/* Background */
.bg-auth {
    min-height: 100vh;
    background:
        radial-gradient(1200px 500px at 10% -10%, rgba(82, 91, 255, .25) 0, transparent 55%),
        radial-gradient(1000px 400px at 100% 0%, rgba(0, 255, 194, .20) 0, transparent 45%),
        linear-gradient(135deg, #0d1b2a 0%, #1b263b 60%, #0b132b 100%);
}

/* Navbar gradient */
.bg-gradient-primary {
    background: linear-gradient(90deg, #2563eb 0%, #7c3aed 100%);
}

/* Karty/formuláře */
.card {
    border: 1px solid rgba(255,255,255,.08);
    background: rgba(255,255,255,.9);
    backdrop-filter: blur(6px);
}

.form-control:focus {
    box-shadow: 0 0 0 .2rem rgba(37, 99, 235, .25);
    border-color: #2563eb;
}

/* Taby */
.nav-pills .nav-link {
    color: #e2e8f0;
    border: 1px solid rgba(255,255,255,.2);
    background: rgba(255,255,255,.06);
}
.nav-pills .nav-link.active {
    color: #0b132b;
    background: #fff;
    border-color: #fff;
    font-weight: 600;
}

/* Hlavička sekce */
.section-title {
    color: #fff;
}

/* Alerts jemně průsvitné */
.alert {
    border: none;
    box-shadow: 0 5px 16px rgba(0,0,0,.12);
}