/* ========================================================================
Business Page — CSS Variables (Light Sections)
======================================================================== */
:root {
  --clr-light-bg:           #ffffff;
  --clr-light-bg-alt:       rgba(24, 56, 34, 0.05);
  --clr-light-text:         #1a1a1a;
  --clr-light-text-muted:   #6b6b6b;
  --clr-light-border:       #e0dbd4;
  --clr-heading:            #183822;
}

/* ========================================================================
Section Common (Light)
======================================================================== */
.sec_light {
  background-color: var(--clr-light-bg);
  color: var(--clr-light-text);
}

.sec_light_alt {
  background-color: var(--clr-light-bg-alt);
  color: var(--clr-light-text);
}

/* Section headings (light sections) */
.sec_light h2,
.sec_light_alt h2 {
  color: var(--clr-heading);
}

/* Heading underline (centered) */
.sec_title_line::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background-color: var(--clr-primary);
  border-radius: 2px;
  margin: 14px auto 0;
}

/* Heading underline (left-aligned) */
.sec_title_line--left::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background-color: var(--clr-primary);
  border-radius: 2px;
  margin: 14px 0 0;
}

/* ========================================================================
Section: Business Policy
======================================================================== */
.sec_business_policy {
  padding: 100px 0;
}

.policy_inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.policy_left h2 {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 600;
  color: var(--clr-heading);
}

.policy_catch {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: var(--clr-primary);
  font-weight: 600;
  line-height: 1.75;
  margin-top: 28px;
  white-space: nowrap;
}

.policy_catch br {
  display: none;
}

/* English: allow natural wrapping (no br tags in body text) */
:lang(en) .policy_catch,
:lang(fr) .policy_catch {
  white-space: normal;
}

.policy_right p {
  font-size: 0.9375rem;
  line-height: 2;
  color: var(--clr-light-text-muted);
}

/* ========================================================================
Section: Business Areas
======================================================================== */
.sec_business_areas {
  padding: 100px 0;
  text-align: center;
}

.areas_desc {
  max-width: 680px;
  margin: 20px auto 56px;
  font-size: 0.9375rem;
  line-height: 2;
  color: var(--clr-light-text-muted);
}

.business_area_cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: left;
}

.business_area_card {
  background-color: var(--clr-light-bg);
  border: 1px solid var(--clr-light-border);
  border-radius: 4px;
  overflow: hidden;
}

.business_area_card__img {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: #2a3a2e;
}

.business_area_card__num {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 1;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #ffffff;
  background-color: var(--clr-primary);
  padding: 4px 10px;
  border-radius: 2px;
  line-height: 1.6;
}

.business_area_card__img picture {
  display: block;
  width: 100%;
  height: 100%;
}

.business_area_card__img img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

.business_area_card:hover .business_area_card__img img {
  transform: scale(1.04);
}

.business_area_card__body {
  padding: 28px 28px 32px;
}

.business_area_card__body h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--clr-heading);
  margin-bottom: 12px;
}

.business_area_card__body p {
  font-size: 0.875rem;
  line-height: 1.85;
  color: var(--clr-light-text-muted);
}

/* ========================================================================
Section: Major Projects (dark)
======================================================================== */
.sec_projects {
  padding: 100px 0;
  background-color: var(--clr-bg);
  text-align: center;
}

.sec_projects h2 {
  color: var(--clr-text);
}

.projects_desc {
  max-width: 760px;
  margin: 20px auto 72px;
  font-size: 0.9375rem;
  line-height: 2;
  color: var(--clr-text-muted);
}

.project_detail_cards {
  display: flex;
  flex-direction: column;
  gap: 80px;
  text-align: left;
}

.project_detail_card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

/* Reverse: body left, image right */
.project_detail_card--reverse .project_detail_img {
  order: 2;
}

.project_detail_card--reverse .project_detail_body {
  order: 1;
}

.project_detail_img {
  border-radius: 4px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background-color: rgba(255, 255, 255, 0.05);
}

.project_detail_img picture {
  display: block;
  width: 100%;
  height: 100%;
}

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

.project_detail_label {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--clr-primary);
  margin-bottom: 10px;
}

