast {
  position: fixed; right: 16px; bottom: 16px;
  padding: 10px 14px; border-radius: 8px;
  background: var(--text); color: #fff;
  font-size: 13px; font-weight: 500;
  opacity: 0; pointer-events: none;
  transition: opacity .18s ease;
  max-width: 340px;
  box-shadow: 0 4px 16px rgba(0,0,0,.2);
}
#toast.show { opacity: 1; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  body { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    min-height: auto;
    height: auto;
    padding: 14px 12px;
    overflow-y: visible;
  }
  .sidebar .brand { margin-bottom: 12px; }
  .nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .user-box { margin-top: 12px; }
  .topbar, .split, .detail-layout, .builder-layout, .admin-layout {
    grid-template-columns: 1fr;
    display: grid;
  }
  .searchbar { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .admin-layout .panel:nth-child(3),
  .admin-layout .panel:nth-child(4) { grid-column: auto; }
}

/* ── Pricelist table (Products page) ────────────────────── */
.pricelist-wrap { overflow-x: auto; }
.pricelist-table {
  width: 100%; border-collapse: collapse;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; overflow: hidden;
  box-shadow: var(--shadow); font-size: 13px;
}
.pricelist-table thead { background: var(--surface-alt); }
.pl-head-row th, .pl-sub-row th {
  padding: 8px 10px; text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: .04em; color: var(--muted);
  white-space: nowrap;
}
.pl-tier-head {
  text-align: center !important;
  background: var(--soft); color: var(--accent-strong) !important;
  border-left: 1px solid var(--border);
}
.pl-sub { text-align: center !important; font-size: 10px !important; border-left: 1px solid var(--border); }
.pl-row { border-bottom: 1px solid var(--border); transition: background .1s; cursor: pointer; }
.pl-row:last-child { border-bottom: 0; }
.pl-row:hover { background: var(--surface-alt); }
.pl-num { width: 36px; color: var(--muted); font-size: 12px; padding: 10px 8px; text-align: center; }
.pl-photo { width: 60px; padding: 6px 8px; }
.pl-photo .photo {
  width: 52px; height: 44px; border-radius: 5px;
  background: linear-gradient(145deg, #f1f5f9, #e2e8f0);
  display: grid; place-items: center; font-size: 10px;
  color: var(--muted); font-weight: 600; overflow: hidden;
}
.pl-photo img { width: 52px; height: 44px; object-fit: cover; border-radius: 5px; }
.pl-model { padding: 10px 8px; white-space: nowrap; }
.pl-model strong { display: block; font-size: 13px; margin-bottom: 3px; }
.pl-desc { padding: 10px 8px; color: var(--muted); font-size: 12px; max-width: 260px; line-height: 1.4; }
.pl-price-rmb, .pl-price-usd, .pl-empty-tier {
  padding: 10px 8px; text-align: right; white-space: nowrap;
  font-size: 12px; border-left: 1px solid var(--border);
}
.pl-price-rmb { font-weight: 600; color: var(--text); }
.pl-price-usd { color: var(--muted); }
.pl-actions { padding: 8px; white-space: nowrap; }
.pl-actions-head { text-align: center !important; }

/* Product card tier row (dashboard / compact views) */
.pl-tier-row { border-collapse: collapse; width: 100%; margin-top: 2px; }
.pl-tier-cell { padding: 4px 8px 4px 0; vertical-align: top; min-width: 80px; border-right: 1px solid var(--border); }
.pl-tier-cell:last-child { border-right: 0; }
.pl-tier-qty { font-size: 10px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.pl-tier-rmb { font-size: 12px; font-weight: 600; color: var(--text); line-height: 1.3; }
.pl-tier-usd { font-size: 11px; color: var(--muted); }

/* Horizontal tier table (Product Detail) */
.pricelist-tier-table { background: var(--surface); }
.pricelist-tier-table thead th { background: var(--soft); border-bottom: 2px solid var(--accent); }
.pricelist-tier-table .pl-tier-head { font-size: 12px; font-weight: 700; padding: 10px 14px; }
.pricelist-tier-table .pl-tier-label { color: var(--muted); font-size: 12px; font-weight: 600; padding: 9px 10px; white-space: nowrap; }
.pricelist-tier-table .pl-price-rmb { font-size: 14px; font-weight: 700; padding: 9px 14px; border-left: 1px solid var(--border); }
.pricelist-tier-table .pl-price-usd { font-size: 13px; color: var(--muted); padding: 9px 14px; border-left: 1px solid var(--border); }

