/* ==========================================================================
   FairTech Homepage Category Cards — asymmetric "bento" grid.
   Page-scoped to index.php (Popular Categories section only). Uses its own
   .ds-cat-* classes throughout so the sibling "Shop by Brands" section,
   which reuses the old .single-category markup, is completely unaffected.
   Built on design-system.css tokens (Step 1).
   ========================================================================== */

.ds-cat-section {
  padding: var(--ds-space-lg, 32px) 0;
}

.ds-cat-section__head {
  display: flex;
  align-items: center;
  gap: var(--ds-space-md, 20px);
  margin-bottom: var(--ds-space-md, 20px);
}

/* ---- Uniform grid: every category card the same size ---- */

.ds-cat-grid-compact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--ds-space-sm, 12px);
}

/* ---- Card shell ---- */

.ds-cat-card {
  position: relative;
  display: block;
  text-decoration: none;
  border-radius: var(--ds-radius-lg, 20px);
  perspective: 1000px;
  min-height: 150px;
}

.ds-cat-card__tilt {
  position: relative;
  height: 100%;
  min-height: inherit;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  border-radius: inherit;
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: var(--shadow-sm, 0 2px 8px rgba(15, 23, 42, 0.07));
  transform-style: preserve-3d;
  will-change: transform;
  transition: transform 320ms var(--ds-ease-out, cubic-bezier(0.16, 1, 0.3, 1)),
              box-shadow 320ms var(--ds-ease-out, cubic-bezier(0.16, 1, 0.3, 1));
  background: linear-gradient(150deg, var(--ds-cat-a, #0066ff) 0%, var(--ds-cat-b, #3d8bff) 100%);
}

.ds-cat-card__bg {
  position: absolute;
  inset: -10%;
  background-image:
    radial-gradient(38% 45% at 85% 15%, rgba(255, 255, 255, 0.22) 0%, transparent 70%),
    radial-gradient(45% 55% at 10% 100%, rgba(0, 0, 0, 0.18) 0%, transparent 70%);
  transition: transform 420ms var(--ds-ease-out, cubic-bezier(0.16, 1, 0.3, 1));
}

/* cursor-follow light — position driven by --mx/--my set via JS, harmless no-op if unset */
.ds-cat-card__glow {
  position: absolute;
  inset: 0;
  opacity: 0;
  background: radial-gradient(220px circle at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, 0.35), transparent 60%);
  transition: opacity 260ms ease;
  pointer-events: none;
}

.ds-cat-card__visual {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--ds-space-lg, 32px);
  transition: transform 380ms var(--ds-ease-out, cubic-bezier(0.16, 1, 0.3, 1));
}

.ds-cat-card__visual .material-symbols-outlined {
  font-size: 56px;
  color: rgba(255, 255, 255, 0.92);
  filter: drop-shadow(0 8px 18px rgba(0, 0, 0, 0.25));
}

.ds-cat-card--small .ds-cat-card__visual .material-symbols-outlined { font-size: 40px; }
.ds-cat-card--small .ds-cat-card__visual { padding-top: var(--ds-space-md, 20px); }

.ds-cat-card__body {
  position: relative;
  z-index: 1;
  padding: var(--ds-space-md, 20px);
  color: #ffffff;
  font-family: "Poppins", sans-serif;
}

.ds-cat-card--small .ds-cat-card__body {
  padding: var(--ds-space-sm, 12px);
}

.ds-cat-card__title {
  font-weight: 700;
  font-size: 20px;
  line-height: 1.2;
  margin: 0 0 4px;
}

.ds-cat-card--small .ds-cat-card__title { font-size: 15px; margin-bottom: 2px; }

.ds-cat-card__sub {
  font-size: 13px;
  font-weight: 400;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.82);
  margin: 0 0 10px;
  max-width: 34ch;
}

.ds-cat-card--small .ds-cat-card__sub { display: none; }

.ds-cat-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
  transition: gap 220ms var(--ds-ease-out, cubic-bezier(0.16, 1, 0.3, 1)),
              opacity 220ms ease;
  opacity: 0.88;
}

.ds-cat-card__cta .material-symbols-outlined {
  font-size: 16px;
  transition: transform 220ms var(--ds-ease-out, cubic-bezier(0.16, 1, 0.3, 1));
}

/* ---- 3D hover: tilt, visual pops forward, bg drifts, cta sharpens, light follows cursor ---- */

@media (hover: hover) and (pointer: fine) {
  .ds-cat-card:hover .ds-cat-card__tilt {
    transform: translateY(-6px) rotateX(3deg) rotateY(-3deg);
    box-shadow: var(--shadow-lg, 0 20px 48px rgba(15, 23, 42, 0.18));
  }

  .ds-cat-card:hover .ds-cat-card__bg {
    transform: scale(1.06) translate(-1%, -1%);
  }

  .ds-cat-card:hover .ds-cat-card__visual {
    transform: translateZ(36px) scale(1.05);
  }

  .ds-cat-card:hover .ds-cat-card__glow {
    opacity: 1;
  }

  .ds-cat-card:hover .ds-cat-card__cta {
    opacity: 1;
    gap: 8px;
  }

  .ds-cat-card:hover .ds-cat-card__cta .material-symbols-outlined {
    transform: translateX(3px);
  }
}

.ds-cat-card:focus-visible .ds-cat-card__tilt {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
  transform: translateY(-4px);
}

/* Touch: no tilt/pop, just a brief press feedback */
@media not all and (hover: hover) {
  .ds-cat-card:active .ds-cat-card__tilt {
    transform: scale(0.98);
  }
}

@media (prefers-reduced-motion: reduce) {
  .ds-cat-card__tilt,
  .ds-cat-card__bg,
  .ds-cat-card__visual,
  .ds-cat-card__cta,
  .ds-cat-card__cta .material-symbols-outlined {
    transition-duration: 1ms;
  }
  .ds-cat-card:hover .ds-cat-card__tilt {
    transform: translateY(-4px);
  }
  .ds-cat-card:hover .ds-cat-card__visual {
    transform: none;
  }
}

/* ---- Per-category gradient tones ---- */

.ds-cat-tone--mobile   { --ds-cat-a: #2563eb; --ds-cat-b: #60a5fa; }
.ds-cat-tone--pc       { --ds-cat-a: #1e293b; --ds-cat-b: #475569; }
.ds-cat-tone--gaming   { --ds-cat-a: #7c3aed; --ds-cat-b: #c026d3; }
.ds-cat-tone--component{ --ds-cat-a: #0f172a; --ds-cat-b: #334155; }
.ds-cat-tone--accessories { --ds-cat-a: #ea580c; --ds-cat-b: #f59e0b; }
.ds-cat-tone--peripherals { --ds-cat-a: #0891b2; --ds-cat-b: #22d3ee; }
.ds-cat-tone--power    { --ds-cat-a: #ca8a04; --ds-cat-b: #eab308; }
.ds-cat-tone--smart    { --ds-cat-a: #059669; --ds-cat-b: #34d399; }
.ds-cat-tone--printer  { --ds-cat-a: #475569; --ds-cat-b: #64748b; }
.ds-cat-tone--software { --ds-cat-a: #db2777; --ds-cat-b: #f472b6; }

/* ---- Mobile: compact grid / horizontal-friendly ---- */

@media (max-width: 575px) {
  .ds-cat-grid-compact {
    grid-template-columns: repeat(2, 1fr);
  }
}