:root {
  /* Warm palette — premium cards only */
  --vermilion: #FF4D24;
  --burnt-orange: #E86A33;
  --warm-amber: #FFB52E;
  --acid-yellow: #E8FF3D;
  --warm-ivory: #F2EBDD;
  --coral: #FF735D;

  /* Derived glows (opaque tints for layering) */
  --vermilion-glow: rgba(255, 77, 36, 0.28);
  --burnt-orange-glow: rgba(232, 106, 51, 0.26);
  --warm-amber-glow: rgba(255, 181, 46, 0.26);
  --coral-glow: rgba(255, 115, 93, 0.26);
  --acid-tint: rgba(232, 255, 61, 0.10);
  --ivory-tint: rgba(242, 235, 221, 0.08);
}

/* ───────────────────────────────────────────────────────────────
   PREMIUM CARDS
   Self-contained component layer. Add .premium-card to any
   .card, .step, or .plan and pick a theme with .premium-card--*
   to upgrade it to the warm, grain-textured, high-impact treatment.
   ─────────────────────────────────────────────────────────────── */

.premium-card {
  position: relative;
  background:
    radial-gradient(120% 90% at 20% 10%, rgba(255,77,36,.10), transparent 55%),
    linear-gradient(180deg, rgba(22,22,22,.92), rgba(8,8,10,.96));
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-lg, 8px);
  padding: 24px;
  overflow: hidden;
  transition: transform var(--dur-base, 200ms) var(--ease-out, cubic-bezier(.16,1,.3,1)),
              border-color var(--dur-base, 200ms) var(--ease-out),
              box-shadow var(--dur-base, 200ms) var(--ease-out);
  transform-style: preserve-3d;
  will-change: transform;
}

/* Subtle animated grain texture */
.premium-card::before {
  content: "";
  position: absolute;
  inset: -50%;
  z-index: 0;
  pointer-events: none;
  opacity: .16;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.12 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 180px 180px;
  animation: premium-grain 8s steps(10) infinite;
  mix-blend-mode: overlay;
}
@keyframes premium-grain {
  0%, 100% { transform: translate(0, 0); }
  10% { transform: translate(-5%, -5%); }
  20% { transform: translate(-10%, 5%); }
  30% { transform: translate(5%, -10%); }
  40% { transform: translate(-5%, 10%); }
  50% { transform: translate(-10%, 0); }
  60% { transform: translate(5%, 5%); }
  70% { transform: translate(0, -5%); }
  80% { transform: translate(-5%, 10%); }
  90% { transform: translate(10%, -5%); }
}

/* Top accent glow bar */
.premium-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--card-accent, var(--vermilion)), transparent);
  opacity: .55;
  z-index: 1;
  transition: opacity var(--dur-base, 200ms), height var(--dur-base, 200ms);
}

/* Content sits above grain */
.premium-card > * { position: relative; z-index: 2; }

/* ── Theme variants ── */
.premium-card--models { --card-accent: var(--vermilion); }
.premium-card--system { --card-accent: var(--burnt-orange); }
.premium-card--install { --card-accent: var(--warm-amber); }
.premium-card--pricing { --card-accent: var(--coral); }

/* Theme-tinted background washes */
.premium-card--models {
  background:
    radial-gradient(140% 110% at 20% 0%, var(--vermilion-glow), transparent 60%),
    radial-gradient(120% 90% at 90% 10%, rgba(232,255,61,.06), transparent 45%),
    linear-gradient(180deg, rgba(22,22,22,.94), rgba(8,8,10,.98));
}
.premium-card--system {
  background:
    radial-gradient(140% 110% at 20% 0%, var(--burnt-orange-glow), transparent 60%),
    radial-gradient(120% 90% at 80% 5%, rgba(255,77,36,.08), transparent 45%),
    linear-gradient(180deg, rgba(22,22,22,.94), rgba(8,8,10,.98));
}
.premium-card--install {
  background:
    radial-gradient(140% 110% at 20% 0%, var(--warm-amber-glow), transparent 60%),
    radial-gradient(120% 90% at 85% 8%, rgba(232,255,61,.09), transparent 45%),
    linear-gradient(180deg, rgba(22,22,22,.94), rgba(8,8,10,.98));
}
.premium-card--pricing {
  background:
    radial-gradient(140% 110% at 20% 0%, var(--coral-glow), transparent 60%),
    radial-gradient(120% 90% at 85% 8%, rgba(255,181,46,.07), transparent 45%),
    linear-gradient(180deg, rgba(22,22,22,.94), rgba(8,8,10,.98));
}

/* ── Interactive shine layer (driven by JS custom props) ── */
.premium-card .shine {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background: radial-gradient(
    600px circle at var(--px, 50%) var(--py, 50%),
    rgba(255,255,255,.10) 0%,
    rgba(255,255,255,.03) 25%,
    transparent 55%
  );
  opacity: 0;
  transition: opacity var(--dur-base, 200ms) var(--ease-out);
}
.premium-card:hover .shine { opacity: 1; }

/* ── Hover states ── */
.premium-card:hover {
  border-color: color-mix(in srgb, var(--card-accent, var(--vermilion)) 55%, rgba(255,255,255,.25));
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--card-accent, var(--vermilion)) 18%, transparent),
    0 18px 50px -12px rgba(0,0,0,.55),
    0 0 40px -10px var(--card-accent, var(--vermilion-glow));
}
.premium-card:hover::after {
  opacity: .9;
  height: 2px;
  box-shadow: 0 0 18px var(--card-accent, var(--vermilion));
}

