/* ===========================================================
   GNT — Product Landing: Photocatalytic Air Sterilizer
   Extends css/style.css (uses the same CSS custom properties,
   .container/.section/.section__ /.btn/.about__card/.text-gradient/
   .fade-in classes). Only page-specific components live here.
   =========================================================== */

/* ---------- Hero (two-column intro) ---------- */
.product-hero {
  padding-top: calc(var(--header-h) + 40px);
}

.product-hero__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(420px, 100%), 1fr));
  gap: 56px;
  align-items: center;
  margin-top: 50px;
}
.product-hero__grid > div {
  min-width: 0;
}

.product-hero .hero__subtitle {
  margin-left: 0;
  margin-right: 0;
  text-align: left;
  max-width: 560px;
}

.product-hero .hero__cta {
  justify-content: flex-start;
  margin-bottom: 0;
}

.product-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 48px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  overflow: hidden;
}

.product-hero__stat {
  background: var(--dark);
  padding: 18px 20px;
}

.product-hero__stat-value {
  display: block;
  /* font-family: var(--font-mono); */
  font-size: 24px;
  color: var(--green);
}

.product-hero__stat-label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--gray);
  letter-spacing: 0.02em;
}

.product-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: var(--dark);
}

.product-media img {
  display: block;
  width: 100%;
  height: auto;
}

.product-hero__chips {
  position: absolute;
  left: 20px;
  bottom: 20px;
  display: flex;
  flex-wrap: wrap;
  max-width: calc(100% - 40px);
  gap: 8px;
}

.product-hero__chip {
  padding: 6px 11px;
  border-radius: 100px;
  background: rgba(10, 10, 10, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.12);
  /* font-family: var(--font-mono); */
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white);
}

/* ---------- Strip ---------- */
.product-strip {
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  background: var(--black-alt);
  padding: 34px 0;
}

.product-strip__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.product-strip__title {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
}

.product-strip__tag {
  /* font-family: var(--font-mono); */
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green);
}

/* ---------- Section eyebrow shared across product sections ---------- */
.product-section {
  padding-top: 50px;
  padding-bottom: 50px;
}

/* ---------- Two-column media + content ---------- */
.product-split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(380px, 100%), 1fr));
  gap: 40px;
  align-items: center;
  margin-top: 44px;
}
.product-split > div {
  min-width: 0;
}
.product-split--wide {
  gap: 56px;
}
.product-split--reverse {
  direction: rtl;
}
.product-split--reverse > * {
  direction: ltr;
}

.product-card-stack {
  display: grid;
  gap: 14px;
}

/* ---------- Numbered steps (aerodynamics) ---------- */
.product-steps {
  display: grid;
  gap: 26px;
  margin-top: 32px;
}

.product-step {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 16px;
  align-items: start;
}

.product-step__icon {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid rgba(0, 255, 65, 0.4);
  color: var(--green);
  display: flex;
  align-items: center;
  justify-content: center;
  /* font-family: var(--font-mono); */
  font-size: 13px;
}

.product-step__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
}

.product-step__text {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--gray);
}

/* ---------- Callout ---------- */
.product-callout {
  margin-top: 34px;
  padding: 18px 22px;
  border-radius: var(--radius);
  border: 1px solid rgba(0, 255, 65, 0.28);
  background: var(--green-subtle);
  font-size: 15px;
  color: var(--white);
}

/* ---------- Comparison table ---------- */
.product-compare {
  display: grid;
  gap: 1px;
  margin-top: 28px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  overflow: hidden;
}

.product-compare__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: rgba(255, 255, 255, 0.08);
}

.product-compare__cell {
  background: var(--dark);
  padding: 16px 20px;
  font-size: 14px;
  color: var(--gray);
}

.product-compare__cell--head {
  font-size: 13.5px;
  font-weight: 600;
}
.product-compare__cell--head:last-child {
  color: var(--green);
}

.product-compare__cell--highlight {
  color: var(--white);
}

/* ---------- Design traits grid ---------- */
.product-traits {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: 14px;
  margin-top: 14px;
}

