/* ==========================================================================
   COMPONENTS — Cards, Buttons, Tables, Badges, Alerts
   ========================================================================== */

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  text-decoration: none;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background-color: var(--color-primary);
  color: #fff;
}
.btn--primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}

.btn--navy {
  background-color: #0b1736;
  color: #ffffff;
  border-radius: var(--radius-md);
  font-weight: var(--weight-bold);
  padding: var(--space-3) var(--space-8);
}
.btn--navy:hover {
  background-color: #2563eb;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn--amazon {
  background-color: var(--color-amazon);
  color: var(--color-amazon-dark);
  font-weight: var(--weight-bold);
  border-radius: var(--radius-full);
  padding: var(--space-3) var(--space-8);
}
.btn--amazon:hover {
  background-color: var(--color-amazon-hover);
  box-shadow: 0 4px 12px rgba(255, 153, 0, 0.35);
}
.btn--amazon svg { width: 18px; height: 18px; }

/* --- Section CTA Link (Matches Drawer Hover Exactly: #6B7280 Resting -> #1E3A8A Hover) --- */
.section-cta-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-text-secondary);
  background-color: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.section-cta-link .cta-arrow {
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

.section-cta-link:hover {
  background-color: rgba(30, 58, 138, 0.05);
  border-color: rgba(30, 58, 138, 0.1);
  color: var(--color-heading);
}

.section-cta-link:hover .cta-arrow {
  color: var(--color-heading);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-3);
}
.btn--ghost:hover {
  color: var(--color-text);
  background-color: var(--color-bg-alt);
}

.btn--lg { padding: var(--space-4) var(--space-8); font-size: var(--text-base); }
.btn--sm { padding: var(--space-2) var(--space-4); font-size: var(--text-xs); }

/* --- Cards --- */
.card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  will-change: transform, border-color, box-shadow;
}
.card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-light);
}

.card__image {
  position: relative;
  overflow: hidden;
  background-color: var(--color-bg-alt);
  aspect-ratio: 4 / 3;
}
.card__image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--space-6);
  transition: transform var(--transition-slow);
}
.card:hover .card__image img { transform: scale(1.03); }

.card__body { padding: var(--space-5); }

.card__category {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.card__title {
  color: var(--color-text);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: var(--color-text);
}
.card__title a {
  color: var(--color-text);
  transition: color var(--transition-fast);
}
.card__title a:hover { color: var(--color-primary); }

/* Custom CSS Tooltip for truncated titles only */
.grid .card.product-card {
  overflow: visible;
  position: relative;
  transform: translateZ(0);
}

.grid .card.product-card .card__image {
  margin: 1px 1px 0 1px;
  width: calc(100% - 2px);
  border-radius: calc(var(--radius-lg) - 1px) calc(var(--radius-lg) - 1px) 0 0;
  overflow: hidden;
}

/* Tooltip floating above card - Pre-allocated on all product cards for identical instant GPU layer composition */
.grid .card.product-card::after {
  content: attr(data-title);
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background-color: #1f2937;
  color: #ffffff;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: var(--weight-normal);
  line-height: 1.4;
  width: 90%;
  max-width: 320px;
  text-align: center;
  white-space: normal;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

/* Tooltip downward triangle arrow */
.grid .card.product-card::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 1px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-top: 10px solid #1f2937;
  z-index: 101;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.grid .card.product-card.is-truncated:hover::after,
.grid .card.product-card.is-truncated:hover::before,
.grid .card.product-card[data-truncated="true"]:hover::after,
.grid .card.product-card[data-truncated="true"]:hover::before {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}


.card__excerpt {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Icon Container — Minimalist Line Art Styling (Option B) */
.icon-container {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  height: auto;
  border-radius: 0;
  background-color: transparent;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  font-size: 40px; /* Controls SVG size */
  transition: color var(--transition-base);
}
.card:hover .icon-container {
  transform: none !important;
  background-color: transparent;
  color: var(--color-primary-hover);
}
.icon-container svg {
  width: 1em;
  height: 1em;
  transform: none !important;
  transition: none !important;
}

