body, html { height: 100%; }
.bg-gradient { background: linear-gradient(135deg,#0f2027,#203a43,#2c5364); height:100%; display:flex; align-items:center; justify-content:center; font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
.login-card { background:#fff; width:360px; border-radius:16px; box-shadow:0 20px 50px rgba(0,0,0,.4); overflow:hidden; }
.login-header { background: linear-gradient(135deg,#2c5364,#203a43); padding:24px; color:#fff; text-align:center; }
.login-body { padding:24px; }
.btn-primary, .form-control { border-radius:12px; }
.small { color:#666; }