/* =====================================================================
   VLS Product Comparison — compare.css
   Floating comparison bar + compare page table
   ===================================================================== */

/* ── Compare toggle button on product cards ──────────────────────────── */
.vls-compare-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--border-1);
  border-radius: var(--r-1);
  background: var(--bg-surface);
  color: var(--fg-3);
  cursor: pointer;
  transition: all var(--dur-fast);
  flex-shrink: 0;
}
.vls-compare-toggle:hover {
  border-color: #1F3355;
  color: #1F3355;
  background: #ECEFF4;
}
.vls-compare-toggle.is-added {
  border-color: #0E8F4A;
  color: #0E8F4A;
  background: #DCFCE7;
}

/* ── Floating comparison bar ─────────────────────────────────────────── */
#vls-compare-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: #0D1832;
  border-top: 3px solid #FFC107;
  padding: 0 20px;
  transform: translateY(100%);
  transition: transform .25s cubic-bezier(.4,0,.2,1);
  box-shadow: 0 -4px 24px rgba(0,0,0,.25);
}
#vls-compare-bar.is-visible {
  transform: translateY(0);
}
.compare-bar__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
}
.compare-bar__slots {
  display: flex;
  gap: 10px;
  flex: 1;
}
.compare-bar__slot {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 200px;
  background: rgba(255,255,255,.08);
  border: 1px dashed rgba(255,255,255,.2);
  border-radius: 8px;
  padding: 8px 12px;
  min-height: 52px;
}
.compare-bar__slot.is-empty {
  justify-content: center;
  color: rgba(255,255,255,.3);
  font-family: var(--font-body);
  font-size: 12px;
  cursor: default;
}
.compare-bar__slot-img {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  object-fit: cover;
  background: rgba(255,255,255,.1);
  flex-shrink: 0;
}
.compare-bar__slot-img-placeholder {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  background: rgba(255,255,255,.08);
  flex-shrink: 0;
}
.compare-bar__slot-name {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  flex: 1;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-height: 1.3;
}
.compare-bar__slot-del {
  background: none;
  border: none;
  cursor: pointer;
  color: rgba(255,255,255,.4);
  padding: 2px;
  flex-shrink: 0;
  transition: color var(--dur-fast);
}
.compare-bar__slot-del:hover { color: #FFC107; }
.compare-bar__label {
  font-family: var(--font-body);
  font-size: 12px;
  color: rgba(255,255,255,.5);
  white-space: nowrap;
}
.compare-bar__count {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: #FFC107;
}
.compare-bar__actions {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}
.compare-bar__clear {
  background: none;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 6px;
  color: rgba(255,255,255,.6);
  font-family: var(--font-body);
  font-size: 12px;
  padding: 8px 14px;
  cursor: pointer;
  transition: all var(--dur-fast);
}
.compare-bar__clear:hover { border-color: rgba(255,255,255,.5); color: #fff; }

/* ── Compare page ────────────────────────────────────────────────────── */
.cmp-page { padding: 48px 0 88px; background: var(--bg-body, #F7F7F5); }
.cmp-empty { text-align: center; padding: 100px 20px; }
.cmp-empty__icon { color: var(--fg-3); margin-bottom: 20px; }
.cmp-empty__title { font-family: var(--font-display); font-size: var(--fs-22); font-weight: 700; color: var(--fg-1); margin: 0 0 var(--sp-3); }
.cmp-empty__sub { font-family: var(--font-body); font-size: var(--fs-15); color: var(--fg-2); margin: 0 0 var(--sp-6); }

.cmp-table-wrap { overflow-x: auto; }
.cmp-table { width: 100%; border-collapse: collapse; background: var(--bg-surface); border-radius: var(--r-3); overflow: hidden; border: 1px solid var(--border-1); }
.cmp-table th, .cmp-table td { border-bottom: 1px solid var(--border-1); padding: 0; }