/* Category Directory Cards styling */
.category-card {
  height: 100%;
  border: 1px solid #e2e8f0;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.category-card:hover,
.trust-card:hover {
  transform: translateY(-4px);
  border-color: #93c5fd !important;
  box-shadow: 0 15px 30px -5px rgba(37, 99, 235, 0.08) !important;
}
.category-card .icon-container,
.category-card .icon-container svg,
.trust-card .icon-container,
.trust-card .icon-container svg {
  transition: none !important;
  transform: none !important;
}
.category-card__children a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  padding: 2px 0;
  text-decoration: none;
}
.category-card__children a:hover {
  color: var(--color-primary);
}
.category-card__children a:hover .link-chevron {
  color: var(--color-primary);
  transform: translateX(1px);
}
.category-card__children a .link-chevron {
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border-light);
}

.card__price { font-size: var(--text-xl); font-weight: var(--weight-bold); color: var(--color-text); }
.card__price-old { font-size: var(--text-sm); color: var(--color-text-muted); text-decoration: line-through; margin-left: var(--space-2); }

/* --- Product Card (extended) --- */
.product-card { position: relative; }

.product-card__badge {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 10;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.product-card__badge--top-pick { background-color: var(--color-accent); color: var(--color-amazon-dark); }
.product-card__badge--best-value { background-color: var(--color-success); color: #fff; }
.product-card__badge--premium { background-color: var(--color-bg-dark); color: var(--color-text-inverse); }

/* --- Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-full);
  line-height: 1;
}
.badge--primary { background-color: var(--color-primary-light); color: var(--color-primary); }
.badge--success { background-color: var(--color-success-light); color: var(--color-success); }
.badge--warning { background-color: var(--color-accent-light); color: var(--color-accent-hover); }
.badge--danger  { background-color: var(--color-danger-light); color: var(--color-danger); }

/* --- Rating Stars --- */
.rating { display: inline-flex; align-items: center; gap: var(--space-1); }
.rating__stars { display: flex; gap: 1px; color: var(--color-accent); }
.rating__stars svg { width: 16px; height: 16px; fill: currentColor; }
.rating__stars svg.star--empty { color: var(--color-border); }
.rating__count { font-size: var(--text-xs); color: var(--color-text-muted); margin-left: var(--space-1); }
.rating__score { font-size: var(--text-sm); font-weight: var(--weight-semibold); color: var(--color-text); }

/* --- Pros & Cons --- */
.pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  margin: var(--space-8) 0;
  background: 
    linear-gradient(to right, #f4fbf7 50%, #fff9f9 50%) padding-box,
    linear-gradient(to right, #d1fae5 50%, #fee2e2 50%) border-box !important;
  border: 1px solid transparent !important;
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-8);
}
.pros-cons__column {
  padding: 0 !important;
  background: none !important;
  border: none !important;
}
.pros-cons__column--pros {
  padding-right: var(--space-4) !important;
}
.pros-cons__column--cons {
  padding-left: var(--space-4) !important;
}

.pros-cons__title { font-size: 15px; font-weight: var(--weight-bold); text-transform: uppercase; letter-spacing: 0.08em; padding-bottom: var(--space-3); margin-bottom: var(--space-5); }
.pros-cons__column--pros .pros-cons__title { color: #065f46; border-bottom: 1px solid rgba(16, 185, 129, 0.15); }
.pros-cons__column--cons .pros-cons__title { color: #991b1b; border-bottom: 1px solid rgba(239, 68, 68, 0.15); }

.pros-cons__list { display: flex; flex-direction: column; gap: var(--space-3); list-style: none; padding: 0; margin: 0; }
.pros-cons__item { display: flex; align-items: flex-start; gap: 10px; font-size: 15px; line-height: 1.5; color: #475569; }

.pros-cons__item::before {
  content: '';
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border-radius: 50%;
  background-size: 12px;
  background-position: center;
  background-repeat: no-repeat;
}
.pros-cons__column--pros .pros-cons__item::before {
  background-color: rgba(16, 185, 129, 0.1);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2310b981' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
}
.pros-cons__column--cons .pros-cons__item::before {
  background-color: rgba(239, 68, 68, 0.1);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ef4444' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cline x1='18' y1='6' x2='6' y2='18'%3E%3C/line%3E%3Cline x1='6' y1='6' x2='18' y2='18'%3E%3C/line%3E%3C/svg%3E");
}

