/* Fundo com listras diagonais claras (como no layout) */
.materiais-section{
  padding: 72px 0;
  background:
    linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.92)),
    repeating-linear-gradient(-45deg, #eef1f5 0 14px, #f5f7fa 14px 28px);
}

/* Card quadrado */
.mat-card{
  position: relative;
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 18px 28px rgba(10,20,60,.10);
  overflow: hidden;

  /* mantém QUADRADO em qualquer breakpoint */
  aspect-ratio: 1 / 1;
}

/* conteúdo do card */
.mat-content{
  position: absolute;
  inset: 18px 18px 18px 18px;           /* padding interno */
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

/* ícone principal do topo (azul) */
.mat-icon{
  font-size: 110px;
  color: var(--ni-blue);
  margin-bottom: 14px;
}

/* título e subtítulo */
.mat-title{
  font-family: "Barlow", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  font-weight: 700;
  /* font-size: clamp(1.05rem, 1.4vw, 1.25rem); */
  font-size: 25px;
  color: var(--ni-gray-800);
  margin: 0px 0 4px;
  
}
.mat-sub{
  font-size: 21px;
  /* margin-top:15px; */
  /* font-size: clamp(.9rem, 1.1vw, 1rem); */
  color: var(--ni-gray-600);
  margin: 0;
}

/* botão de download fixado no canto inferior direito */
.mat-dl{
  position: absolute;
  right: 14px;
  bottom: 14px;
  width: 60px;
  height: 60px;
  background: var(--ni-yellow);
  border-radius: 4px;
  display: grid;
  place-items: center;
  box-shadow: 0 12px 18px rgba(255,184,0,.35);
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.mat-dl img{
  width: 50px;
  height: 50px;
  display: block;
}
.mat-dl:hover{
  transform: translateY(-1px);
  box-shadow: 0 16px 24px rgba(255,184,0,.42);
  background: #ffc63b;
}

/* foco acessível */
.mat-dl:focus-visible{
  outline: 3px solid var(--ni-blue);
  outline-offset: 2px;
}