:root{
  --fg:#0d1f39;
  --brand:#06a7e2;
  --muted:#6b7280;
  --err:#9e2a26;
}

*{box-sizing:border-box;}
body{
  background:#222744;
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,Ubuntu,Arial,sans-serif;
  color:#111;margin:0;
  display:flex;justify-content:center;align-items:center;
  min-height:100vh;
}
.card{
  width:100%;max-width:420px;
  background:#fff;border-radius:16px;
  box-shadow:0 10px 28px rgba(0,0,0,.28);
  padding:28px;
}
.title{
  font-size:28px;
  color:var(--brand);
  font-weight:800;
  margin-bottom:16px;
  text-align:center;
}
.alert{
  border-radius:10px;padding:10px 12px;margin-bottom:12px;
}
.alert-err{
  background:#fde2e1;
  border:1px solid #f6b9b7;
  color:var(--err);
}
.form-group{margin-bottom:14px}
.form-label{display:block;font-weight:600;margin:0 0 6px;color:#0f172a}
.form-control{
  display:block;width:100%;height:44px;padding:10px 12px;
  background:#fff;color:#111;
  border:1px solid #cfd6e4;border-radius:10px;
}
.form-control:focus{
  border-color:var(--brand);
  outline:none;
  box-shadow:0 0 0 2px rgba(6,167,226,0.25);
}
.btn{
  display:block;border:0;border-radius:10px;
  padding:12px 14px;cursor:pointer;font-weight:700;
}
.btn-brand{
  background:var(--brand);color:#fff;width:100%;
  transition:opacity .2s;
}
.btn-brand:hover{opacity:0.9;}
.links{margin-top:12px;display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.link{color:var(--brand);text-decoration:none}
.hint{color:#6b7280;text-align:center;margin-top:8px;font-size:.9rem}

/* Spinner */
.spinner {
  border:2px solid #fff;
  border-top:2px solid rgba(255,255,255,.3);
  border-radius:50%;
  width:16px;height:16px;
  display:inline-block;
  margin-right:8px;
  vertical-align:middle;
  animation:spin 0.8s linear infinite;
}
@keyframes spin {
  from {transform:rotate(0deg);}
  to {transform:rotate(360deg);}
}

/* Shake animation (falha no login) */
.alert-err {
  animation:shake .35s ease-in-out;
}
@keyframes shake {
  0%,100%{transform:translateX(0);}
  20%,60%{transform:translateX(-6px);}
  40%,80%{transform:translateX(6px);}
}