/* --- Specifications Grid --- */
.specs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 768px) {
  .specs-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px 48px;
    position: relative;
  }
  .specs-grid::after {
    content: "";
    position: absolute;
    top: 16px;
    bottom: 16px;
    left: 50%;
    width: 1px;
    background-color: #e2e8f0;
    transform: translateX(-50%);
  }
}
.specs-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.specs-label {
  font-size: 11px;
  font-weight: var(--weight-bold);
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.specs-value {
  font-size: 14px;
  font-weight: 500;
  color: #1f2937;
  line-height: 1.4;
}

/* --- CTA Box --- */
.cta-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-6);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  margin: var(--space-6) 0;
}
.cta-box__price { font-size: var(--text-3xl); font-weight: var(--weight-extrabold); color: var(--color-text); }
.cta-box__label { font-size: var(--text-xs); color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.cta-box__disclaimer { font-size: var(--text-xs); color: var(--color-text-muted); font-style: italic; }

/* --- Comparison Table --- */
.comparison-table { width: 100%; border-collapse: collapse; margin: var(--space-8) 0; }
.comparison-table th, .comparison-table td { padding: var(--space-4); text-align: center; border: 1px solid var(--color-border-light); font-size: var(--text-sm); }
.comparison-table thead th { background-color: var(--color-bg-dark); color: var(--color-text-inverse); font-weight: var(--weight-semibold); text-transform: uppercase; letter-spacing: 0.04em; }
.comparison-table tbody th { text-align: left; background-color: var(--color-bg-alt); font-weight: var(--weight-medium); white-space: nowrap; }
.comparison-table td { color: var(--color-text-secondary); }
.comparison-table .winner { background-color: var(--color-success-light); font-weight: var(--weight-semibold); color: #065F46; }

/* --- Table of Contents --- */
.toc { background-color: var(--color-bg-alt); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-5); margin: var(--space-6) 0; }
.toc__title { font-size: var(--text-sm); font-weight: var(--weight-bold); text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text); margin-bottom: var(--space-3); }
.toc__list { display: flex; flex-direction: column; gap: var(--space-2); counter-reset: toc; }
.toc__item { counter-increment: toc; }
.toc__item a { display: flex; align-items: center; gap: var(--space-2); font-size: var(--text-sm); color: var(--color-text-secondary); padding: var(--space-1) 0; transition: color var(--transition-fast); }
.toc__item a::before { content: counter(toc, decimal-leading-zero); font-size: var(--text-xs); font-weight: var(--weight-bold); color: var(--color-primary); min-width: 24px; }
.toc__item a:hover { color: var(--color-primary); }

/* --- Collapsible Table of Contents --- */
.toc-details summary::-webkit-details-marker { display: none; }
.toc-details summary { list-style: none; }
.toc-details:not([open]) .toggle-text::after { content: "Show"; }
.toc-details[open] .toggle-text::after { content: "Hide"; }
.toc-details[open] .toggle-chevron { transform: rotate(180deg); }

/* --- Affiliate Disclosure --- */
.affiliate-disclosure {
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-bg-alt);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: var(--space-4) 0;
}

/* --- Build Cost Calculator --- */
.build-total {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  background: linear-gradient(135deg, var(--color-bg-dark), var(--color-bg-dark-alt));
  border-radius: var(--radius-lg);
  color: var(--color-text-inverse);
  margin: var(--space-6) 0;
}
.build-total__label { font-size: var(--text-sm); font-weight: var(--weight-medium); text-transform: uppercase; letter-spacing: 0.05em; opacity: 0.8; }
.build-total__price { font-size: var(--text-3xl); font-weight: var(--weight-extrabold); }

/* --- Responsive --- */
@media (max-width: 640px) {
  .pros-cons {
    grid-template-columns: 1fr;
    background: none !important;
    border: none !important;
    padding: 0 !important;
    gap: var(--space-5);
  }
  .pros-cons__column {
    padding: var(--space-6) !important;
    border-radius: var(--radius-xl) !important;
  }
  .pros-cons::after {
    display: none !important;
  }
  .pros-cons__column--pros {
    background-color: #f4fbf7 !important;
    border: 1px solid #d1fae5 !important;
  }
  .pros-cons__column--cons {
    background-color: #fff9f9 !important;
    border: 1px solid #fee2e2 !important;
  }
}

