.auth-shell {
    min-height: 100vh;
    padding: 24px 16px;
    background:
        radial-gradient(circle at top left, rgba(13, 110, 253, 0.16), transparent 30%),
        radial-gradient(circle at bottom right, rgba(111, 66, 193, 0.1), transparent 28%),
        linear-gradient(135deg, #f4f7fb 0%, #ecf2f9 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-shell .auth-card {
    width: min(100%, 520px);
    border: 0;
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 24px 80px rgba(31, 45, 61, 0.12);
    overflow: hidden;
}

.auth-shell .auth-form-wrap {
    padding: 40px 36px 36px;
}

.auth-shell .auth-brand {
    margin-bottom: 28px;
    text-align: center;
}

.auth-shell .auth-brand-mark {
    width: 64px;
    height: 64px;
    margin: 0 auto 14px;
    border-radius: 20px;
    background: linear-gradient(135deg, #0d6efd 0%, #4aa3ff 100%);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    box-shadow: 0 16px 32px rgba(13, 110, 253, 0.22);
}

.auth-shell .auth-brand h1 {
    margin-bottom: 8px;
    font-size: 1.6rem;
    font-weight: 700;
    color: #1f2d3d;
}

.auth-shell .auth-brand p {
    margin-bottom: 0;
    color: #6c7a89;
}

.auth-shell .form-label {
    font-weight: 600;
    color: #344054;
    margin-bottom: 10px;
}

.auth-shell .input-group-text {
    border-radius: 16px 0 0 16px;
    border-color: #dbe4f0;
    background: #f8fbff;
    color: #7a8ca5;
    padding-inline: 16px;
}

.auth-shell .form-control {
    border-color: #dbe4f0;
    border-radius: 0 16px 16px 0;
    min-height: 52px;
    padding-inline: 16px;
    color: #f4f9ff;
}

.auth-shell .form-control.is-invalid {
    border-color: #dc3545;
}

.auth-shell .input-group:focus-within .input-group-text,
.auth-shell .input-group:focus-within .form-control {
    border-color: #86b7fe;
    box-shadow: none;
}

.auth-shell .form-check-label,
.auth-shell .auth-meta-link,
.auth-shell .auth-footer-text {
    color: #6c7a89;
}

.auth-shell .auth-meta-link {
    font-weight: 600;
    text-decoration: none;
}

.auth-shell .auth-meta-link:hover,
.auth-shell .auth-footer-link:hover {
    color: #0a58ca;
}

.auth-shell .btn-auth-submit {
    min-height: 54px;
    border-radius: 16px;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 14px 28px rgba(13, 110, 253, 0.22);
}

.auth-shell .auth-footer {
    margin-top: 26px;
    padding-top: 22px;
    border-top: 1px solid #e9eef5;
}

.auth-shell .auth-footer-link {
    color: #0d6efd;
    font-weight: 700;
    text-decoration: none;
}

@media (max-width: 991.98px) {
    .auth-shell {
        padding: 20px 12px;
    }

    .auth-shell .auth-form-wrap {
        padding: 32px 24px 28px;
    }
}