.product-trait {
  padding: 26px 26px 28px;
  border-radius: var(--radius-lg);
  background: var(--dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.product-trait--accent {
  background: var(--green-subtle);
  border-color: rgba(0, 255, 65, 0.28);
}

.product-trait__label {
  /* font-family: var(--font-mono); */
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green);
}

.product-trait__number {
  /* font-family: var(--font-mono); */
  font-size: 26px;
  color: var(--green);
}

.product-trait__value {
  margin: 10px 0 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
}

.product-trait__text {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--gray);
}

.product-trait--accent .product-trait__text {
  color: var(--white);
}

/* ---------- Version / variant compare cards ---------- */
.product-versions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(340px, 100%), 1fr));
  gap: 20px;
  margin-top: 40px;
}

.product-version-card {
  padding: 30px 32px;
  border-radius: var(--radius-lg);
  background: var(--dark);
  border: 1px solid rgba(0, 255, 65, 0.3);
}

.product-version-card--alt {
  border-color: rgba(168, 140, 255, 0.32);
}

.product-version-card__wave {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.product-version-card__wave-value {
  /* font-family: var(--font-mono); */
  font-size: 32px;
  color: var(--green);
}

.product-version-card--alt .product-version-card__wave-value {
  color: #a88cff;
}

.product-version-card__wave-label {
  font-size: 15px;
  color: var(--gray);
}

.product-version-card__title {
  margin-top: 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.product-version-card__list {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.product-version-card__item {
  font-size: 15px;
  line-height: 1.55;
  color: var(--gray);
}

.product-version-card__item--highlight {
  color: var(--white);
}

.product-version-card__footer {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--gray);
}

/* ---------- Use-case cards (image + caption) ---------- */
.product-case-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.product-case {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.product-case img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.product-case__body {
  padding: 22px 24px 26px;
}

.product-case__title {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
}

.product-case__text {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--gray);
}

/* ---------- Feature rows (app / interface) ---------- */
.product-feature-list {
  display: grid;
  gap: 12px;
  margin-top: 30px;
}

.product-feature-list--grid {
  grid-template-columns: repeat(2, 1fr);
}

.product-feature-row {
  display: flex;
  gap: 18px;
  align-items: baseline;
  padding: 20px 22px;
  border-radius: var(--radius);
  background: var(--dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.product-feature-row__label {
  /* font-family: var(--font-mono); */
  font-size: 13px;
  color: var(--green);
  white-space: nowrap;
}

.product-feature-row__text {
  font-size: 15px;
  line-height: 1.55;
  color: var(--gray);
}

/* ---------- Specs grid ---------- */
.product-specs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(360px, 100%), 1fr));
  gap: 1px;
  margin-top: 40px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.product-specs__row {
  background: var(--dark);
  padding: 22px 26px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.product-specs__label {
  font-size: 14.5px;
  color: var(--gray);
}

.product-specs__value {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--white);
  text-align: right;
}

.product-specs__value--mono {
  /* font-family: var(--font-mono); */
  font-weight: 400;
}

.product-specs__value--accent {
  color: var(--green);
}

/* ---------- Patent / IP note ---------- */
.product-note {
  margin-top: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: 32px;
  align-items: center;
  padding: 32px 34px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: var(--black-alt);
}

.product-note__kicker {
  /* font-family: var(--font-mono); */
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray);
}

.product-note__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--gray);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .product-case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .product-hero {
    padding-top: calc(var(--header-h) + 24px);
  }
  .product-hero__stats {
    grid-template-columns: 1fr;
  }
  .product-compare__row {
    grid-template-columns: 1fr;
  }
  .product-specs__row {
    flex-direction: column;
    gap: 4px;
  }
  .product-specs__value {
    text-align: left;
  }
  .product-strip__inner {
    justify-content: flex-start;
  }
  .product-case-grid {
    grid-template-columns: 1fr;
  }
  .catalog-grid {
    grid-template-columns: 1fr;
  }
  .product-feature-list--grid {
    grid-template-columns: 1fr;
  }
}

/* ===========================================================
   Catalog listing page (portfolio grid + filters)
   =========================================================== */