/* --- High-Converting CTA Box --- */
.ko-amz-cta-box {
  padding: var(--space-8);
  background: #eff6ff;
  border: 1px solid #dbeafe;
  border-radius: var(--radius-xl);
  box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.04);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
}
.ko-amz-cta-box--top {
  margin-bottom: var(--space-8);
}
.ko-amz-cta-box--bottom {
  margin: var(--space-10) 0 0 0;
}
.ko-amz-cta-box__list {
  list-style: none;
  padding: 0 !important;
  margin: var(--space-4) auto 0 auto !important;
  display: flex;
  flex-direction: column;
  gap: 16px;
  font-size: 15px;
  color: #475569;
  max-width: max-content;
  text-align: left;
}
.ko-amz-cta-box__btn {
  width: 100%;
  max-width: 420px;
  justify-content: center;
  padding: 18px 32px;
  text-align: center;
  display: inline-flex;
  align-items: center;
  background: linear-gradient(180deg, #3b82f6 0%, #1d4ed8 100%);
  color: #ffffff !important;
  border: 1px solid #1d4ed8;
  border-radius: 6px;
  text-decoration: none !important;
  transition: transform 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 4px 6px -1px rgba(0, 0, 0, 0.15), 0 2px 4px -1px rgba(0, 0, 0, 0.1);
}
.ko-amz-cta-box__btn:hover {
  transform: translateY(-2px);
  background: linear-gradient(180deg, #2563eb 0%, #1e40af 100%) !important;
  border-color: #1e40af;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.2), 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.15);
}
.ko-amz-cta-box__btn-inner {
  display: inline-flex;
  align-items: center;
  font-size: 21px;
  font-weight: var(--weight-bold);
  line-height: 1.2;
  white-space: nowrap;
}
.ko-amz-cta-box__title {
  font-size: 26px !important;
  font-weight: 800 !important;
  line-height: 1.3 !important;
  margin: 0 0 var(--space-5) 0 !important;
  color: #0f172a !important;
  letter-spacing: -0.02em !important;
  text-align: center !important;
}

@media (max-width: 768px) {
  .ko-amz-cta-box {
    padding: var(--space-5) var(--space-4);
    gap: var(--space-4);
  }
  .ko-amz-cta-box__list {
    max-width: 100%;
    margin-inline: 0 !important;
  }
  .ko-amz-cta-box__btn {
    padding: 14px 24px;
  }
  .ko-amz-cta-box__btn-inner {
    font-size: 18px;
    white-space: normal;
    text-align: center;
  }
  .ko-amz-cta-box__title {
    font-size: 20px !important;
    margin-bottom: var(--space-3) !important;
  }
}

@media (max-width: 640px) {
  .ko-amz-specs-container {
    padding: var(--space-4) var(--space-4) !important;
  }
}

/* Clickable CTA Card Overlay and Hover Transitions */
.ko-amz-cta-box--clickable {
  position: relative;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}
.ko-amz-cta-box--clickable:hover {
  border-color: #93c5fd;
  box-shadow: 0 15px 30px -5px rgba(37, 99, 235, 0.08);
}
.ko-amz-cta-box-overlay-link {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10;
  cursor: pointer;
}
.ko-amz-cta-box--clickable:hover .ko-amz-cta-box__btn {
  transform: translateY(-2px);
  background: linear-gradient(180deg, #2563eb 0%, #1e40af 100%) !important;
  border-color: #1e40af;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.2), 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.15);
}

/* ==========================================================================
   HEADER SEARCH COMPONENT
   ========================================================================== */
.header-search {
  position: relative;
  width: 100%;
  max-width: 480px;
  margin-inline: auto;
}

.header-search__form {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

.header-search__input {
  width: 100%;
  padding: 10px 64px 10px 16px;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text);
  background-color: var(--color-bg-alt);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  outline: none;
  transition: all var(--transition-fast);
}

.header-search__input:focus {
  background-color: #ffffff;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.header-search__submit {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-1);
  transition: color var(--transition-fast);
}

.header-search__submit:hover {
  color: var(--color-primary);
}

.header-search__icon {
  width: 16px;
  height: 16px;
}

/* Results Dropdown */
.header-search__results {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background-color: #ffffff;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-height: 380px;
  overflow-y: auto;
  z-index: var(--z-dropdown);
  padding: var(--space-2);
}

