:root{
  --azul:#0B1F3A;
  --azul-claro:#3BA7FF;
  --azul-metalico:#4E6E81;
  --verde:#32B768;
  --amarelo:#FFD447;
  --ouro:#D4AF37;
  --branco:#FFFFFF;
  --preto:#111111;
  --cinza:#F3F7FA;
}

*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  scroll-behavior:smooth;
}

body{
  font-family: Arial, Helvetica, sans-serif;
  background: var(--cinza);
  color: var(--preto);
  line-height:1.6;
  transition:0.3s;
}

body.dark{
  background:#101820;
  color:#f1f1f1;
}

header{
  background: linear-gradient(135deg,var(--azul),var(--azul-claro));
  color:white;
  padding:80px 10%;
  position:relative;
  overflow:hidden;
}

header::after{
  content:"";
  position:absolute;
  width:400px;
  height:400px;
  background:rgba(255,255,255,0.08);
  border-radius:50%;
  right:-100px;
  top:-100px;
}

.hero{
  display:flex;
  flex-wrap:wrap;
  gap:40px;
  align-items:center;
  justify-content:space-between;
  position:relative;
  z-index:2;
}

.hero-text{
  flex:1;
  min-width:300px;
}

.hero-text h1{
  font-size:3rem;
  margin-bottom:20px;
  color:var(--amarelo);
}

.hero-text p{
  font-size:1.1rem;
  max-width:700px;
}

.highlight{
  color:var(--verde);
  font-weight:bold;
}

.btn{
  display:inline-block;
  margin-top:25px;
  background:var(--verde);
  color:white;
  padding:14px 24px;
  text-decoration:none;
  border-radius:12px;
  transition:0.3s;
  font-weight:bold;
}

.btn:hover{
  background:var(--ouro);
  transform:translateY(-2px);
}

main{
  padding:60px 8%;
}

.grid{
  display:grid;
  grid-template-columns:2fr 1fr;
  gap:40px;
}

.card{
  background:white;
  border-radius:20px;
  padding:30px;
  margin-bottom:30px;
  box-shadow:0 10px 30px rgba(0,0,0,0.08);
  transition:0.3s;
}

body.dark .card{
  background:#1B2635;
}

.card:hover{
  transform:translateY(-5px);
}

.card h2{
  color:var(--azul);
  margin-bottom:20px;
}

body.dark .card h2{
  color:var(--amarelo);
}

.accordion{
  margin-top:20px;
}

.accordion-item{
  margin-bottom:15px;
  border-radius:14px;
  overflow:hidden;
  border:2px solid rgba(0,0,0,0.05);
}

.accordion-header{
  background:var(--azul);
  color:white;
  padding:18px;
  cursor:pointer;
  font-weight:bold;
  transition:0.3s;
}

.accordion-header:hover{
  background:var(--verde);
}

.accordion-content{
  display:none;
  padding:20px;
  background:white;
}

body.dark .accordion-content{
  background:#243447;
}

.image-space{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:20px;
  margin-top:30px;
}

.placeholder{
  height:220px;
  border:3px dashed var(--azul-metalico);
  border-radius:20px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--azul-metalico);
  background:rgba(255,255,255,0.5);
  text-align:center;
  padding:20px;
  font-weight:bold;
}

aside{
  position:sticky;
  top:20px;
  height:max-content;
}

.form-box{
  background:linear-gradient(180deg,var(--azul),#112E54);
  color:white;
  padding:30px;
  border-radius:20px;
  box-shadow:0 10px 30px rgba(0,0,0,0.2);
}

.form-box h3{
  color:var(--amarelo);
  margin-bottom:15px;
}

.form-box input{
  width:100%;
  padding:14px;
  margin-top:12px;
  border:none;
  border-radius:10px;
}

.form-box button{
  width:100%;
  margin-top:20px;
  padding:15px;
  border:none;
  border-radius:12px;
  background:var(--verde);
  color:white;
  font-weight:bold;
  cursor:pointer;
  transition:0.3s;
}

.form-box button:hover{
  background:var(--ouro);
}

.comentario{
  width:100%;
  height:140px;
  margin-top:20px;
  padding:20px;
  border-radius:14px;
  border:2px solid #ccc;
  resize:none;
}

.accessibility{
  position:fixed;
  left:20px;
  bottom:20px;
  background:var(--azul);
  padding:18px;
  border-radius:18px;
  z-index:999;
  box-shadow:0 8px 25px rgba(0,0,0,0.25);
}

.accessibility h4{
  color:white;
  margin-bottom:12px;
}

.accessibility button{
  margin:4px;
  padding:10px 12px;
  border:none;
  border-radius:10px;
  cursor:pointer;
  background:var(--amarelo);
  font-weight:bold;
}

footer{
  background:var(--azul);
  color:white;
  text-align:center;
  padding:30px;
  margin-top:40px;
}

@media(max-width:900px){

  .grid{
    grid-template-columns:1fr;
  }

  .hero-text h1{
    font-size:2.3rem;
  }

  aside{
    position:relative;
  }

.btn-enviar{
  margin-top:20px;
  padding:14px 24px;
  border:none;
  border-radius:12px;
  background:var(--verde);
  color:white;
  font-weight:bold;
  cursor:pointer;
  transition:0.3s;
}

.btn-enviar:hover{
  background:var(--ouro);
  transform:translateY(-2px);
}