/* Product header row */
.cmp-th-label { background: #F0F4F9; padding: 16px 20px; font-family: var(--font-body); font-size: var(--fs-12); font-weight: 700; text-transform: uppercase; letter-spacing: .07em; color: var(--fg-3); width: 180px; min-width: 160px; }
.cmp-th-product { background: var(--bg-surface); padding: 20px 16px; text-align: center; min-width: 200px; max-width: 260px; vertical-align: top; }
.cmp-th-product img { width: 100%; height: 160px; object-fit: cover; border-radius: var(--r-2); margin-bottom: 12px; }
.cmp-th-product__no-img { width: 100%; height: 160px; background: #ECEFF4; border-radius: var(--r-2); display: flex; align-items: center; justify-content: center; color: var(--fg-3); margin-bottom: 12px; }
.cmp-th-product__name { font-family: var(--font-display); font-size: var(--fs-15); font-weight: 700; color: var(--fg-1); margin: 0 0 6px; line-height: 1.3; }
.cmp-th-product__name a { color: inherit; text-decoration: none; }
.cmp-th-product__name a:hover { color: #1F3355; text-decoration: underline; }
.cmp-th-product__brand { font-family: var(--font-body); font-size: var(--fs-12); color: var(--fg-3); margin: 0 0 10px; }
.cmp-th-product__remove { background: none; border: 1px solid var(--border-2); border-radius: var(--r-full); font-family: var(--font-body); font-size: 11px; color: var(--fg-3); padding: 4px 10px; cursor: pointer; transition: all var(--dur-fast); }
.cmp-th-product__remove:hover { border-color: var(--red, #C8321E); color: var(--red, #C8321E); }

/* Data rows */
.cmp-row-label { background: #F0F4F9; padding: 14px 20px; font-family: var(--font-body); font-size: var(--fs-13); font-weight: 600; color: var(--fg-1); vertical-align: top; }
.cmp-row-val { padding: 14px 16px; text-align: center; font-family: var(--font-body); font-size: var(--fs-13); color: var(--fg-1); vertical-align: top; }
.cmp-row-val--price { font-family: var(--font-mono); font-size: var(--fs-17); font-weight: 700; color: #0D1832; }
.cmp-row-val--best { background: #FFFBEB; }
.cmp-row-val--na { color: var(--fg-3); font-style: italic; }
.cmp-row-val .vls-sup-badge { margin: 0 auto; }
.cmp-delta-up { color: #C8321E; font-weight: 700; }
.cmp-delta-dn { color: #0E8F4A; font-weight: 700; }

/* CTA row at bottom */
.cmp-cta-row td { padding: 16px; }
.cmp-cta-row .cmp-row-label { background: var(--bg-surface); }

/* ── Responsive ──────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .compare-bar__slots { gap: 6px; }
  .compare-bar__slot { width: 150px; }
}
@media (max-width: 600px) {
  .compare-bar__slots { display: none; }
  #vls-compare-bar .compare-bar__inner { justify-content: space-between; }
  .cmp-th-label, .cmp-row-label { display: none; }
  .cmp-th-product, .cmp-row-val { min-width: 140px; }
}
@media (max-width: 400px) {
  .cmp-table-wrap { margin: 0 -16px; }
  .cmp-th-product, .cmp-row-val { min-width: 120px; padding: 10px 8px; }
  .cmp-th-product img { height: 120px; }
  .cmp-th-product__no-img { height: 120px; }
  .cmp-th-product__name { font-size: var(--fs-13); }
  .cmp-cta__btns { flex-direction: column; }
}

/* ── Print styles ────────────────────────────────────────────────────── */
@media print {
  #vls-compare-bar,
  .cmp-cta,
  .vls-header,
  .vls-footer,
  .cmp-th-product__remove { display: none !important; }

  .cmp-page { padding: 0; background: #fff; }
  .cmp-table { font-size: 10pt; border: 1px solid #ccc; }
  .cmp-th-product img { height: 100px; }
  .cmp-th-label, .cmp-row-label { display: table-cell !important; background: #f5f5f5; }
  .cmp-row-val--price { color: #000; }
}

/* ── So sánh: nhóm thông số kỹ thuật + tô khác biệt ── */
.cmp-spec-head td{background:var(--vls-ink,#0f2a43);color:#fff;font-weight:700;text-align:left;padding:8px 14px;font-size:.9em}
.cmp-row--diff .cmp-row-val{background:#fff7ed}
.cmp-row--diff .cmp-row-label{color:#b45309;font-weight:600}