/* ============================================
   UUBA Tech — Product Page Styles
   ============================================ */

/* --- Product Hero --- */
.product-hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  background: var(--color-light);
  padding: 140px 0 100px;
}

.product-hero-dark {
  background: var(--color-dark);
  color: var(--color-light);
}

.product-hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
}

.back-link {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--color-gray);
  margin-bottom: 2rem;
  transition: color 0.3s;
}

.back-link:hover {
  color: var(--color-dark);
}

.product-hero-dark .back-link:hover {
  color: var(--color-light);
}

.product-hero-content .label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  margin-bottom: 1rem;
  display: block;
}

.product-hero-content h1 {
  font-size: clamp(4rem, 10vw, 8rem);
  margin-bottom: 1.5rem;
  line-height: 0.85;
}

.product-hero-content .subtitle {
  max-width: 500px;
  margin-bottom: 2.5rem;
}

.product-hero-dark .subtitle {
  opacity: 0.75;
}

.product-hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.product-hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.product-icon-large {
  width: 200px;
  height: 200px;
  border: 2px solid var(--color-light-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.product-icon-large:hover {
  transform: scale(1.05) rotate(5deg);
}

.product-icon-large svg {
  width: 100%;
  height: 100%;
}

/* --- Product Section --- */
.product-section {
  padding: var(--section-padding);
  background: var(--color-light);
}

/* --- Steps --- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2.5rem;
}

.step {
  position: relative;
  padding: 2rem 0;
}

.step-number {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-red);
  line-height: 1;
  margin-bottom: 1rem;
  opacity: 0.3;
}

.step h4 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.75rem;
  line-height: 1;
}

.step p {
  font-size: 0.95rem;
  color: var(--color-gray);
  line-height: 1.6;
}

/* --- Features Detail --- */
.product-features-section {
  padding: var(--section-padding);
  background: #fff;
}

.features-detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.feature-detail {
  padding: 2rem;
  border: 1px solid var(--color-light-border);
  border-radius: 2px;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.feature-detail:hover {
  border-color: var(--color-red);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.06);
}

.feature-detail h3 {
  font-size: 1.6rem;
  margin-bottom: 0.75rem;
  line-height: 1;
}

.feature-detail p {
  font-size: 0.9rem;
  color: var(--color-gray);
  line-height: 1.6;
}

/* --- Responsive --- */

@media (max-width: 1024px) {
  .product-hero {
    min-height: auto;
    padding: 120px 0 80px;
  }

  .features-detail-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .product-hero {
    padding: 100px 0 60px;
  }

  .product-hero-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .product-hero-visual {
    order: -1;
  }

  .product-icon-large {
    width: 120px;
    height: 120px;
    padding: 1.75rem;
  }

  .product-hero-content h1 {
    font-size: clamp(3rem, 9vw, 5rem);
  }

  .product-hero-content .subtitle {
    max-width: 100%;
    font-size: 0.95rem;
  }

  .product-hero-actions {
    flex-direction: column;
  }

  .product-hero-actions .btn {
    width: 100%;
    text-align: center;
  }

  .steps-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .step {
    padding: 1.5rem 0;
  }

  .step-number {
    font-size: 3rem;
  }

  .step h4 {
    font-size: 1.4rem;
  }

  .step p {
    font-size: 0.85rem;
  }

  .features-detail-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .feature-detail {
    padding: 1.5rem;
  }

  .feature-detail h3 {
    font-size: 1.3rem;
  }

  .feature-detail p {
    font-size: 0.85rem;
  }

  .back-link {
    margin-bottom: 1.5rem;
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .product-hero {
    padding: 80px 0 40px;
  }

  .product-hero-content h1 {
    font-size: clamp(2.5rem, 12vw, 4rem);
  }

  .product-icon-large {
    width: 100px;
    height: 100px;
    padding: 1.5rem;
  }

  .steps-grid {
    grid-template-columns: 1fr;
  }

  .step-number {
    font-size: 2.5rem;
  }
}

@media (hover: none) {
  .product-icon-large:hover {
    transform: none;
  }

  .feature-detail:hover {
    transform: none;
    box-shadow: none;
  }
}