/* ---------- Hero ---------- */
.catalog-hero__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(420px, 100%), 1fr));
  gap: 40px;
  align-items: end;
  margin-top: 26px;
}

.catalog-hero .hero__subtitle {
  margin: 0;
  text-align: left;
  max-width: 560px;
}

/* ---------- Filters bar ---------- */
.catalog-filters-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding: 18px 0 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.catalog-filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.catalog-filter {
  padding: 9px 17px;
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  background: transparent;
  color: var(--gray);
  border: 1px solid rgba(255, 255, 255, 0.14);
  transition: var(--transition);
}
.catalog-filter:hover {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.3);
}
.catalog-filter.active {
  background: var(--green);
  color: var(--black);
  border-color: var(--green);
}

.catalog-count {
  /* font-family: var(--font-mono); */
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray);
}

/* ---------- Product grid ---------- */
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.catalog-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  background: var(--dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
  transition: var(--transition);
}
.catalog-card:hover {
  border-color: rgba(0, 255, 65, 0.4);
}

.catalog-card__media {
  position: relative;
  background: var(--black-alt);
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.catalog-card__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.catalog-card__badge {
  position: absolute;
  left: 16px;
  top: 16px;
  padding: 6px 12px;
  border-radius: 100px;
  background: rgba(10, 10, 10, 0.82);
  border: 1px solid rgba(0, 255, 65, 0.45);
  /* font-family: var(--font-mono); */
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green);
}

.catalog-card__badge--neutral {
  border-color: rgba(255, 255, 255, 0.14);
  color: var(--gray);
}

.catalog-card__body {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 24px 26px 26px;
  flex: 1;
}

.catalog-card__category {
  /* font-family: var(--font-mono); */
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray);
}

.catalog-card__title {
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--white);
}

.catalog-card__title--muted {
  color: var(--gray);
}

.catalog-card__progress {
  padding: 16px 18px;
  border-radius: 14px;
  background: var(--green-subtle);
  border: 1px solid rgba(0, 255, 65, 0.28);
}

.catalog-card__progress-label {
  /* font-family: var(--font-mono); */
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green);
}

.catalog-card__progress-bars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 5px;
  margin-top: 16px;
}

.catalog-card__progress-bar {
  height: 6px;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.1);
}
.catalog-card__progress-bar--filled {
  background: var(--green);
}

.catalog-card__progress-stage {
  margin-top: 10px;
  /* font-family: var(--font-mono); */
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--green);
}

.catalog-card__meta {
  display: grid;
  gap: 8px;
  margin-top: 2px;
}

.catalog-card__meta-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 13.5px;
  color: var(--white);
}
.catalog-card__meta-row span:first-child {
  color: var(--gray);
}
.catalog-card__meta-row--mono span:last-child {
  /* font-family: var(--font-mono); */
}

.catalog-card__note {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 14px;
  line-height: 1.55;
  color: var(--gray);
}

.catalog-card__actions {
  display: flex;
  gap: 10px;
  margin-top: auto;
  padding-top: 18px;
  flex-wrap: wrap;
}

/* Placeholder "coming soon" card */
.catalog-card--placeholder {
  background: var(--black-alt);
  border: 1px dashed rgba(255, 255, 255, 0.16);
}
.catalog-card--placeholder .catalog-card__media {
  display: flex;
  align-items: center;
  justify-content: center;
  background: repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.03) 0 12px, transparent 12px 24px);
}

.catalog-card__placeholder-icon {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: 1px dashed rgba(255, 255, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  /* font-family: var(--font-mono); */
  font-size: 22px;
  color: var(--gray);
}

/* ---------- Investment model box ---------- */
.catalog-model {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(360px, 100%), 1fr));
  gap: 32px;
  align-items: center;
  padding: 34px 36px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: var(--black-alt);
}

.catalog-model__kicker {
  /* font-family: var(--font-mono); */
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
}

.catalog-model__title {
  margin: 12px 0 0;
  font-size: 28px;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--white);
}

.catalog-model__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--gray);
}