/* ── Icons adapted to theme ── */
.premium-card .card-icon,
.premium-card .step .idx,
.premium-card .plan::before {
  color: var(--card-accent, var(--vermilion));
}
.premium-card .card-icon {
  background: color-mix(in srgb, var(--card-accent, var(--vermilion)) 10%, transparent);
  border-color: color-mix(in srgb, var(--card-accent, var(--vermilion)) 22%, transparent);
}
.premium-card:hover .card-icon {
  background: color-mix(in srgb, var(--card-accent, var(--vermilion)) 16%, transparent);
  border-color: color-mix(in srgb, var(--card-accent, var(--vermilion)) 35%, transparent);
  transform: scale(1.08);
}
.premium-card .step .idx {
  background: color-mix(in srgb, var(--card-accent, var(--vermilion)) 12%, transparent);
  border-color: color-mix(in srgb, var(--card-accent, var(--vermilion)) 25%, transparent);
}
.premium-card:hover .step .idx {
  background: color-mix(in srgb, var(--card-accent, var(--vermilion)) 20%, transparent);
  border-color: color-mix(in srgb, var(--card-accent, var(--vermilion)) 42%, transparent);
}

/* ── Typography on premium cards ── */
.premium-card h3,
.premium-card .card__title,
.premium-card .plan h3 {
  color: var(--warm-ivory);
}
.premium-card p,
.premium-card .card__description,
.premium-card .plan li,
.premium-card li::before {
  color: rgba(242,235,221,.78);
}
.premium-card .plan li::before { color: var(--card-accent, var(--vermilion)); }
.premium-card .price { color: var(--warm-ivory); }

/* ── 3D tilt base (JS updates --rx/--ry) ── */
.premium-card[data-tilt="true"] {
  transform: perspective(1000px)
    rotateX(var(--rx, 0deg))
    rotateY(var(--ry, 0deg))
    translateZ(0);
}

/* ── Model-card extras: feature lists and model tags ── */
.premium-card .card-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 7px;
}
.premium-card .card-list li {
  position: relative;
  padding-left: 18px;
  font-size: 13px;
  line-height: 1.55;
  color: rgba(242,235,221,.72);
}
.premium-card .card-list li::before {
  content: "›";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--card-accent, var(--vermilion));
  font-weight: 700;
  font-size: 14px;
}
.premium-card .card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 18px;
}
.premium-card .model-tag {
  display: inline-flex;
  align-items: center;
  padding: 5px 9px;
  border-radius: 9999px;
  font: 510 11px/1 var(--mono);
  letter-spacing: .02em;
  border: 1px solid color-mix(in srgb, var(--card-accent, var(--vermilion)) 24%, rgba(255,255,255,.08));
  background: color-mix(in srgb, var(--card-accent, var(--vermilion)) 8%, transparent);
  color: color-mix(in srgb, var(--card-accent, var(--vermilion)) 80%, var(--warm-ivory));
  transition: transform var(--dur-base, 200ms) var(--ease-out), border-color var(--dur-base);
}
.premium-card:hover .model-tag {
  border-color: color-mix(in srgb, var(--card-accent, var(--vermilion)) 40%, rgba(255,255,255,.14));
}
.premium-card:hover .model-tag:nth-child(odd) { transform: translateY(-1px); }

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  .premium-card,
  .premium-card::before,
  .premium-card .shine,
  .premium-card .card-icon,
  .premium-card .step .idx {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
  .premium-card .shine { opacity: 0 !important; }
}

/* ── Light mode ── */
.site-light .premium-card {
  background:
    radial-gradient(140% 110% at 20% 0%, color-mix(in srgb, var(--card-accent, var(--vermilion)) 16%, transparent), transparent 65%),
    linear-gradient(180deg, #ffffff, #faf8f2);
  border-color: color-mix(in srgb, var(--card-accent, var(--vermilion)) 22%, rgba(0,0,0,.08));
}
.site-light .premium-card::before {
  opacity: .10;
  mix-blend-mode: multiply;
}
.site-light .premium-card:hover {
  border-color: color-mix(in srgb, var(--card-accent, var(--vermilion)) 55%, rgba(0,0,0,.12));
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--card-accent, var(--vermilion)) 14%, transparent),
    0 16px 40px -10px rgba(0,0,0,.12),
    0 0 30px -8px color-mix(in srgb, var(--card-accent, var(--vermilion)) 25%, transparent);
}
.site-light .premium-card h3,
.site-light .premium-card .card__title,
.site-light .premium-card .plan h3,
.site-light .premium-card .price {
  color: #1a1815;
}
.site-light .premium-card p,
.site-light .premium-card .card__description,
.site-light .premium-card .plan li,
.site-light .premium-card .annual {
  color: #4f4a43;
}
.site-light .premium-card .card-icon {
  background: color-mix(in srgb, var(--card-accent, var(--vermilion)) 12%, transparent);
  border-color: color-mix(in srgb, var(--card-accent, var(--vermilion)) 25%, transparent);
  color: color-mix(in srgb, var(--card-accent, var(--vermilion)) 85%, #1a1815);
}
.site-light .premium-card .card-list li { color: #4f4a43; }
.site-light .premium-card .card-list li::before { color: var(--card-accent, var(--vermilion)); }
.site-light .premium-card .model-tag {
  background: color-mix(in srgb, var(--card-accent, var(--vermilion)) 10%, transparent);
  border-color: color-mix(in srgb, var(--card-accent, var(--vermilion)) 28%, rgba(0,0,0,.10));
  color: color-mix(in srgb, var(--card-accent, var(--vermilion)) 75%, #1a1815);
}