:root{
  --gt-fundo:#2F414F; --gt-fundo-esc:#243341; --gt-ciano:#1FB2D8; --gt-ciano-cl:#C4E5FF;
}
body{background:#f2f5f8;color:#1d2a36;font-size:14px}
.gt-nav{background:var(--gt-fundo)}
.gt-nav .navbar-brand{font-weight:700;letter-spacing:.3px;color:#fff}
.gt-logo{border-radius:8px}
.gt-nav .nav-link.active{color:var(--gt-ciano-cl);font-weight:600}
.gt-main{max-width:1200px;margin:0 auto}
.btn-gt{background:var(--gt-ciano);border-color:var(--gt-ciano);color:#fff}
.btn-gt:hover,.btn-gt:focus{background:#169bbd;border-color:#169bbd;color:#fff}
.gt-card{background:#fff;border:1px solid #dde4ea;border-radius:10px;padding:14px}
.gt-tabela th{font-size:.75rem;text-transform:uppercase;letter-spacing:.4px;color:#5d6f7e;font-weight:600;white-space:nowrap}
.gt-tabela td{vertical-align:middle}
.gt-tom{display:inline-block;min-width:2.6em;text-align:center;background:var(--gt-ciano-cl);color:#16445a;border-radius:6px;padding:1px 6px;font-weight:600;font-size:.8rem}
.gt-login{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--gt-fundo)}
.gt-login .gt-card{width:100%;max-width:380px;padding:26px}
.gt-login img{display:block;margin:0 auto 10px;border-radius:14px}
.gt-cifra{font-family:Consolas,"Courier New",monospace;white-space:pre;min-height:10rem}