/* ── Quotation document (Summary page) ──────────────────── */
.quote-doc-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 20px; padding-bottom: 16px; margin-bottom: 16px;
  border-bottom: 2px solid var(--text);
}
.quote-doc-brand { display: flex; align-items: center; gap: 12px; }
.quote-doc-brand .brand-mark {
  width: 40px; height: 40px; border-radius: 8px;
  display: grid; place-items: center;
  background: var(--accent); color: #fff;
  font-weight: 800; font-size: 14px;
}
.quote-doc-brand strong { display: block; font-size: 18px; font-weight: 700; letter-spacing: -.3px; }
.quote-doc-brand span { font-size: 11px; color: var(--muted); }
.quote-doc-meta { display: flex; gap: 24px; align-items: flex-start; }
.quote-doc-meta > div { display: flex; flex-direction: column; gap: 2px; text-align: right; }
.quote-doc-meta span { font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.quote-doc-meta strong { font-size: 13px; }
.quote-doc-product { margin-bottom: 16px; }
.quote-doc-section-title {
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  letter-spacing: .06em; color: var(--muted);
  margin: 20px 0 8px; padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.quote-doc-table {
  width: 100%; border-collapse: collapse;
  font-size: 13px; margin-bottom: 4px;
}
.quote-doc-table th {
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border);
  padding: 8px 10px; text-align: left;
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: .04em; color: var(--muted);
}
.quote-doc-table td { padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.quote-doc-table tr:last-child td { border-bottom: 0; }
.quote-doc-table tfoot td {
  background: var(--surface-alt);
  border-top: 2px solid var(--border); border-bottom: 0;
  font-weight: 600;
}
.quote-doc-table .num { text-align: right; white-space: nowrap; }
.quote-doc-table .total-label { color: var(--muted); font-size: 12px; }
.quote-doc-table .total-val { color: var(--accent-strong); font-weight: 700; }
.quote-price-table {
  width: 100%; border-collapse: collapse;
  font-size: 13px; margin-bottom: 4px;
  border: 1px solid var(--border); border-radius: 8px; overflow: hidden;
}
.quote-price-table th {
  background: var(--surface-alt); border-bottom: 1px solid var(--border);
  padding: 8px 14px; font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: .04em; color: var(--muted);
}
.quote-price-table td { padding: 10px 14px; border-bottom: 1px solid var(--border); }
.quote-price-table tr:last-child td { border-bottom: 0; }
.quote-price-table .num { text-align: right; font-variant-numeric: tabular-nums; }
.quote-total-row td { background: var(--soft); font-weight: 600; }

/* ── Quotation breakdown table ───────────────────────────── */
.price-card-header { display: flex; flex-direction: column; gap: 8px; margin-bottom: 10px; }
.quote-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.quote-breakdown-table {
  width: 100%; border-collapse: collapse; font-size: 12px;
  border: 1px solid var(--border); border-radius: 8px; overflow: hidden;
  min-width: 640px;
}
.quote-breakdown-table th {
  background: var(--surface-alt); border-bottom: 1px solid var(--border);
  padding: 7px 10px; font-size: 10px; font-weight: 700;
  text-transform: uppercase; letter-spacing: .04em; color: var(--muted);
  white-space: nowrap;
}
.quote-breakdown-table td { padding: 7px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.quote-breakdown-table tr:last-child td { border-bottom: 0; }
.quote-breakdown-table .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.quote-subtotal-row td { background: var(--soft); font-size: 11px; }
.quote-grand-total-row td { background: var(--accent); color: #fff; font-size: 13px; padding: 9px 10px; }
.quote-grand-total-row .num { color: #fff; }
.quote-section-header td {
  background: var(--surface-alt); font-size: 10px; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase; color: var(--muted);
  padding: 5px 10px; border-bottom: 1px solid var(--border);
}
.muted-text { color: var(--muted); font-size: 11px; }

/* ── Quote product header (summary page) ─────────────────── */
.quote-product-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 16px; margin-bottom: 16px; padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.quote-product-info { flex: 1; min-width: 0; }
.quote-product-model { font-size: 18px; font-weight: 700; margin: 0 0 2px; color: var(--text); }
.quote-product-name { font-size: 13px; color: var(--muted); margin: 0 0 6px; }
.quote-product-desc {
  font-size: 12px; color: var(--text); margin: 0 0 8px;
  border-left: 3px solid var(--accent); padding-left: 8px;
  line-height: 1.5;
}
.quote-product-meta { display: flex; flex-wrap: wrap; gap: 12px; font-size: 12px; color: var(--muted); }
.quote-product-meta strong { color: var(--text); }
.quote-product-photo { width: 120px; height: 90px; object-fit: contain; border-radius: 6px; border: 1px solid var(--border); flex-shrink: 0; }

/* ── Remarks & terms ─────────────────────────────────────── */
.quote-remarks-list { margin: 8px 0 0; padding-left: 18px; display: grid; gap: 4px; }
.quote-remarks-list li { font-size: 13px; color: var(--text); line-height: 1.5; }
.quote-terms-table { margin-top: 4px; }

/* ── Print ───────────────────────────────────────────────── */
@media print {
  body { display: block; background: #fff; }
  .sidebar, .topbar, .summary-actions, .history-panel, #toast { display: none; }
  .app { padding: 0; }
  .page { display: none !important; }
  #summary { display: block !important; }
  .summary-card { border: 0; box-shadow: none; max-width: none; border-radius: 0; }
}