:root {
  --tss-primary: #0e4d82;
  --tss-intro-bg: #a9a9a9;
  --tss-text-dark: #111111;
  --tss-text-muted: #b3b3b3;
}

/* ===== BANNER ===== */
.tss-banner {
  position: relative;
  height: 80vh;
  min-height: 480px;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.tss-banner__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.tss-banner__overlay {
  position: absolute;
  inset: 0;
  background: rgba(14, 77, 130, 0.62);
  z-index: 1;
}

.tss-banner__title {
  position: relative;
  z-index: 2;
  margin: 0;
  color: white;
  font-size: clamp(2.6rem, 5vw, 4.4rem);
  font-weight: 900;
  letter-spacing: 2px;
  text-transform: uppercase;
  text-align: center;
}

/* ===== INTRO SECTION ===== */
.tss-intro {
  display: flex;
  justify-content: center;
  padding: 3rem 1rem;
}

.tss-intro__pill {
  width: min(100%, 1100px);
  padding: 2rem 3rem;
  background: var(--tss-intro-bg);
  border-radius: 999px;
  text-align: center;
}

.tss-intro__title {
  margin: 0 0 1rem;
  color: var(--tss-primary);
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 600;
  line-height: 1.2;
}

.tss-intro__text {
  margin: 0;
  color: var(--tss-primary);
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .tss-intro__pill {
    padding: 1.5rem 1.25rem;
    border-radius: 2rem;
  }
}

/* ===== CHALLENGES SECTION ===== */
.tss-challenges {
  padding: 3rem 1rem 4rem;
}

.tss-challenges__grid {
  width: min(100%, 1100px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 4rem;
  row-gap: 4rem;
}

.tss-challenge-card {
  display: grid;
  grid-template-rows:
    auto
    minmax(6.5rem, auto);
  justify-items: center;
  align-items: start;
  text-align: center;
}

.tss-challenge-card__icon {
  width: 150px;
  height: 150px;
  object-fit: contain;
  margin-bottom: 1.5rem;
}

.tss-challenge-card__title {
  margin: 0 0 1.2rem;
  color: var(--tss-text-dark);
  font-size: clamp(2rem, 2vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  max-width: 32ch;
}

.tss-challenge-card__text {
  margin: 0;
  color: var(--tss-text-muted);
  font-size: clamp(1.05rem, 1.2vw, 1.25rem);
  font-weight: 500;
  line-height: 1.5;
  max-width: 50ch;
}

@media (max-width: 900px) {
  .tss-challenges__grid {
    column-gap: 2rem;
    row-gap: 3rem;
  }

  .tss-challenge-card {
    grid-template-rows:
      auto
      minmax(5.2rem, auto)
      minmax(4.4rem, auto);
  }
}

@media (max-width: 640px) {
  .tss-challenges {
    padding: 2.5rem 1rem 3rem;
  }

  .tss-challenges__grid {
    grid-template-columns: 1fr;
    row-gap: 2.5rem;
  }

  .tss-challenge-card {
    grid-template-rows: auto auto auto;
  }

  .tss-challenge-card__icon {
    width: 90px;
    height: 90px;
    margin-bottom: 1rem;
  }

  .tss-challenge-card__title {
    max-width: 100%;
    margin-bottom: 0.75rem;
  }

  .tss-challenge-card__text {
    max-width: 30ch;
  }
}

/* ===== SOLUTION INTRO ===== */
.tss-solution-intro {
  padding: 2.5rem 1rem 1.5rem;
}

.tss-solution-intro__inner {
  width: min(100%, 80%);
  margin: 0 auto;
  text-align: center;
}

.tss-solution-intro__title {
  margin: 0 0 1rem;
  color: #0e4d82;
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
}

.tss-solution-intro__subtitle {
  margin: 0;
  color: #9b9b9b;
  font-size: clamp(1.2rem, 2.2vw, 2rem);
  font-weight: 600;
  line-height: 1.2;
}

/* ===== DIAGRAM ===== */
.tss-diagram {
  padding: 3rem 1rem;
}

.tss-diagram__wrapper {
  position: relative;
  width: min(100%, 1200px);
  margin: 0 auto;
}

.tss-diagram__img {
  width: 100%;
  display: block;
}

.tss-diagram__label {
  position: absolute;
  color: #111;
  font-weight: 700;
  font-size: clamp(1rem, 1.5vw, 1.4rem);
  text-align: center;
  max-width: 300px;
}

.tss-diagram__label--ihm {
  top: -10%;
  left: 12%;
}

.tss-diagram__label--valve {
  bottom: 5%;
  left: 18%;
}

.tss-diagram__label--epcu {
  bottom: 3%;
  right: 5%;
}

/* ===== CERTIFICATIONS ===== */
.tss-certifications {
  padding: 3rem 1rem 4rem;
}

.tss-certifications__grid {
  width: min(100%, 900px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem 4rem;
  align-items: start;
}