.header-search__results::-webkit-scrollbar {
  width: 6px;
}
.header-search__results::-webkit-scrollbar-track {
  background: transparent;
}
.header-search__results::-webkit-scrollbar-thumb {
  background-color: var(--color-border);
  border-radius: 3px;
}

/* Result Items */
.header-search__result-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: background-color var(--transition-fast);
  text-decoration: none;
}

.header-search__result-item:hover {
  background-color: var(--color-bg-alt);
}

.header-search__result-thumb {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-alt);
  object-fit: contain;
  flex-shrink: 0;
  padding: 4px;
  border: 1px solid var(--color-border-light);
}

.header-search__result-info {
  flex-grow: 1;
  min-width: 0;
}

.header-search__result-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text);
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-search__result-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.header-search__result-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  line-height: 1;
}

.header-search__result-tag--review {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.header-search__result-tag--comparison {
  background-color: var(--color-accent-light);
  color: var(--color-accent-hover);
}

.header-search__result-tag--build {
  background-color: var(--color-success-light);
  color: var(--color-success);
}

.header-search__result-rating {
  font-size: 11px;
  font-weight: var(--weight-bold);
  color: var(--color-text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.header-search__result-rating::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  background-color: var(--color-accent);
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}

/* States */
.header-search__no-results,
.header-search__loading {
  padding: var(--space-6) var(--space-4);
  text-align: center;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
}

.header-search__loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.header-search__spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: ko-amz-spin 0.6s linear infinite;
}

@keyframes ko-amz-spin {
  to { transform: rotate(360deg); }
}

.header-search__result-item.is-active,
.header-search__result-item:focus,
.header-search__zero-item.is-active,
.header-search__zero-item:focus,
.header-search__view-all.is-active,
.header-search__view-all:focus {
  background-color: var(--color-bg-alt);
  outline: none;
}

.header-search__zero-item.is-active {
  color: var(--color-primary);
}

.header-search__result-title mark {
  background: none;
  color: var(--color-primary);
  font-weight: var(--weight-extrabold);
}

.header-search__view-all {
  display: block;
  padding: var(--space-3) var(--space-4);
  text-align: center;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-primary);
  border-top: 1px solid var(--color-border-light);
  margin-top: var(--space-2);
  transition: background-color var(--transition-fast);
  text-decoration: none;
}
.header-search__view-all:hover {
  background-color: var(--color-bg-alt);
}

.header-search__clear {
  position: absolute;
  right: 38px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-1);
  transition: color var(--transition-fast);
}
.header-search__clear:hover {
  color: var(--color-text);
}

.header-search__zero-state {
  padding: var(--space-3) var(--space-4);
}
.header-search__zero-label {
  font-size: 10px;
  font-weight: var(--weight-extrabold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}
.header-search__zero-item {
  display: block;
  padding: var(--space-2) var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}
.header-search__zero-item:hover {
  color: var(--color-primary);
  background-color: var(--color-bg-alt);
}
.header-search__zero-divider {
  height: 1px;
  background-color: var(--color-border-light);
  margin: var(--space-3) 0;
}

/* Hide default search input cancel button */
.header-search__input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
}

/* --- Global Back to Top Button --- */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background-color: #2563eb;
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2), 0 2px 4px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px) scale(0.9);
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease, background-color 0.15s ease, box-shadow 0.15s ease;
  z-index: 999;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}
.back-to-top:hover {
  background-color: #1d4ed8;
  color: #ffffff;
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 6px 16px rgba(29, 78, 216, 0.3), 0 4px 6px rgba(0, 0, 0, 0.1);
}
.back-to-top:active {
  transform: translateY(0) scale(0.98);
}
.back-to-top svg {
  stroke-width: 3px;
}
@media (max-width: 640px) {
  .back-to-top {
    bottom: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
  }
  .back-to-top.visible {
    opacity: 0.8 !important;
  }
  .back-to-top.visible:hover, .back-to-top.visible:active {
    opacity: 1.0 !important;
  }
  .back-to-top svg {
    width: 16px !important;
    height: 16px !important;
  }
}

/* Category Accordion Transition styling */
.category-tab-btn {
  background: var(--color-bg-card);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: 9999px;
  padding: 8px 18px;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}
.category-tab-btn:hover {
  border-color: #60a5fa;
  color: var(--color-heading);
}
.category-tab-btn.is-active {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}