:root{
  --azul-petroleo:#003F63;
  --verde-petroleo:#224B4B;
  --cobre:#C47E38;
  --neutro:#6C757D;
  --fundo:#ECEFF1; /* cinza claro conforme solicitado */
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:"Poppins",system-ui,Arial,sans-serif;
  background:var(--fundo);
  color:var(--neutro);
}

/* hero full-screen with watermark */
.hero{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  position:relative;
  overflow:hidden;
  padding:40px;
}

/* subtle watermark using the logo with low opacity */
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image: url('assets/logo.png');
  background-repeat:no-repeat;
  background-position:center 42%;
  background-size:45%;
  opacity:0.08;
  filter:saturate(0.2);
  pointer-events:none;
}

.container{
  position:relative;
  z-index:2;
  width:100%;
  max-width:980px;
  text-align:center;
  background: linear-gradient(180deg, rgba(255,255,255,0.92), rgba(255,255,255,0.98));
  padding:56px 28px;
  border-radius:12px;
  margin: 24px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.06);
}

.brand{
  display:block;
  margin:0 auto 18px;
  width:160px;
  height:auto;
}

h1{
  font-size:clamp(22px,4vw,40px);
  color:var(--azul-petroleo);
  letter-spacing:-0.02em;
  margin-bottom:10px;
  font-weight:700;
  line-height:1.1;
}
h1 span{ color:var(--cobre); display:inline-block; }

h1 small{
  font-size:14px;
  display:block;
  margin-top:8px;
  color:var(--neutro);
  font-weight:600;
}

.sub{
  color:var(--neutro);
  margin-bottom:16px;
  font-size:16px;
}

.form-inline{
  display:flex;
  gap:12px;
  justify-content:center;
  flex-wrap:wrap;
  margin-top:12px;
}
.form-inline input[type="email"]{
  padding:12px 14px;
  border-radius:8px;
  border:1px solid rgba(0,0,0,0.08);
  min-width:260px;
  outline:none;
  font-size:15px;
}
.form-inline button{
  background:linear-gradient(90deg,var(--cobre),#b9652e);
  color:#fff;
  border:none;
  padding:12px 18px;
  border-radius:8px;
  font-weight:700;
  cursor:pointer;
  box-shadow:0 6px 14px rgba(196,126,56,0.18);
  transition:transform .15s ease;
}
.form-inline button:hover{ transform:translateY(-2px); }

footer{
  margin-top:18px;
  color:var(--neutro);
  font-size:13px;
}

/* small screens adjustments */
@media (max-width:720px){
  .container{ padding:36px 18px; }
  .brand{ width:130px; }
  .form-inline input[type="email"]{ min-width:200px; }
}