.tss-certification-card {
  display: grid;
  grid-template-rows: auto auto auto;
  justify-items: center;
  align-items: start;
  text-align: center;
}

.tss-certification-card__icon {
  width: 72px;
  height: 72px;
  object-fit: contain;
  margin-bottom: 1rem;
}

.tss-certification-card__title {
  margin: 0 0 0.5rem;
  color: #365486;
  font-size: clamp(1.5rem, 2vw, 2rem);
  font-weight: 700;
  line-height: 1.2;
}

.tss-certification-card__text {
  margin: 0;
  color: #365486;
  font-size: clamp(1.1rem, 1.5vw, 1.5rem);
  font-weight: 400;
  line-height: 1.2;
}

@media (max-width: 640px) {
  .tss-certifications__grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

/* ===== CTA ===== */
.tss-cta {
  padding: 3rem 1rem 4rem;
  display: flex;
  justify-content: center;
}

.tss-cta__button {
  display: inline-block;
  padding: 1.5rem 3rem;
  border-radius: 999px;
  background: #0e4d82;
  color: #ffffff;
  font-size: clamp(1.4rem, 2.5vw, 2.2rem);
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  transition: all 0.25s ease;
}

.tss-cta__button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.tss-cta__button:active {
  transform: translateY(0);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* ===== BIG TEXT ===== */
.tss-big-text {
  padding: 3rem 1rem 4rem;
  display: flex;
  justify-content: center;
}

.tss-big-text__content {
  width: min(95%, 1400px);
  margin: 0;
  text-align: center;
  color: #0e4d82;
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.2;
}

/* ===== BENEFITS CARDS ===== */
.tss-benefits-cards {
  padding: 3rem 1rem 4rem;
  overflow: hidden;
}

.tss-benefits-cards__rows {
  width: min(100%, 1100px);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.tss-benefits-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;

  opacity: 0;
  transition: transform 0.9s ease, opacity 0.9s ease;
}

.tss-benefits-row.animate-left {
  transform: translateX(-100%);
}

.tss-benefits-row.animate-right {
  transform: translateX(100%);
}

.tss-benefits-row.in-view {
  opacity: 1;
  transform: translateX(0);
}

.tss-benefit-card {
  min-height: 250px;
  border-radius: 2rem;
  overflow: hidden;
}

.tss-benefit-card--text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;

  padding: 2rem 2rem 2.25rem;
  text-align: center;
  color: #ffffff;
  background: linear-gradient(135deg, #2f6dad 0%, #0e4d82 100%);
}

.tss-benefit-card__title {
  margin: 0 0 1.25rem;
  color: #ffffff;
  font-size: clamp(1.5rem, 2vw, 2.1rem);
  font-weight: 700;
  line-height: 1.2;
  max-width: 16ch;
}

.tss-benefit-card__text {
  margin: 0;
  color: #ffffff;
  font-size: clamp(1.2rem, 1.2vw, 1.3rem);
  font-weight: 600;
  line-height: 1.35;
  max-width: 22ch;
}

.tss-benefit-card--image {
  background: #d9d9d9;
}

.tss-benefit-card__img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 250px;
  object-fit: cover;
}

@media (max-width: 768px) {
  .tss-benefits-row {
    grid-template-columns: 1fr;
  }

  .tss-benefit-card {
    min-height: 220px;
    border-radius: 1.5rem;
  }

  .tss-benefit-card--text {
    padding: 1.75rem 1.5rem 2rem;
  }

  .tss-benefit-card__title,
  .tss-benefit-card__text {
    max-width: 100%;
  }

  .tss-benefit-card__img {
    min-height: 220px;
  }
}

.tss-applications {
  padding: 3rem 1rem 4rem;
  text-align: center;
}

.tss-applications__title {
  margin: 0 0 2.5rem;
  color: var(--tss-primary);
  font-size: clamp(2rem, 3vw, 3rem);
  font-weight: 700;
}

/* ===== GRID ===== */
.tss-applications__grid {
  width: min(100%, 1100px);
  margin: 0 auto;

  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));

  column-gap: 5rem; /* + aéré */
  row-gap: 4rem;

  align-items: center;
  justify-items: center;
}

/* ===== IMAGE ===== */
.tss-applications__img {
  width: 100%;
  max-width: 280px;
  height: auto;
  object-fit: contain;

  transition: transform 0.3s ease;
}

/* hover clean */
.tss-applications__img:hover {
  transform: translateY(-6px) scale(1.03);
}

/* ===== IMAGE CENTRALE ===== */
.tss-applications__img:nth-of-type(3) {
  grid-column: span 2;
  max-width: 320px;
}

/* ===== MOBILE ===== */
@media (max-width: 768px) {
  .tss-applications__grid {
    grid-template-columns: 1fr;
    row-gap: 3rem;
  }

  /* ⚠️ reset important */
  .tss-applications__img:nth-of-type(3) {
    grid-column: span 1;
  }

  .tss-applications__img {
    max-width: 260px;
  }
}