header{position:fixed;top:0;left:0;right:0;z-index:20;padding:14px 24px}
header .barra{position:relative;width:100%;max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:10px 20px;border:1px solid transparent;border-radius:999px;background:transparent;box-shadow:none;backdrop-filter:none;transition:padding .35s,border-color .35s,background .35s,box-shadow .35s}
header.sol .barra,header.abrir .barra{border-color:rgba(53,32,26,.14);background:rgba(244,244,240,.96);box-shadow:0 8px 28px rgba(0,0,0,.2);backdrop-filter:blur(12px)}
header.sol .barra{padding-top:8px;padding-bottom:8px}
.logo{display:flex;align-items:center;gap:12px;color:var(--pedra);text-decoration:none;font-weight:600;letter-spacing:.18em;text-transform:uppercase;font-size:1.1rem;transition:color .35s}
header.sol .logo,header.abrir .logo{color:var(--tinta)}
.logo img{display:block;width:34px;height:34px;flex:none;object-fit:contain;border-radius:2px}
nav{position:absolute;top:50%;left:50%;display:flex;gap:30px;transform:translate(-50%,-50%)}
nav a{color:var(--pedra);text-decoration:none;font-size:.9rem;text-transform:uppercase;letter-spacing:.03em;opacity:.92;transition:color .35s}
header.sol nav a,header.abrir nav a{color:var(--tinta)}
nav a:hover{opacity:1;text-decoration:underline;text-underline-offset:7px}
.menu-btn{display:none;width:44px;height:44px;border:0;background:none;cursor:pointer;flex-direction:column;justify-content:center;align-items:flex-end;gap:7px}
.menu-btn span{display:block;width:28px;height:2px;background:var(--pedra);transition:background .35s}
header.sol .menu-btn span,header.abrir .menu-btn span{background:var(--tinta)}
.menu-btn span+span{width:20px}

@media (max-width:900px){
  header{padding:10px 16px}
  header .barra{padding:7px 14px}
  header.sol .barra{padding-top:7px;padding-bottom:7px}
  nav{display:none;top:calc(100% + 8px);left:0;right:0;flex-direction:column;gap:18px;padding:18px 24px 22px;transform:none;border:1px solid rgba(53,32,26,.14);border-radius:22px;background:rgba(244,244,240,.96);backdrop-filter:blur(12px)}
  header.abrir nav{display:flex}
  .menu-btn{display:flex}
}

@media (max-width:600px){
  .logo{letter-spacing:.1em;font-size:1rem}
}