body {
            background: #152036;
            font-family: 'Roboto', sans-serif;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .nk-auth-card {
            background: #1b2a47;
            border: 1px solid rgba(255,255,255,0.06);
            border-radius: 12px;
            width: 100%;
            max-width: 420px;
            padding: 40px;
        }
        .nk-auth-logo {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 1px;
        }
        .nk-auth-logo span {
            color: #03a9f4;
        }
        .nk-auth-card .form-control {
            background: #152036;
            border: 1px solid #253a5c;
            color: #fff;
            border-radius: 8px;
            padding: 10px 14px;
            font-size: 14px;
        }
        .nk-auth-card .form-control:focus {
            border-color: #03a9f4;
            box-shadow: 0 0 0 2px rgba(3,169,244,0.15);
            background: #152036;
            color: #fff;
        }
        .nk-auth-card .form-control::placeholder { color: #6c7a8d; }
        .nk-auth-card .form-label { color: #8a9bb5; font-size: 13px; font-weight: 500; }
        .nk-auth-card .form-text { color: #5a6a7f; }
        .nk-auth-card .form-check-label { color: #8a9bb5; font-size: 13px; }
        .nk-auth-card .form-check-input {
            background-color: #253a5c;
            border-color: #253a5c;
        }
        .nk-auth-card .form-check-input:checked {
            background-color: #03a9f4;
            border-color: #03a9f4;
        }
        .btn-nk-primary {
            background: #03a9f4;
            border: none;
            color: #fff;
            border-radius: 8px;
            padding: 10px;
            font-weight: 500;
            font-size: 15px;
            transition: background 0.2s;
        }
        .btn-nk-primary:hover { background: #0290d1; color: #fff; }
        .btn-nk-outline {
            background: transparent;
            border: 1px solid #253a5c;
            color: #8a9bb5;
            border-radius: 8px;
            padding: 10px;
            font-size: 14px;
            transition: all 0.2s;
        }
        .btn-nk-outline:hover { border-color: #03a9f4; color: #03a9f4; }
        .nk-auth-footer { color: #5a6a7f; font-size: 13px; }
        .nk-auth-footer a { color: #03a9f4; text-decoration: none; }
        .nk-auth-footer a:hover { text-decoration: underline; }
        .nk-divider {
            display: flex;
            align-items: center;
            color: #5a6a7f;
            font-size: 12px;
            margin: 20px 0;
        }
        .nk-divider::before, .nk-divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: #253a5c;
        }
        .nk-divider span { padding: 0 12px; }