.project_detail_title {
  font-size: clamp(1.375rem, 2.5vw, 1.875rem);
  font-weight: 600;
  color: var(--clr-text);
  line-height: 1.3;
  margin-bottom: 10px;
}

.project_detail_subtitle {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.75;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.project_detail_text {
  font-size: 0.9375rem;
  line-height: 2;
  color: var(--clr-text-muted);
  margin-bottom: 36px;
}

.project_stats {
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
}

.project_stat {
  border-left: 2px solid var(--clr-primary);
  padding-left: 16px;
}

.project_stat__label {
  display: block;
  font-size: 0.6875rem;
  color: var(--clr-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.project_stat__value {
  display: block;
  font-size: clamp(1.375rem, 2.5vw, 1.875rem);
  font-weight: 600;
  color: var(--clr-text);
  letter-spacing: 0.02em;
  line-height: 1.2;
  margin: 0;
}

/* ========================================================================
Section: Responsibility
======================================================================== */
.sec_responsibility {
  padding: 100px 0;
  text-align: center;
}

.resp_desc {
  max-width: 760px;
  margin: 20px auto 56px;
  font-size: 0.9375rem;
  line-height: 2;
  color: var(--clr-light-text-muted);
}

.resp_cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.resp_card {
  background-color: var(--clr-light-bg-alt);
  border: 1px solid rgba(24, 56, 34, 0.2);
  border-radius: 4px;
  padding: 36px 24px;
  text-align: center;
}

.resp_card .material-symbols-outlined {
  font-size: 2rem;
  color: var(--clr-heading);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 68px;
  height: 68px;
  border-radius: 50%;
  border: 2px solid var(--clr-heading);
  margin: 0 auto 20px;
}

.resp_card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--clr-heading);
  margin-bottom: 10px;
}

.resp_card p {
  font-size: 0.8125rem;
  line-height: 1.85;
  color: var(--clr-light-text-muted);
}

/* ========================================================================
Responsive
======================================================================== */
@media (max-width: 1024px) {
  .project_detail_card {
    gap: 48px;
  }
}

@media (max-width: 900px) {
  .sec_business_policy,
  .sec_business_areas,
  .sec_projects,
  .sec_responsibility {
    padding: 80px 0;
  }

  /* Policy: single column */
  .policy_inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* Business areas: 2 columns */
  .business_area_cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  /* Projects: stack vertically, reset order */
  .project_detail_card {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .project_detail_card--reverse .project_detail_img,
  .project_detail_card--reverse .project_detail_body {
    order: unset;
  }

  .project_detail_img {
    aspect-ratio: 16 / 9;
  }

  .project_detail_cards {
    gap: 60px;
  }

  /* Responsibility: 2 columns */
  .resp_cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
}

@media (max-width: 767px) {
  .sec_business_policy,
  .sec_business_areas,
  .sec_projects,
  .sec_responsibility {
    padding: 64px 0;
  }

  /* Policy */
  .policy_catch {
    font-size: 1.125rem;
    white-space: normal;
  }

  .policy_catch br {
    display: inline;
  }

  /* Business areas: single column */
  .business_area_cards {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* Projects */
  .project_detail_cards {
    gap: 48px;
  }

  .project_stats {
    gap: 20px;
  }

  /* Responsibility: single column, icon-left layout */
  .resp_cards {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .resp_card {
    display: grid;
    grid-template-columns: 56px 1fr;
    grid-template-rows: auto auto;
    column-gap: 16px;
    row-gap: 6px;
    padding: 24px 20px;
    text-align: left;
  }

  .resp_card .material-symbols-outlined {
    grid-column: 1;
    grid-row: 1 / 3;
    font-size: 1.5rem;
    width: 56px;
    height: 56px;
    margin: 0;
    align-self: center;
  }

  .resp_card h3 {
    grid-column: 2;
    grid-row: 1;
    align-self: end;
    margin-bottom: 0;
  }

  .resp_card p {
    grid-column: 2;
    grid-row: 2;
    align-self: start;
  }

}