.heading {
  color: white;
  text-transform: uppercase;
  text-align: center;
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: 3.5rem;
  margin-top: 1.5rem;
  border-bottom: 0.5rem solid white;
  border-radius: 5px;
}

.application-areas-section .heading-short {
  font-size: 3rem;
  color: white;
  text-transform: uppercase;
  text-align: center;
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: 3.5rem;
  margin-top: 1.5rem;
  border-bottom: 0.5rem solid white;
  border-radius: 5px;
}

.application-areas-section {

  padding: 6rem 7%;
  margin-top: 2.5rem;
  color: white;
  text-align: center;
}

.section-title {
  font-size: 2.8rem;
  margin-bottom: 3rem;
}

.application-cards {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 0rem;
}

.app-card {
  width: 30rem;
  height: 45rem;
  border-radius: 1.5rem;
  overflow: hidden;
  background: transparent;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;

}

.application-cards #app1 {
  background: url("../images/marble.png");
}

.application-cards #app2 {
  background: url("../images/ceramic.png");
}

.application-cards #app3 {
  background: url("../images/wood.png");
}

.application-cards #app4 {
  background: url("../images/other.png");
  background-size: cover;
  background-position: center -240px;
  background-repeat: no-repeat;
}

.app-card:hover {
  transform: translateY(-6px);
}

.app-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-text {
  padding: 1.5rem;
  background: linear-gradient(to bottom,
      rgba(0, 0, 0, 0.07),
      rgba(0, 0, 0, 0.99));
  /* Üstten alta koyu gradient */
  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(3px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  height: 60%;
}

.cover {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.card-text h3 {
  font-size: 3rem;
  margin-bottom: 0.7rem;
}

.card-text p {
  font-size: 2.5rem;
  opacity: 0.9;
}


.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 2rem;
}

.feature-item {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 1.2rem;
  padding: 1.5rem;
  text-align: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.feature-item img {
  width: 80px;
  margin-bottom: 1rem;
}

.feature-item p {
  font-size: 2.5rem;
  line-height: 1.4;
}

@media (max-width: 907px) {
  .card-text h3 {
    font-size: 2.8rem;
    margin-bottom: 0.7rem;
  }

  .card-text p {
    font-size: 2.3rem;
    opacity: 0.9;
  }
}

@media (max-width: 820px) {
  .card-text h3 {
    font-size: 2.5rem;
    margin-bottom: 0.7rem;
  }

  .card-text p {
    font-size: 2rem;
    opacity: 0.9;
  }
}

@media (max-width: 670px) {
  .card-text h3 {
    font-size: 2rem;
    margin-bottom: 0.7rem;
  }

  .card-text p {
    font-size: 1.5rem;
    opacity: 0.9;
  }
}

@media (max-width: 675px) {
  .feature-item img {
    width: 60px;
  }

  .feature-item p strong {
    font-size: 2.1rem;
    line-height: 1.4;
  }

  .feature-item p {
    font-size: 1.6rem;
    line-height: 1.4;
  }
}

@media (max-width: 550px) {
  .card-text h3 {
    font-size: 1.7rem;
    margin-bottom: 0.7rem;
  }

  .card-text p {
    font-size: 1.3rem;
    opacity: 0.9;
  }
}

@media (max-width: 490px) {
  .card-text h3 {
    font-size: 1.3rem;
    margin-bottom: 0.7rem;
  }

  .card-text p {
    font-size: 1.1rem;
    opacity: 0.9;
  }

  .app-card {
    height: 300px;
  }
  .application-cards #app4 {
  background-position: center -150px;
}
}

@media (max-width: 390px) {
  .card-text h3 {
    display: none;
  }

  .card-text p {
    display: none;
  }

  .app-card {
    height: 300px;
  }

  .card-text {
    background: none;
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
    border: 0;
  }
    .application-cards #app4 {
  background-position: center;
}
}