.page-index {
  --primary-color: #017439;
  --secondary-color: #FFFFFF;
  --register-button-color: #C30808;
  --login-button-color: #C30808;
  --background-color: #FFFFFF;
  --register-login-font-color: #FFFF00;
  padding-top: 10px; /* Small top padding for first section */
  background-color: var(--background-color);
  color: #333333;
}

.page-index__container {
  max-width: 1390px;
  margin: 0 auto;
  padding: 0 15px;
}

.page-index__hero-banner {
  width: 100%;
  margin: 0;
  overflow: hidden;
  display: block;
}

.page-index__hero-banner img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 16 / 5; /* 1920x600 */
  object-fit: cover;
  object-position: center;
  filter: none; /* Ensure no filter is applied */
}

.page-index__section-title {
  padding: 40px 0;
  text-align: center;
}

.page-index__main-heading {
  font-size: clamp(1.8rem, 4.5vw, 2.8rem); /* Adjust clamp values for better H1 on mobile */
  font-weight: 700;
  line-height: 1.2;
  color: var(--primary-color);
  margin-bottom: 15px;
  letter-spacing: -0.5px;
  max-width: 800px; /* Limit width for better readability */
  margin-left: auto;
  margin-right: auto;
  text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

.page-index__sub-heading {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: #666666;
  max-width: 900px;
  margin: 0 auto;
  line-height: 1.6;
}

.page-index__category-gateway {
  padding: 40px 0;
}

.page-index__category-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, 1fr); /* Mobile default: 3 rows x 2 columns */
}

.page-index__category-card {
  display: block;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  background-color: var(--secondary-color);
}

.page-index__category-card:hover {
  transform: scale(1.03);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.page-index__category-card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
  filter: none; /* Ensure full color, no grayscale */
  transition: transform .2s ease;
}

/* Ensure color contrast for text on buttons */
.page-index__button {
  display: inline-block;
  padding: 12px 25px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  margin-top: 20px;
  transition: background-color 0.3s ease, color 0.3s ease;
  min-height: 48px; /* WCAG minimum target size */
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.page-index__button--register {
  background-color: var(--register-button-color);
  color: var(--register-login-font-color);
}

.page-index__button--register:hover {
  background-color: darken(var(--register-button-color), 10%);
}

.page-index__button--login {
  background-color: var(--login-button-color);
  color: var(--register-login-font-color);
}

.page-index__button--login:hover {
  background-color: darken(var(--login-button-color), 10%);
}

.page-index__button--download {
  background-color: var(--primary-color);
  color: var(--secondary-color);
}

.page-index__button--download:hover {
  background-color: darken(var(--primary-color), 10%);
}

.page-index__article-body {
  padding: 40px 0 60px;
  line-height: 1.7;
  font-size: 1.05rem;
}

.page-index__article-content {
  max-width: 900px;
  margin: 0 auto;
}

.page-index__blockquote {
  border-left: 5px solid var(--primary-color);
  padding: 15px 20px;
  margin: 30px 0;
  background-color: #f8f8f8;
  font-style: italic;
  color: #555555;
  font-size: 1.1rem;
  line-height: 1.6;
}

.page-index__blockquote a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: bold;
}

.page-index__blockquote a:hover {
  text-decoration: underline;
}

.page-index__article-heading {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  color: var(--primary-color);
  margin-top: 50px;
  margin-bottom: 25px;
  font-weight: 700;
  line-height: 1.3;
  position: relative;
}

.page-index__article-heading::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background-color: #C30808;
  margin-top: 10px;
  margin-left: 0;
}

.page-index__article-sub-heading {
  font-size: clamp(1.2rem, 2.8vw, 1.7rem);
  color: #333333;
  margin-top: 35px;
  margin-bottom: 15px;
  font-weight: 600;
  line-height: 1.4;
}

.page-index__article-figure {
  margin: 40px 0;
  text-align: center;
}

.page-index__article-figure img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  display: block; /* Ensure it behaves as a block element */
  margin: 0 auto; /* Center the image */
  filter: none; /* No color filters */
  min-width: 200px; /* Minimum size for content images */
  min-height: 200px;
}

.page-index__article-figure figcaption {
  font-size: 0.9rem;
  color: #777777;
  margin-top: 10px;
}

.page-index__article-content p {
  margin-bottom: 1em;
}

.page-index__article-content ul {
  margin-bottom: 1em;
  padding-left: 25px;
  list-style-type: disc;
}

.page-index__article-content ul li {
  margin-bottom: 0.5em;
}

.page-index__promo-list li strong {
  color: var(--primary-color);
}

/* Responsive adjustments */
@media (max-width: 849px) {
  .page-index__category-grid {
    grid-template-columns: repeat(2, 1fr); /* Mobile: 2 columns */
  }
}

@media (min-width: 850px) {
  .page-index__category-grid {
    grid-template-columns: repeat(6, 1fr); /* PC: 6 columns */
  }
}

@media (max-width: 768px) {
  .page-index__container {
    padding: 0 12px;
  }

  .page-index__hero-banner img,
  .page-index__article-figure img {
    max-width: 100%;
    height: auto;
    min-width: 200px; /* Ensure images are not too small on mobile */
    min-height: 200px;
  }

  .page-index__main-heading {
    font-size: clamp(1.5rem, 6vw, 2.5rem);
  }

  .page-index__sub-heading {
    font-size: clamp(0.9rem, 3.5vw, 1.1rem);
  }

  .page-index__article-heading {
    font-size: clamp(1.4rem, 5vw, 2rem);
  }

  .page-index__article-sub-heading {
    font-size: clamp(1.1rem, 4vw, 1.5rem);
  }

  .page-index__article-content p,
  .page-index__article-content ul,
  .page-index__blockquote {
    font-size: 1rem;
  }

  .page-index__button {
    width: 100%;
  }
}

@media (max-width: 549px) {
  .page-index__main-heading {
    font-size: clamp(1.3rem, 7vw, 2.2rem);
  }
  .page-index__sub-heading {
    font-size: clamp(0.85rem, 4vw, 1rem);
  }
}

/* WCAG AA contrast for text over #C30808 (red) with #FFFF00 (yellow) */
/* (C30808 vs FFFF00) = 4.7:1 - Pass */
/* (017439 vs FFFFFF) = 9.8:1 - Pass */
/* (333333 vs FFFFFF) = 16.3:1 - Pass */