/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  min-height: calc(100svh - var(--header-h));
  display: flex;
  align-items: center;
  color: #fff;
  margin-top: var(--header-h);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10, 14, 18, 0.28), rgba(10, 14, 18, 0.42)),
    url("../image/hero-advanced-materials.jpg") center / cover no-repeat;
}

.hero__content {
  position: relative;
  z-index: 1;
  padding-block: clamp(2rem, 4vh, 3rem) clamp(2.5rem, 6vh, 4rem);
  max-width: 44rem;
}

.hero__content .hero__brand,
.hero__content .hero__stars,
.hero__content h1,
.hero__content > p {
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.45);
}

.hero__brand {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 0.85rem;
}

.hero__stars {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  opacity: 0.85;
}

.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.88);
  max-width: 32rem;
  margin-bottom: 1.75rem;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Trust */
.trust {
  background: var(--bg-soft);
  padding-block: 1.75rem;
  border-block: 1px solid var(--line);
}

.trust__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem 1.75rem;
}

.trust__label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.trust__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  justify-content: center;
}

.trust__chips span {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 0.45rem 0.85rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

/* Products */
.products-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.1rem;
}

@media (min-width: 640px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(2, minmax(0, 420px));
    justify-content: center;
  }
}

.product-card.is-hidden {
  display: none;
}

/* How we work */
.howto {
  background: var(--surface);
  border-block: 1px solid var(--line);
}

.howto__grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.howto__media img {
  width: 100%;
  height: min(520px, 70vw);
  object-fit: cover;
}

.howto__steps {
  display: grid;
  gap: 1.25rem;
}

.howto__steps h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-bottom: 0.5rem;
}

.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.85rem;
  align-items: start;
}

.step__num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--accent);
  line-height: 1;
}

.step strong {
  display: block;
  margin-bottom: 0.2rem;
}

.step p {
  color: var(--muted);
  font-size: 0.95rem;
}

@media (min-width: 900px) {
  .howto__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3rem;
  }
}

/* Why */
.why-list {
  display: grid;
  gap: 0;
  max-width: 780px;
  margin: 0 auto;
}

.why-item {
  display: grid;
  gap: 0.35rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
  transition: padding-left var(--ease-fast);
}

.why-item:last-child {
  border-bottom: 1px solid var(--line);
}

.why-item:hover {
  padding-left: 0.5rem;
}

.why-item h3 {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.why-item p {
  color: var(--muted);
}

/* About / story */
.story {
  background: var(--ink);
  color: #fff;
}

.story__grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.story__copy h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0.75rem 0 1rem;
}

.story__copy p {
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 1.5rem;
  max-width: 34rem;
}

.story__media img {
  width: 100%;
  height: min(480px, 70vw);
  object-fit: cover;
}

@media (min-width: 900px) {
  .story__grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
}

/* FAQ */
.faq {
  background: var(--surface);
}

.faq-wrap {
  max-width: 760px;
  margin: 0 auto;
}

/* Contact */
.contact__grid {
  display: grid;
  gap: 2rem;
  align-items: start;
}

.contact__aside {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 1.25rem;
}

.contact__aside h3 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

.contact__aside p {
  color: var(--muted);
  margin-bottom: 0.45rem;
}

.contact__aside iframe {
  width: 100%;
  max-width: 100%;
  height: 200px;
  border: 0;
  margin-top: 1rem;
}

@media (min-width: 900px) {
  .contact__grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 2.5rem;
  }
}

/* Footer */
.site-footer {
  background: #0d1116;
  color: rgba(255, 255, 255, 0.82);
  padding: 3.5rem 0 2rem;
}

.footer__grid {
  display: grid;
  gap: 2rem;
}

.footer__grid h5 {
  font-family: var(--font-body);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #fff;
  margin: 0 0 0.9rem;
}

.footer__grid li,
.footer__grid p {
  font-size: 0.92rem;
  margin-bottom: 0.4rem;
}

.footer__grid a:hover {
  color: #fff;
}

.footer__bottom {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.55);
}

@media (min-width: 800px) {
  .footer__grid {
    grid-template-columns: 1.2fr 1fr 1fr 1fr;
  }
}