:root {
  --bg: #ffffff;
  --bg2: #f8f7f5;
  --ink: #1a1a18;
  --muted: #7a7a72;
  --rule: #e4e2dc;
  --accent: #2a5c8f;
  --accent2: #c8a85a;
  --max: 1200px
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'DM Sans', sans-serif
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 2rem
}

.section {
  padding: 80px 0
}

.section--alt {
  background: var(--bg2)
}

.eyebrow {
  display: inline-block;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent2);
  margin-bottom: 1rem
}

h2.section-title {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--ink);
  line-height: 1.15;
  margin-bottom: 1.5rem
}

p.lead {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--muted);
  max-width: 680px
}

/* ── HERO ── */
.prod-hero {
  width: 100%;
  height: 406px;
  position: relative;
  overflow: hidden
}

.prod-hero__bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block
}

.prod-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(270deg, rgba(26, 26, 24, .78) 0%, rgba(26, 26, 24, .25) 55%, transparent 100%);
  display: flex;
  align-items: center;
  justify-content: flex-end
}

.prod-hero__text {
  padding: 0 4rem;
  text-align: right
}

.prod-hero__text h1 {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  color: #fff;
  line-height: 1.1;
  margin-bottom: .75rem
}

.prod-hero__text p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, .75);
  max-width: 460px;
  margin-left: auto
}

/* ── FILTROS ── */
.prod-filters {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem
}

.filter-btn {
  padding: .5rem 1.25rem;
  border: 2px solid var(--rule);
  background: transparent;
  border-radius: 20px;
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
  cursor: pointer;
  transition: all .2s
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--accent2);
  color: var(--accent2);
  background: rgba(200, 168, 90, .07)
}

/* ── GRID ── */
.prod-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem
}

/* ── CARD FLIP ── */
.prod-card {
  height: 300px;
  perspective: 1000px;
  cursor: default
}

.prod-card.hidden {
  display: none
}

.prod-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform .55s cubic-bezier(.4, 0, .2, 1);
  transform-style: preserve-3d
}

.prod-card:hover .prod-card__inner {
  transform: rotateY(180deg)
}

.prod-card__front,
.prod-card__back {
  position: absolute;
  inset: 0;
  border-radius: 12px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  overflow: hidden
}

/* FRENTE */
.prod-card__front {
  background: var(--bg);
  border: 1px solid var(--rule);
  display: flex;
  flex-direction: column
}

.prod-card__img {
  flex: 1;
  background: var(--bg2);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative
}

.prod-card__img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: .75rem
}

.prod-card__img-placeholder {
  font-size: .65rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: .08em;
  text-transform: uppercase;
  text-align: center;
  padding: 1rem
}

.prod-card__badge {
  position: absolute;
  top: .6rem;
  right: .6rem;
  background: var(--accent2);
  color: #fff;
  font-size: .58rem;
  font-weight: 800;
  letter-spacing: .1em;
  padding: .25rem .55rem;
  border-radius: 20px;
  text-transform: uppercase
}

.prod-card__info {
  padding: .85rem 1rem;
  border-top: 1px solid var(--rule);
  background: var(--bg)
}

.prod-card__name {
  font-weight: 700;
  font-size: .88rem;
  color: var(--ink);
  line-height: 1.3;
  margin-bottom: .2rem
}

.prod-card__cat {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent2)
}

/* REVERSO */
.prod-card__back {
  background: var(--accent);
  transform: rotateY(180deg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1.75rem 1.5rem;
  gap: 1rem
}

.prod-card__back-name {
  font-family: 'DM Serif Display', serif;
  font-size: 1.15rem;
  color: #fff;
  line-height: 1.25
}

.prod-card__back-rows {
  display: flex;
  flex-direction: column;
  gap: .6rem
}

.prod-card__back-row {
  display: flex;
  flex-direction: column;
  gap: .15rem
}

.prod-card__back-label {
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .55)
}

.prod-card__back-value {
  font-size: .88rem;
  font-weight: 600;
  color: #fff
}

.prod-card__back-marca {
  margin-top: auto;
  padding-top: .75rem;
  border-top: 1px solid rgba(255, 255, 255, .2);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent2)
}

/* ── COUNTER ── */
.prod-counter {
  font-size: .82rem;
  color: var(--muted);
  margin-top: 1.5rem;
  text-align: right
}

/* ── CERTIFICACIONES ── */
.cert-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.cert-cta {
  display: inline-block;
  margin-top: 2rem;
  padding: .85rem 2rem;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: .85rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 4px;
  transition: background .2s;
}

.cert-cta:hover {
  background: var(--accent2);
  color: #fff;
}

.cert-imagen {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0, 0, 0, .1);
  background: var(--bg);
}

.cert-imagen img {
  width: 100%;
  display: block;
}

/* ── WHATSAPP ── */
.wa-float {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 9999;
  width: 64px;
  height: 64px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, .35);
  transition: transform .2s ease;
  text-decoration: none
}

.wa-float:hover {
  transform: scale(1.1)
}

.wa-ping {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: #25D366;
  opacity: .2;
  animation: wa-ping 1.5s cubic-bezier(0, 0, .2, 1) infinite
}

@keyframes wa-ping {

  75%,
  100% {
    transform: scale(2);
    opacity: 0
  }
}

/* ── RESPONSIVE ── */
@media(max-width:600px) {
  .container {
    padding: 0 1.25rem
  }

  p.lead {
    max-width: 100%
  }

  .prod-hero {
    height: 280px
  }

  .prod-hero__overlay {
    background: linear-gradient(0deg, rgba(26, 26, 24, .78) 30%, rgba(26, 26, 24, .25) 60%, transparent 100%);
  }

  .prod-hero__text {
    padding: 0 1.5rem !important;
    margin-top: 15% !important;
    text-align: center !important;
  }

  .prod-hero__text h1 {
    text-align: center !important;
  }

  .prod-hero__text p {
    max-width: 100% !important;
    text-align: center !important;
  }

  .prod-grid {
    grid-template-columns: repeat(2, 1fr)
  }

  .prod-card {
    height: 270px
  }

  @media(max-width: 900px) {
    .cert-grid {
      grid-template-columns: 1fr;
      gap: 2.5rem;
    }

    .cert-imagen {
      order: -1;
    }

    .prod-hero__text {
      padding: 1.5rem;
      text-align: right
    }

    .prod-grid {
      grid-template-columns: repeat(auto-fill, minmax(160px, 1fr))
    }
  }
}